1466 lines
58 KiB
Plaintext
1466 lines
58 KiB
Plaintext
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/**
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* The `node:test` module facilitates the creation of JavaScript tests.
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* To access it:
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*
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* ```js
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* import test from 'node:test';
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* ```
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*
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* This module is only available under the `node:` scheme. The following will not
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* work:
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*
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* ```js
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* import test from 'test';
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* ```
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*
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* Tests created via the `test` module consist of a single function that is
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* processed in one of three ways:
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*
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* 1. A synchronous function that is considered failing if it throws an exception,
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* and is considered passing otherwise.
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* 2. A function that returns a `Promise` that is considered failing if the`Promise` rejects, and is considered passing if the `Promise` fulfills.
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* 3. A function that receives a callback function. If the callback receives any
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* truthy value as its first argument, the test is considered failing. If a
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* falsy value is passed as the first argument to the callback, the test is
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* considered passing. If the test function receives a callback function and
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* also returns a `Promise`, the test will fail.
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*
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* The following example illustrates how tests are written using the`test` module.
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*
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* ```js
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* test('synchronous passing test', (t) => {
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* // This test passes because it does not throw an exception.
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* assert.strictEqual(1, 1);
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* });
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*
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* test('synchronous failing test', (t) => {
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* // This test fails because it throws an exception.
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* assert.strictEqual(1, 2);
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* });
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*
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* test('asynchronous passing test', async (t) => {
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* // This test passes because the Promise returned by the async
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* // function is settled and not rejected.
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* assert.strictEqual(1, 1);
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* });
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*
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* test('asynchronous failing test', async (t) => {
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* // This test fails because the Promise returned by the async
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* // function is rejected.
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* assert.strictEqual(1, 2);
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* });
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*
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* test('failing test using Promises', (t) => {
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* // Promises can be used directly as well.
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* return new Promise((resolve, reject) => {
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* setImmediate(() => {
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* reject(new Error('this will cause the test to fail'));
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* });
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* });
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* });
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*
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* test('callback passing test', (t, done) => {
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* // done() is the callback function. When the setImmediate() runs, it invokes
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* // done() with no arguments.
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* setImmediate(done);
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* });
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*
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* test('callback failing test', (t, done) => {
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* // When the setImmediate() runs, done() is invoked with an Error object and
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* // the test fails.
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* setImmediate(() => {
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* done(new Error('callback failure'));
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* });
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* });
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* ```
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*
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* If any tests fail, the process exit code is set to `1`.
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* @since v18.0.0, v16.17.0
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* @see [source](https://github.com/nodejs/node/blob/v20.4.0/lib/test.js)
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*/
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declare module "node:test" {
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import { Readable } from "node:stream";
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import { AsyncResource } from "node:async_hooks";
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/**
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* **Note:**`shard` is used to horizontally parallelize test running across
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* machines or processes, ideal for large-scale executions across varied
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* environments. It's incompatible with `watch` mode, tailored for rapid
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* code iteration by automatically rerunning tests on file changes.
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*
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* ```js
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* import { tap } from 'node:test/reporters';
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* import { run } from 'node:test';
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* import process from 'node:process';
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* import path from 'node:path';
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*
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* run({ files: [path.resolve('./tests/test.js')] })
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* .compose(tap)
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* .pipe(process.stdout);
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* ```
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* @since v18.9.0, v16.19.0
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* @param options Configuration options for running tests. The following properties are supported:
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*/
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function run(options?: RunOptions): TestsStream;
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/**
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* The `test()` function is the value imported from the `test` module. Each
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* invocation of this function results in reporting the test to the `TestsStream`.
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*
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* The `TestContext` object passed to the `fn` argument can be used to perform
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* actions related to the current test. Examples include skipping the test, adding
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* additional diagnostic information, or creating subtests.
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*
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* `test()` returns a `Promise` that fulfills once the test completes.
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* if `test()` is called within a `describe()` block, it fulfills immediately.
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* The return value can usually be discarded for top level tests.
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* However, the return value from subtests should be used to prevent the parent
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* test from finishing first and cancelling the subtest
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* as shown in the following example.
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*
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* ```js
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* test('top level test', async (t) => {
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* // The setTimeout() in the following subtest would cause it to outlive its
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* // parent test if 'await' is removed on the next line. Once the parent test
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* // completes, it will cancel any outstanding subtests.
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* await t.test('longer running subtest', async (t) => {
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* return new Promise((resolve, reject) => {
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* setTimeout(resolve, 1000);
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* });
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* });
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* });
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* ```
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*
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* The `timeout` option can be used to fail the test if it takes longer than`timeout` milliseconds to complete. However, it is not a reliable mechanism for
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* canceling tests because a running test might block the application thread and
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* thus prevent the scheduled cancellation.
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* @since v18.0.0, v16.17.0
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* @param [name='The name'] The name of the test, which is displayed when reporting test results.
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* @param options Configuration options for the test. The following properties are supported:
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* @param [fn='A no-op function'] The function under test. The first argument to this function is a {@link TestContext} object. If the test uses callbacks, the callback function is passed as the
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* second argument.
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* @return Fulfilled with `undefined` once the test completes, or immediately if the test runs within {@link describe}.
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*/
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function test(name?: string, fn?: TestFn): Promise<void>;
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function test(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
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function test(options?: TestOptions, fn?: TestFn): Promise<void>;
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function test(fn?: TestFn): Promise<void>;
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namespace test {
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export { after, afterEach, before, beforeEach, describe, it, mock, only, run, skip, test, todo };
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}
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/**
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* The `describe()` function imported from the `node:test` module. Each
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* invocation of this function results in the creation of a Subtest.
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* After invocation of top level `describe` functions,
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* all top level tests and suites will execute.
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* @param [name='The name'] The name of the suite, which is displayed when reporting test results.
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* @param options Configuration options for the suite. supports the same options as `test([name][, options][, fn])`.
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* @param [fn='A no-op function'] The function under suite declaring all subtests and subsuites. The first argument to this function is a {@link SuiteContext} object.
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* @return Immediately fulfilled with `undefined`.
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*/
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function describe(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
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function describe(name?: string, fn?: SuiteFn): Promise<void>;
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function describe(options?: TestOptions, fn?: SuiteFn): Promise<void>;
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function describe(fn?: SuiteFn): Promise<void>;
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namespace describe {
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/**
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* Shorthand for skipping a suite, same as `describe([name], { skip: true }[, fn])`.
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*/
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function skip(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
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function skip(name?: string, fn?: SuiteFn): Promise<void>;
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function skip(options?: TestOptions, fn?: SuiteFn): Promise<void>;
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function skip(fn?: SuiteFn): Promise<void>;
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/**
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* Shorthand for marking a suite as `TODO`, same as `describe([name], { todo: true }[, fn])`.
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*/
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function todo(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
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function todo(name?: string, fn?: SuiteFn): Promise<void>;
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function todo(options?: TestOptions, fn?: SuiteFn): Promise<void>;
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function todo(fn?: SuiteFn): Promise<void>;
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/**
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* Shorthand for marking a suite as `only`, same as `describe([name], { only: true }[, fn])`.
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* @since v18.15.0
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*/
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function only(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
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function only(name?: string, fn?: SuiteFn): Promise<void>;
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function only(options?: TestOptions, fn?: SuiteFn): Promise<void>;
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function only(fn?: SuiteFn): Promise<void>;
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}
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/**
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* Shorthand for `test()`.
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*
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* The `it()` function is imported from the `node:test` module.
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* @since v18.6.0, v16.17.0
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*/
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function it(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
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function it(name?: string, fn?: TestFn): Promise<void>;
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function it(options?: TestOptions, fn?: TestFn): Promise<void>;
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function it(fn?: TestFn): Promise<void>;
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namespace it {
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/**
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* Shorthand for skipping a test, same as `it([name], { skip: true }[, fn])`.
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*/
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function skip(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
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function skip(name?: string, fn?: TestFn): Promise<void>;
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function skip(options?: TestOptions, fn?: TestFn): Promise<void>;
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function skip(fn?: TestFn): Promise<void>;
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/**
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* Shorthand for marking a test as `TODO`, same as `it([name], { todo: true }[, fn])`.
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*/
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function todo(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
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function todo(name?: string, fn?: TestFn): Promise<void>;
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function todo(options?: TestOptions, fn?: TestFn): Promise<void>;
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function todo(fn?: TestFn): Promise<void>;
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/**
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* Shorthand for marking a test as `only`, same as `it([name], { only: true }[, fn])`.
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* @since v18.15.0
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*/
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function only(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
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function only(name?: string, fn?: TestFn): Promise<void>;
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function only(options?: TestOptions, fn?: TestFn): Promise<void>;
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function only(fn?: TestFn): Promise<void>;
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}
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/**
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* Shorthand for skipping a test, same as `test([name], { skip: true }[, fn])`.
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* @since v20.2.0
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*/
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function skip(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
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function skip(name?: string, fn?: TestFn): Promise<void>;
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function skip(options?: TestOptions, fn?: TestFn): Promise<void>;
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function skip(fn?: TestFn): Promise<void>;
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/**
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* Shorthand for marking a test as `TODO`, same as `test([name], { todo: true }[, fn])`.
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* @since v20.2.0
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*/
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function todo(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
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function todo(name?: string, fn?: TestFn): Promise<void>;
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function todo(options?: TestOptions, fn?: TestFn): Promise<void>;
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function todo(fn?: TestFn): Promise<void>;
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/**
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* Shorthand for marking a test as `only`, same as `test([name], { only: true }[, fn])`.
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* @since v20.2.0
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*/
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function only(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
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function only(name?: string, fn?: TestFn): Promise<void>;
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function only(options?: TestOptions, fn?: TestFn): Promise<void>;
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function only(fn?: TestFn): Promise<void>;
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/**
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* The type of a function under test. The first argument to this function is a
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* {@link TestContext} object. If the test uses callbacks, the callback function is passed as
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* the second argument.
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*/
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type TestFn = (t: TestContext, done: (result?: any) => void) => void | Promise<void>;
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/**
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* The type of a function under Suite.
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*/
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type SuiteFn = (s: SuiteContext) => void | Promise<void>;
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interface TestShard {
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/**
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* A positive integer between 1 and `<total>` that specifies the index of the shard to run.
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*/
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index: number;
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/**
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* A positive integer that specifies the total number of shards to split the test files to.
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*/
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total: number;
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}
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interface RunOptions {
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/**
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* If a number is provided, then that many files would run in parallel.
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* If truthy, it would run (number of cpu cores - 1) files in parallel.
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* If falsy, it would only run one file at a time.
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* If unspecified, subtests inherit this value from their parent.
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* @default true
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*/
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concurrency?: number | boolean | undefined;
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/**
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* An array containing the list of files to run.
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* If unspecified, the test runner execution model will be used.
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*/
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files?: readonly string[] | undefined;
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/**
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* Allows aborting an in-progress test execution.
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* @default undefined
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*/
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signal?: AbortSignal | undefined;
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/**
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* A number of milliseconds the test will fail after.
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* If unspecified, subtests inherit this value from their parent.
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* @default Infinity
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*/
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timeout?: number | undefined;
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/**
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* Sets inspector port of test child process.
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* If a nullish value is provided, each process gets its own port,
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* incremented from the primary's `process.debugPort`.
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*/
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inspectPort?: number | (() => number) | undefined;
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/**
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* That can be used to only run tests whose name matches the provided pattern.
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* Test name patterns are interpreted as JavaScript regular expressions.
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* For each test that is executed, any corresponding test hooks, such as `beforeEach()`, are also run.
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*/
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testNamePatterns?: string | RegExp | string[] | RegExp[];
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/**
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* If truthy, the test context will only run tests that have the `only` option set
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*/
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only?: boolean;
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/**
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* A function that accepts the TestsStream instance and can be used to setup listeners before any tests are run.
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*/
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setup?: (root: Test) => void | Promise<void>;
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/**
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* Whether to run in watch mode or not.
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* @default false
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*/
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watch?: boolean | undefined;
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/**
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* Running tests in a specific shard.
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* @default undefined
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*/
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shard?: TestShard | undefined;
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}
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class Test extends AsyncResource {
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concurrency: number;
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nesting: number;
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only: boolean;
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reporter: TestsStream;
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runOnlySubtests: boolean;
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testNumber: number;
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timeout: number | null;
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}
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/**
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* A successful call to `run()` method will return a new `TestsStream` object, streaming a series of events representing the execution of the tests.`TestsStream` will emit events, in the
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* order of the tests definition
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* @since v18.9.0, v16.19.0
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*/
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class TestsStream extends Readable implements NodeJS.ReadableStream {
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addListener(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
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addListener(event: "test:fail", listener: (data: TestFail) => void): this;
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addListener(event: "test:pass", listener: (data: TestPass) => void): this;
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addListener(event: "test:plan", listener: (data: TestPlan) => void): this;
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addListener(event: "test:start", listener: (data: TestStart) => void): this;
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addListener(event: "test:stderr", listener: (data: TestStderr) => void): this;
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addListener(event: "test:stdout", listener: (data: TestStdout) => void): this;
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addListener(event: string, listener: (...args: any[]) => void): this;
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emit(event: "test:diagnostic", data: DiagnosticData): boolean;
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emit(event: "test:fail", data: TestFail): boolean;
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emit(event: "test:pass", data: TestPass): boolean;
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emit(event: "test:plan", data: TestPlan): boolean;
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emit(event: "test:start", data: TestStart): boolean;
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emit(event: "test:stderr", data: TestStderr): boolean;
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emit(event: "test:stdout", data: TestStdout): boolean;
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emit(event: string | symbol, ...args: any[]): boolean;
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on(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
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on(event: "test:fail", listener: (data: TestFail) => void): this;
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on(event: "test:pass", listener: (data: TestPass) => void): this;
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on(event: "test:plan", listener: (data: TestPlan) => void): this;
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on(event: "test:start", listener: (data: TestStart) => void): this;
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on(event: "test:stderr", listener: (data: TestStderr) => void): this;
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on(event: "test:stdout", listener: (data: TestStdout) => void): this;
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on(event: string, listener: (...args: any[]) => void): this;
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once(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
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once(event: "test:fail", listener: (data: TestFail) => void): this;
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once(event: "test:pass", listener: (data: TestPass) => void): this;
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once(event: "test:plan", listener: (data: TestPlan) => void): this;
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once(event: "test:start", listener: (data: TestStart) => void): this;
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once(event: "test:stderr", listener: (data: TestStderr) => void): this;
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once(event: "test:stdout", listener: (data: TestStdout) => void): this;
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once(event: string, listener: (...args: any[]) => void): this;
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prependListener(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
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||
|
prependListener(event: "test:fail", listener: (data: TestFail) => void): this;
|
||
|
prependListener(event: "test:pass", listener: (data: TestPass) => void): this;
|
||
|
prependListener(event: "test:plan", listener: (data: TestPlan) => void): this;
|
||
|
prependListener(event: "test:start", listener: (data: TestStart) => void): this;
|
||
|
prependListener(event: "test:stderr", listener: (data: TestStderr) => void): this;
|
||
|
prependListener(event: "test:stdout", listener: (data: TestStdout) => void): this;
|
||
|
prependListener(event: string, listener: (...args: any[]) => void): this;
|
||
|
prependOnceListener(event: "test:diagnostic", listener: (data: DiagnosticData) => void): this;
|
||
|
prependOnceListener(event: "test:fail", listener: (data: TestFail) => void): this;
|
||
|
prependOnceListener(event: "test:pass", listener: (data: TestPass) => void): this;
|
||
|
prependOnceListener(event: "test:plan", listener: (data: TestPlan) => void): this;
|
||
|
prependOnceListener(event: "test:start", listener: (data: TestStart) => void): this;
|
||
|
prependOnceListener(event: "test:stderr", listener: (data: TestStderr) => void): this;
|
||
|
prependOnceListener(event: "test:stdout", listener: (data: TestStdout) => void): this;
|
||
|
prependOnceListener(event: string, listener: (...args: any[]) => void): this;
|
||
|
}
|
||
|
/**
|
||
|
* An instance of `TestContext` is passed to each test function in order to
|
||
|
* interact with the test runner. However, the `TestContext` constructor is not
|
||
|
* exposed as part of the API.
|
||
|
* @since v18.0.0, v16.17.0
|
||
|
*/
|
||
|
class TestContext {
|
||
|
/**
|
||
|
* This function is used to create a hook running before subtest of the current test.
|
||
|
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
|
||
|
* the second argument. Default: A no-op function.
|
||
|
* @param options Configuration options for the hook.
|
||
|
* @since v20.1.0
|
||
|
*/
|
||
|
before: typeof before;
|
||
|
/**
|
||
|
* This function is used to create a hook running before each subtest of the current test.
|
||
|
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
|
||
|
* the second argument. Default: A no-op function.
|
||
|
* @param options Configuration options for the hook.
|
||
|
* @since v18.8.0
|
||
|
*/
|
||
|
beforeEach: typeof beforeEach;
|
||
|
/**
|
||
|
* This function is used to create a hook that runs after the current test finishes.
|
||
|
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
|
||
|
* the second argument. Default: A no-op function.
|
||
|
* @param options Configuration options for the hook.
|
||
|
* @since v18.13.0
|
||
|
*/
|
||
|
after: typeof after;
|
||
|
/**
|
||
|
* This function is used to create a hook running after each subtest of the current test.
|
||
|
* @param fn The hook function. If the hook uses callbacks, the callback function is passed as
|
||
|
* the second argument. Default: A no-op function.
|
||
|
* @param options Configuration options for the hook.
|
||
|
* @since v18.8.0
|
||
|
*/
|
||
|
afterEach: typeof afterEach;
|
||
|
/**
|
||
|
* This function is used to write diagnostics to the output. Any diagnostic
|
||
|
* information is included at the end of the test's results. This function does
|
||
|
* not return a value.
|
||
|
*
|
||
|
* ```js
|
||
|
* test('top level test', (t) => {
|
||
|
* t.diagnostic('A diagnostic message');
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.0.0, v16.17.0
|
||
|
* @param message Message to be reported.
|
||
|
*/
|
||
|
diagnostic(message: string): void;
|
||
|
/**
|
||
|
* The name of the test.
|
||
|
* @since v18.8.0, v16.18.0
|
||
|
*/
|
||
|
readonly name: string;
|
||
|
/**
|
||
|
* If `shouldRunOnlyTests` is truthy, the test context will only run tests that
|
||
|
* have the `only` option set. Otherwise, all tests are run. If Node.js was not
|
||
|
* started with the `--test-only` command-line option, this function is a
|
||
|
* no-op.
|
||
|
*
|
||
|
* ```js
|
||
|
* test('top level test', (t) => {
|
||
|
* // The test context can be set to run subtests with the 'only' option.
|
||
|
* t.runOnly(true);
|
||
|
* return Promise.all([
|
||
|
* t.test('this subtest is now skipped'),
|
||
|
* t.test('this subtest is run', { only: true }),
|
||
|
* ]);
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.0.0, v16.17.0
|
||
|
* @param shouldRunOnlyTests Whether or not to run `only` tests.
|
||
|
*/
|
||
|
runOnly(shouldRunOnlyTests: boolean): void;
|
||
|
/**
|
||
|
* ```js
|
||
|
* test('top level test', async (t) => {
|
||
|
* await fetch('some/uri', { signal: t.signal });
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.7.0, v16.17.0
|
||
|
*/
|
||
|
readonly signal: AbortSignal;
|
||
|
/**
|
||
|
* This function causes the test's output to indicate the test as skipped. If`message` is provided, it is included in the output. Calling `skip()` does
|
||
|
* not terminate execution of the test function. This function does not return a
|
||
|
* value.
|
||
|
*
|
||
|
* ```js
|
||
|
* test('top level test', (t) => {
|
||
|
* // Make sure to return here as well if the test contains additional logic.
|
||
|
* t.skip('this is skipped');
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.0.0, v16.17.0
|
||
|
* @param message Optional skip message.
|
||
|
*/
|
||
|
skip(message?: string): void;
|
||
|
/**
|
||
|
* This function adds a `TODO` directive to the test's output. If `message` is
|
||
|
* provided, it is included in the output. Calling `todo()` does not terminate
|
||
|
* execution of the test function. This function does not return a value.
|
||
|
*
|
||
|
* ```js
|
||
|
* test('top level test', (t) => {
|
||
|
* // This test is marked as `TODO`
|
||
|
* t.todo('this is a todo');
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.0.0, v16.17.0
|
||
|
* @param message Optional `TODO` message.
|
||
|
*/
|
||
|
todo(message?: string): void;
|
||
|
/**
|
||
|
* This function is used to create subtests under the current test. This function behaves in
|
||
|
* the same fashion as the top level {@link test} function.
|
||
|
* @since v18.0.0
|
||
|
* @param name The name of the test, which is displayed when reporting test results.
|
||
|
* Default: The `name` property of fn, or `'<anonymous>'` if `fn` does not have a name.
|
||
|
* @param options Configuration options for the test
|
||
|
* @param fn The function under test. This first argument to this function is a
|
||
|
* {@link TestContext} object. If the test uses callbacks, the callback function is
|
||
|
* passed as the second argument. Default: A no-op function.
|
||
|
* @returns A {@link Promise} resolved with `undefined` once the test completes.
|
||
|
*/
|
||
|
test: typeof test;
|
||
|
/**
|
||
|
* Each test provides its own MockTracker instance.
|
||
|
*/
|
||
|
readonly mock: MockTracker;
|
||
|
}
|
||
|
/**
|
||
|
* An instance of `SuiteContext` is passed to each suite function in order to
|
||
|
* interact with the test runner. However, the `SuiteContext` constructor is not
|
||
|
* exposed as part of the API.
|
||
|
* @since v18.7.0, v16.17.0
|
||
|
*/
|
||
|
class SuiteContext {
|
||
|
/**
|
||
|
* The name of the suite.
|
||
|
* @since v18.8.0, v16.18.0
|
||
|
*/
|
||
|
readonly name: string;
|
||
|
/**
|
||
|
* Can be used to abort test subtasks when the test has been aborted.
|
||
|
* @since v18.7.0, v16.17.0
|
||
|
*/
|
||
|
readonly signal: AbortSignal;
|
||
|
}
|
||
|
interface TestOptions {
|
||
|
/**
|
||
|
* If a number is provided, then that many tests would run in parallel.
|
||
|
* If truthy, it would run (number of cpu cores - 1) tests in parallel.
|
||
|
* For subtests, it will be `Infinity` tests in parallel.
|
||
|
* If falsy, it would only run one test at a time.
|
||
|
* If unspecified, subtests inherit this value from their parent.
|
||
|
* @default false
|
||
|
*/
|
||
|
concurrency?: number | boolean | undefined;
|
||
|
/**
|
||
|
* If truthy, and the test context is configured to run `only` tests, then this test will be
|
||
|
* run. Otherwise, the test is skipped.
|
||
|
* @default false
|
||
|
*/
|
||
|
only?: boolean | undefined;
|
||
|
/**
|
||
|
* Allows aborting an in-progress test.
|
||
|
* @since v18.8.0
|
||
|
*/
|
||
|
signal?: AbortSignal | undefined;
|
||
|
/**
|
||
|
* If truthy, the test is skipped. If a string is provided, that string is displayed in the
|
||
|
* test results as the reason for skipping the test.
|
||
|
* @default false
|
||
|
*/
|
||
|
skip?: boolean | string | undefined;
|
||
|
/**
|
||
|
* A number of milliseconds the test will fail after. If unspecified, subtests inherit this
|
||
|
* value from their parent.
|
||
|
* @default Infinity
|
||
|
* @since v18.7.0
|
||
|
*/
|
||
|
timeout?: number | undefined;
|
||
|
/**
|
||
|
* If truthy, the test marked as `TODO`. If a string is provided, that string is displayed in
|
||
|
* the test results as the reason why the test is `TODO`.
|
||
|
* @default false
|
||
|
*/
|
||
|
todo?: boolean | string | undefined;
|
||
|
}
|
||
|
/**
|
||
|
* This function is used to create a hook running before running a suite.
|
||
|
*
|
||
|
* ```js
|
||
|
* describe('tests', async () => {
|
||
|
* before(() => console.log('about to run some test'));
|
||
|
* it('is a subtest', () => {
|
||
|
* assert.ok('some relevant assertion here');
|
||
|
* });
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.8.0, v16.18.0
|
||
|
* @param [fn='A no-op function'] The hook function. If the hook uses callbacks, the callback function is passed as the second argument.
|
||
|
* @param options Configuration options for the hook. The following properties are supported:
|
||
|
*/
|
||
|
function before(fn?: HookFn, options?: HookOptions): void;
|
||
|
/**
|
||
|
* This function is used to create a hook running after running a suite.
|
||
|
*
|
||
|
* ```js
|
||
|
* describe('tests', async () => {
|
||
|
* after(() => console.log('finished running tests'));
|
||
|
* it('is a subtest', () => {
|
||
|
* assert.ok('some relevant assertion here');
|
||
|
* });
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.8.0, v16.18.0
|
||
|
* @param [fn='A no-op function'] The hook function. If the hook uses callbacks, the callback function is passed as the second argument.
|
||
|
* @param options Configuration options for the hook. The following properties are supported:
|
||
|
*/
|
||
|
function after(fn?: HookFn, options?: HookOptions): void;
|
||
|
/**
|
||
|
* This function is used to create a hook running
|
||
|
* before each subtest of the current suite.
|
||
|
*
|
||
|
* ```js
|
||
|
* describe('tests', async () => {
|
||
|
* beforeEach(() => console.log('about to run a test'));
|
||
|
* it('is a subtest', () => {
|
||
|
* assert.ok('some relevant assertion here');
|
||
|
* });
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.8.0, v16.18.0
|
||
|
* @param [fn='A no-op function'] The hook function. If the hook uses callbacks, the callback function is passed as the second argument.
|
||
|
* @param options Configuration options for the hook. The following properties are supported:
|
||
|
*/
|
||
|
function beforeEach(fn?: HookFn, options?: HookOptions): void;
|
||
|
/**
|
||
|
* This function is used to create a hook running
|
||
|
* after each subtest of the current test.
|
||
|
*
|
||
|
* ```js
|
||
|
* describe('tests', async () => {
|
||
|
* afterEach(() => console.log('finished running a test'));
|
||
|
* it('is a subtest', () => {
|
||
|
* assert.ok('some relevant assertion here');
|
||
|
* });
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v18.8.0, v16.18.0
|
||
|
* @param [fn='A no-op function'] The hook function. If the hook uses callbacks, the callback function is passed as the second argument.
|
||
|
* @param options Configuration options for the hook. The following properties are supported:
|
||
|
*/
|
||
|
function afterEach(fn?: HookFn, options?: HookOptions): void;
|
||
|
/**
|
||
|
* The hook function. If the hook uses callbacks, the callback function is passed as the
|
||
|
* second argument.
|
||
|
*/
|
||
|
type HookFn = (s: SuiteContext, done: (result?: any) => void) => any;
|
||
|
/**
|
||
|
* Configuration options for hooks.
|
||
|
* @since v18.8.0
|
||
|
*/
|
||
|
interface HookOptions {
|
||
|
/**
|
||
|
* Allows aborting an in-progress hook.
|
||
|
*/
|
||
|
signal?: AbortSignal | undefined;
|
||
|
/**
|
||
|
* A number of milliseconds the hook will fail after. If unspecified, subtests inherit this
|
||
|
* value from their parent.
|
||
|
* @default Infinity
|
||
|
*/
|
||
|
timeout?: number | undefined;
|
||
|
}
|
||
|
interface MockFunctionOptions {
|
||
|
/**
|
||
|
* The number of times that the mock will use the behavior of `implementation`.
|
||
|
* Once the mock function has been called `times` times,
|
||
|
* it will automatically restore the behavior of `original`.
|
||
|
* This value must be an integer greater than zero.
|
||
|
* @default Infinity
|
||
|
*/
|
||
|
times?: number | undefined;
|
||
|
}
|
||
|
interface MockMethodOptions extends MockFunctionOptions {
|
||
|
/**
|
||
|
* If `true`, `object[methodName]` is treated as a getter.
|
||
|
* This option cannot be used with the `setter` option.
|
||
|
*/
|
||
|
getter?: boolean | undefined;
|
||
|
/**
|
||
|
* If `true`, `object[methodName]` is treated as a setter.
|
||
|
* This option cannot be used with the `getter` option.
|
||
|
*/
|
||
|
setter?: boolean | undefined;
|
||
|
}
|
||
|
type Mock<F extends Function> = F & {
|
||
|
mock: MockFunctionContext<F>;
|
||
|
};
|
||
|
type NoOpFunction = (...args: any[]) => undefined;
|
||
|
type FunctionPropertyNames<T> = {
|
||
|
[K in keyof T]: T[K] extends Function ? K : never;
|
||
|
}[keyof T];
|
||
|
/**
|
||
|
* The `MockTracker` class is used to manage mocking functionality. The test runner
|
||
|
* module provides a top level `mock` export which is a `MockTracker` instance.
|
||
|
* Each test also provides its own `MockTracker` instance via the test context's`mock` property.
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
*/
|
||
|
class MockTracker {
|
||
|
/**
|
||
|
* This function is used to create a mock function.
|
||
|
*
|
||
|
* The following example creates a mock function that increments a counter by one
|
||
|
* on each invocation. The `times` option is used to modify the mock behavior such
|
||
|
* that the first two invocations add two to the counter instead of one.
|
||
|
*
|
||
|
* ```js
|
||
|
* test('mocks a counting function', (t) => {
|
||
|
* let cnt = 0;
|
||
|
*
|
||
|
* function addOne() {
|
||
|
* cnt++;
|
||
|
* return cnt;
|
||
|
* }
|
||
|
*
|
||
|
* function addTwo() {
|
||
|
* cnt += 2;
|
||
|
* return cnt;
|
||
|
* }
|
||
|
*
|
||
|
* const fn = t.mock.fn(addOne, addTwo, { times: 2 });
|
||
|
*
|
||
|
* assert.strictEqual(fn(), 2);
|
||
|
* assert.strictEqual(fn(), 4);
|
||
|
* assert.strictEqual(fn(), 5);
|
||
|
* assert.strictEqual(fn(), 6);
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
* @param [original='A no-op function'] An optional function to create a mock on.
|
||
|
* @param implementation An optional function used as the mock implementation for `original`. This is useful for creating mocks that exhibit one behavior for a specified number of calls and
|
||
|
* then restore the behavior of `original`.
|
||
|
* @param options Optional configuration options for the mock function. The following properties are supported:
|
||
|
* @return The mocked function. The mocked function contains a special `mock` property, which is an instance of {@link MockFunctionContext}, and can be used for inspecting and changing the
|
||
|
* behavior of the mocked function.
|
||
|
*/
|
||
|
fn<F extends Function = NoOpFunction>(original?: F, options?: MockFunctionOptions): Mock<F>;
|
||
|
fn<F extends Function = NoOpFunction, Implementation extends Function = F>(
|
||
|
original?: F,
|
||
|
implementation?: Implementation,
|
||
|
options?: MockFunctionOptions,
|
||
|
): Mock<F | Implementation>;
|
||
|
/**
|
||
|
* This function is used to create a mock on an existing object method. The
|
||
|
* following example demonstrates how a mock is created on an existing object
|
||
|
* method.
|
||
|
*
|
||
|
* ```js
|
||
|
* test('spies on an object method', (t) => {
|
||
|
* const number = {
|
||
|
* value: 5,
|
||
|
* subtract(a) {
|
||
|
* return this.value - a;
|
||
|
* },
|
||
|
* };
|
||
|
*
|
||
|
* t.mock.method(number, 'subtract');
|
||
|
* assert.strictEqual(number.subtract.mock.calls.length, 0);
|
||
|
* assert.strictEqual(number.subtract(3), 2);
|
||
|
* assert.strictEqual(number.subtract.mock.calls.length, 1);
|
||
|
*
|
||
|
* const call = number.subtract.mock.calls[0];
|
||
|
*
|
||
|
* assert.deepStrictEqual(call.arguments, [3]);
|
||
|
* assert.strictEqual(call.result, 2);
|
||
|
* assert.strictEqual(call.error, undefined);
|
||
|
* assert.strictEqual(call.target, undefined);
|
||
|
* assert.strictEqual(call.this, number);
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
* @param object The object whose method is being mocked.
|
||
|
* @param methodName The identifier of the method on `object` to mock. If `object[methodName]` is not a function, an error is thrown.
|
||
|
* @param implementation An optional function used as the mock implementation for `object[methodName]`.
|
||
|
* @param options Optional configuration options for the mock method. The following properties are supported:
|
||
|
* @return The mocked method. The mocked method contains a special `mock` property, which is an instance of {@link MockFunctionContext}, and can be used for inspecting and changing the
|
||
|
* behavior of the mocked method.
|
||
|
*/
|
||
|
method<
|
||
|
MockedObject extends object,
|
||
|
MethodName extends FunctionPropertyNames<MockedObject>,
|
||
|
>(
|
||
|
object: MockedObject,
|
||
|
methodName: MethodName,
|
||
|
options?: MockFunctionOptions,
|
||
|
): MockedObject[MethodName] extends Function ? Mock<MockedObject[MethodName]>
|
||
|
: never;
|
||
|
method<
|
||
|
MockedObject extends object,
|
||
|
MethodName extends FunctionPropertyNames<MockedObject>,
|
||
|
Implementation extends Function,
|
||
|
>(
|
||
|
object: MockedObject,
|
||
|
methodName: MethodName,
|
||
|
implementation: Implementation,
|
||
|
options?: MockFunctionOptions,
|
||
|
): MockedObject[MethodName] extends Function ? Mock<MockedObject[MethodName] | Implementation>
|
||
|
: never;
|
||
|
method<MockedObject extends object>(
|
||
|
object: MockedObject,
|
||
|
methodName: keyof MockedObject,
|
||
|
options: MockMethodOptions,
|
||
|
): Mock<Function>;
|
||
|
method<MockedObject extends object>(
|
||
|
object: MockedObject,
|
||
|
methodName: keyof MockedObject,
|
||
|
implementation: Function,
|
||
|
options: MockMethodOptions,
|
||
|
): Mock<Function>;
|
||
|
|
||
|
/**
|
||
|
* This function is syntax sugar for `MockTracker.method` with `options.getter`set to `true`.
|
||
|
* @since v19.3.0, v18.13.0
|
||
|
*/
|
||
|
getter<
|
||
|
MockedObject extends object,
|
||
|
MethodName extends keyof MockedObject,
|
||
|
>(
|
||
|
object: MockedObject,
|
||
|
methodName: MethodName,
|
||
|
options?: MockFunctionOptions,
|
||
|
): Mock<() => MockedObject[MethodName]>;
|
||
|
getter<
|
||
|
MockedObject extends object,
|
||
|
MethodName extends keyof MockedObject,
|
||
|
Implementation extends Function,
|
||
|
>(
|
||
|
object: MockedObject,
|
||
|
methodName: MethodName,
|
||
|
implementation?: Implementation,
|
||
|
options?: MockFunctionOptions,
|
||
|
): Mock<(() => MockedObject[MethodName]) | Implementation>;
|
||
|
/**
|
||
|
* This function is syntax sugar for `MockTracker.method` with `options.setter`set to `true`.
|
||
|
* @since v19.3.0, v18.13.0
|
||
|
*/
|
||
|
setter<
|
||
|
MockedObject extends object,
|
||
|
MethodName extends keyof MockedObject,
|
||
|
>(
|
||
|
object: MockedObject,
|
||
|
methodName: MethodName,
|
||
|
options?: MockFunctionOptions,
|
||
|
): Mock<(value: MockedObject[MethodName]) => void>;
|
||
|
setter<
|
||
|
MockedObject extends object,
|
||
|
MethodName extends keyof MockedObject,
|
||
|
Implementation extends Function,
|
||
|
>(
|
||
|
object: MockedObject,
|
||
|
methodName: MethodName,
|
||
|
implementation?: Implementation,
|
||
|
options?: MockFunctionOptions,
|
||
|
): Mock<((value: MockedObject[MethodName]) => void) | Implementation>;
|
||
|
/**
|
||
|
* This function restores the default behavior of all mocks that were previously
|
||
|
* created by this `MockTracker` and disassociates the mocks from the`MockTracker` instance. Once disassociated, the mocks can still be used, but the`MockTracker` instance can no longer be
|
||
|
* used to reset their behavior or
|
||
|
* otherwise interact with them.
|
||
|
*
|
||
|
* After each test completes, this function is called on the test context's`MockTracker`. If the global `MockTracker` is used extensively, calling this
|
||
|
* function manually is recommended.
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
*/
|
||
|
reset(): void;
|
||
|
/**
|
||
|
* This function restores the default behavior of all mocks that were previously
|
||
|
* created by this `MockTracker`. Unlike `mock.reset()`, `mock.restoreAll()` does
|
||
|
* not disassociate the mocks from the `MockTracker` instance.
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
*/
|
||
|
restoreAll(): void;
|
||
|
timers: MockTimers;
|
||
|
}
|
||
|
const mock: MockTracker;
|
||
|
interface MockFunctionCall<
|
||
|
F extends Function,
|
||
|
ReturnType = F extends (...args: any) => infer T ? T
|
||
|
: F extends abstract new(...args: any) => infer T ? T
|
||
|
: unknown,
|
||
|
Args = F extends (...args: infer Y) => any ? Y
|
||
|
: F extends abstract new(...args: infer Y) => any ? Y
|
||
|
: unknown[],
|
||
|
> {
|
||
|
/**
|
||
|
* An array of the arguments passed to the mock function.
|
||
|
*/
|
||
|
arguments: Args;
|
||
|
/**
|
||
|
* If the mocked function threw then this property contains the thrown value.
|
||
|
*/
|
||
|
error: unknown | undefined;
|
||
|
/**
|
||
|
* The value returned by the mocked function.
|
||
|
*
|
||
|
* If the mocked function threw, it will be `undefined`.
|
||
|
*/
|
||
|
result: ReturnType | undefined;
|
||
|
/**
|
||
|
* An `Error` object whose stack can be used to determine the callsite of the mocked function invocation.
|
||
|
*/
|
||
|
stack: Error;
|
||
|
/**
|
||
|
* If the mocked function is a constructor, this field contains the class being constructed.
|
||
|
* Otherwise this will be `undefined`.
|
||
|
*/
|
||
|
target: F extends abstract new(...args: any) => any ? F : undefined;
|
||
|
/**
|
||
|
* The mocked function's `this` value.
|
||
|
*/
|
||
|
this: unknown;
|
||
|
}
|
||
|
/**
|
||
|
* The `MockFunctionContext` class is used to inspect or manipulate the behavior of
|
||
|
* mocks created via the `MockTracker` APIs.
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
*/
|
||
|
class MockFunctionContext<F extends Function> {
|
||
|
/**
|
||
|
* A getter that returns a copy of the internal array used to track calls to the
|
||
|
* mock. Each entry in the array is an object with the following properties.
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
*/
|
||
|
readonly calls: Array<MockFunctionCall<F>>;
|
||
|
/**
|
||
|
* This function returns the number of times that this mock has been invoked. This
|
||
|
* function is more efficient than checking `ctx.calls.length` because `ctx.calls`is a getter that creates a copy of the internal call tracking array.
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
* @return The number of times that this mock has been invoked.
|
||
|
*/
|
||
|
callCount(): number;
|
||
|
/**
|
||
|
* This function is used to change the behavior of an existing mock.
|
||
|
*
|
||
|
* The following example creates a mock function using `t.mock.fn()`, calls the
|
||
|
* mock function, and then changes the mock implementation to a different function.
|
||
|
*
|
||
|
* ```js
|
||
|
* test('changes a mock behavior', (t) => {
|
||
|
* let cnt = 0;
|
||
|
*
|
||
|
* function addOne() {
|
||
|
* cnt++;
|
||
|
* return cnt;
|
||
|
* }
|
||
|
*
|
||
|
* function addTwo() {
|
||
|
* cnt += 2;
|
||
|
* return cnt;
|
||
|
* }
|
||
|
*
|
||
|
* const fn = t.mock.fn(addOne);
|
||
|
*
|
||
|
* assert.strictEqual(fn(), 1);
|
||
|
* fn.mock.mockImplementation(addTwo);
|
||
|
* assert.strictEqual(fn(), 3);
|
||
|
* assert.strictEqual(fn(), 5);
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
* @param implementation The function to be used as the mock's new implementation.
|
||
|
*/
|
||
|
mockImplementation(implementation: Function): void;
|
||
|
/**
|
||
|
* This function is used to change the behavior of an existing mock for a single
|
||
|
* invocation. Once invocation `onCall` has occurred, the mock will revert to
|
||
|
* whatever behavior it would have used had `mockImplementationOnce()` not been
|
||
|
* called.
|
||
|
*
|
||
|
* The following example creates a mock function using `t.mock.fn()`, calls the
|
||
|
* mock function, changes the mock implementation to a different function for the
|
||
|
* next invocation, and then resumes its previous behavior.
|
||
|
*
|
||
|
* ```js
|
||
|
* test('changes a mock behavior once', (t) => {
|
||
|
* let cnt = 0;
|
||
|
*
|
||
|
* function addOne() {
|
||
|
* cnt++;
|
||
|
* return cnt;
|
||
|
* }
|
||
|
*
|
||
|
* function addTwo() {
|
||
|
* cnt += 2;
|
||
|
* return cnt;
|
||
|
* }
|
||
|
*
|
||
|
* const fn = t.mock.fn(addOne);
|
||
|
*
|
||
|
* assert.strictEqual(fn(), 1);
|
||
|
* fn.mock.mockImplementationOnce(addTwo);
|
||
|
* assert.strictEqual(fn(), 3);
|
||
|
* assert.strictEqual(fn(), 4);
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
* @param implementation The function to be used as the mock's implementation for the invocation number specified by `onCall`.
|
||
|
* @param onCall The invocation number that will use `implementation`. If the specified invocation has already occurred then an exception is thrown.
|
||
|
*/
|
||
|
mockImplementationOnce(implementation: Function, onCall?: number): void;
|
||
|
/**
|
||
|
* Resets the call history of the mock function.
|
||
|
* @since v19.3.0, v18.13.0
|
||
|
*/
|
||
|
resetCalls(): void;
|
||
|
/**
|
||
|
* Resets the implementation of the mock function to its original behavior. The
|
||
|
* mock can still be used after calling this function.
|
||
|
* @since v19.1.0, v18.13.0
|
||
|
*/
|
||
|
restore(): void;
|
||
|
}
|
||
|
type Timer = "setInterval" | "setTimeout" | "setImmediate" | "Date";
|
||
|
|
||
|
interface MockTimersOptions {
|
||
|
apis: Timer[];
|
||
|
now?: number | Date;
|
||
|
}
|
||
|
/**
|
||
|
* Mocking timers is a technique commonly used in software testing to simulate and
|
||
|
* control the behavior of timers, such as `setInterval` and `setTimeout`,
|
||
|
* without actually waiting for the specified time intervals.
|
||
|
*
|
||
|
* The MockTimers API also allows for mocking of the `Date` constructor and
|
||
|
* `setImmediate`/`clearImmediate` functions.
|
||
|
*
|
||
|
* The `MockTracker` provides a top-level `timers` export
|
||
|
* which is a `MockTimers` instance.
|
||
|
* @since v20.4.0
|
||
|
* @experimental
|
||
|
*/
|
||
|
class MockTimers {
|
||
|
/**
|
||
|
* Enables timer mocking for the specified timers.
|
||
|
*
|
||
|
* **Note:** When you enable mocking for a specific timer, its associated
|
||
|
* clear function will also be implicitly mocked.
|
||
|
*
|
||
|
* **Note:** Mocking `Date` will affect the behavior of the mocked timers
|
||
|
* as they use the same internal clock.
|
||
|
*
|
||
|
* Example usage without setting initial time:
|
||
|
*
|
||
|
* ```js
|
||
|
* import { mock } from 'node:test';
|
||
|
* mock.timers.enable({ apis: ['setInterval', 'Date'], now: 1234 });
|
||
|
* ```
|
||
|
*
|
||
|
* The above example enables mocking for the `Date` constructor, `setInterval` timer and
|
||
|
* implicitly mocks the `clearInterval` function. Only the `Date` constructor from `globalThis`,
|
||
|
* `setInterval` and `clearInterval` functions from `node:timers`,`node:timers/promises`, and `globalThis` will be mocked.
|
||
|
*
|
||
|
* Example usage with initial time set
|
||
|
*
|
||
|
* ```js
|
||
|
* import { mock } from 'node:test';
|
||
|
* mock.timers.enable({ apis: ['Date'], now: 1000 });
|
||
|
* ```
|
||
|
*
|
||
|
* Example usage with initial Date object as time set
|
||
|
*
|
||
|
* ```js
|
||
|
* import { mock } from 'node:test';
|
||
|
* mock.timers.enable({ apis: ['Date'], now: new Date() });
|
||
|
* ```
|
||
|
*
|
||
|
* Alternatively, if you call `mock.timers.enable()` without any parameters:
|
||
|
*
|
||
|
* All timers (`'setInterval'`, `'clearInterval'`, `'Date'`, `'setImmediate'`, `'clearImmediate'`, `'setTimeout'`, and `'clearTimeout'`)
|
||
|
* will be mocked.
|
||
|
*
|
||
|
* The `setInterval`, `clearInterval`, `setTimeout`, and `clearTimeout` functions from `node:timers`, `node:timers/promises`,
|
||
|
* and `globalThis` will be mocked.
|
||
|
* The `Date` constructor from `globalThis` will be mocked.
|
||
|
*
|
||
|
* If there is no initial epoch set, the initial date will be based on 0 in the Unix epoch. This is `January 1st, 1970, 00:00:00 UTC`. You can set an initial date by passing a now property to the `.enable()` method. This value will be used as the initial date for the mocked Date object. It can either be a positive integer, or another Date object.
|
||
|
* @since v20.4.0
|
||
|
*/
|
||
|
enable(options?: MockTimersOptions): void;
|
||
|
/**
|
||
|
* You can use the `.setTime()` method to manually move the mocked date to another time. This method only accepts a positive integer.
|
||
|
* Note: This method will execute any mocked timers that are in the past from the new time.
|
||
|
* In the below example we are setting a new time for the mocked date.
|
||
|
* ```js
|
||
|
* import assert from 'node:assert';
|
||
|
* import { test } from 'node:test';
|
||
|
* test('sets the time of a date object', (context) => {
|
||
|
* // Optionally choose what to mock
|
||
|
* context.mock.timers.enable({ apis: ['Date'], now: 100 });
|
||
|
* assert.strictEqual(Date.now(), 100);
|
||
|
* // Advance in time will also advance the date
|
||
|
* context.mock.timers.setTime(1000);
|
||
|
* context.mock.timers.tick(200);
|
||
|
* assert.strictEqual(Date.now(), 1200);
|
||
|
* });
|
||
|
* ```
|
||
|
*/
|
||
|
setTime(time: number): void;
|
||
|
/**
|
||
|
* This function restores the default behavior of all mocks that were previously
|
||
|
* created by this `MockTimers` instance and disassociates the mocks
|
||
|
* from the `MockTracker` instance.
|
||
|
*
|
||
|
* **Note:** After each test completes, this function is called on
|
||
|
* the test context's `MockTracker`.
|
||
|
*
|
||
|
* ```js
|
||
|
* import { mock } from 'node:test';
|
||
|
* mock.timers.reset();
|
||
|
* ```
|
||
|
* @since v20.4.0
|
||
|
*/
|
||
|
reset(): void;
|
||
|
/**
|
||
|
* Advances time for all mocked timers.
|
||
|
*
|
||
|
* **Note:** This diverges from how `setTimeout` in Node.js behaves and accepts
|
||
|
* only positive numbers. In Node.js, `setTimeout` with negative numbers is
|
||
|
* only supported for web compatibility reasons.
|
||
|
*
|
||
|
* The following example mocks a `setTimeout` function and
|
||
|
* by using `.tick` advances in
|
||
|
* time triggering all pending timers.
|
||
|
*
|
||
|
* ```js
|
||
|
* import assert from 'node:assert';
|
||
|
* import { test } from 'node:test';
|
||
|
*
|
||
|
* test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
|
||
|
* const fn = context.mock.fn();
|
||
|
*
|
||
|
* context.mock.timers.enable({ apis: ['setTimeout'] });
|
||
|
*
|
||
|
* setTimeout(fn, 9999);
|
||
|
*
|
||
|
* assert.strictEqual(fn.mock.callCount(), 0);
|
||
|
*
|
||
|
* // Advance in time
|
||
|
* context.mock.timers.tick(9999);
|
||
|
*
|
||
|
* assert.strictEqual(fn.mock.callCount(), 1);
|
||
|
* });
|
||
|
* ```
|
||
|
*
|
||
|
* Alternativelly, the `.tick` function can be called many times
|
||
|
*
|
||
|
* ```js
|
||
|
* import assert from 'node:assert';
|
||
|
* import { test } from 'node:test';
|
||
|
*
|
||
|
* test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
|
||
|
* const fn = context.mock.fn();
|
||
|
* context.mock.timers.enable({ apis: ['setTimeout'] });
|
||
|
* const nineSecs = 9000;
|
||
|
* setTimeout(fn, nineSecs);
|
||
|
*
|
||
|
* const twoSeconds = 3000;
|
||
|
* context.mock.timers.tick(twoSeconds);
|
||
|
* context.mock.timers.tick(twoSeconds);
|
||
|
* context.mock.timers.tick(twoSeconds);
|
||
|
*
|
||
|
* assert.strictEqual(fn.mock.callCount(), 1);
|
||
|
* });
|
||
|
* ```
|
||
|
*
|
||
|
* Advancing time using `.tick` will also advance the time for any `Date` object
|
||
|
* created after the mock was enabled (if `Date` was also set to be mocked).
|
||
|
*
|
||
|
* ```js
|
||
|
* import assert from 'node:assert';
|
||
|
* import { test } from 'node:test';
|
||
|
*
|
||
|
* test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
|
||
|
* const fn = context.mock.fn();
|
||
|
*
|
||
|
* context.mock.timers.enable({ apis: ['setTimeout', 'Date'] });
|
||
|
* setTimeout(fn, 9999);
|
||
|
*
|
||
|
* assert.strictEqual(fn.mock.callCount(), 0);
|
||
|
* assert.strictEqual(Date.now(), 0);
|
||
|
*
|
||
|
* // Advance in time
|
||
|
* context.mock.timers.tick(9999);
|
||
|
* assert.strictEqual(fn.mock.callCount(), 1);
|
||
|
* assert.strictEqual(Date.now(), 9999);
|
||
|
* });
|
||
|
* ```
|
||
|
* @since v20.4.0
|
||
|
*/
|
||
|
tick(milliseconds: number): void;
|
||
|
/**
|
||
|
* Triggers all pending mocked timers immediately. If the `Date` object is also
|
||
|
* mocked, it will also advance the `Date` object to the furthest timer's time.
|
||
|
*
|
||
|
* The example below triggers all pending timers immediately,
|
||
|
* causing them to execute without any delay.
|
||
|
*
|
||
|
* ```js
|
||
|
* import assert from 'node:assert';
|
||
|
* import { test } from 'node:test';
|
||
|
*
|
||
|
* test('runAll functions following the given order', (context) => {
|
||
|
* context.mock.timers.enable({ apis: ['setTimeout', 'Date'] });
|
||
|
* const results = [];
|
||
|
* setTimeout(() => results.push(1), 9999);
|
||
|
*
|
||
|
* // Notice that if both timers have the same timeout,
|
||
|
* // the order of execution is guaranteed
|
||
|
* setTimeout(() => results.push(3), 8888);
|
||
|
* setTimeout(() => results.push(2), 8888);
|
||
|
*
|
||
|
* assert.deepStrictEqual(results, []);
|
||
|
*
|
||
|
* context.mock.timers.runAll();
|
||
|
* assert.deepStrictEqual(results, [3, 2, 1]);
|
||
|
* // The Date object is also advanced to the furthest timer's time
|
||
|
* assert.strictEqual(Date.now(), 9999);
|
||
|
* });
|
||
|
* ```
|
||
|
*
|
||
|
* **Note:** The `runAll()` function is specifically designed for
|
||
|
* triggering timers in the context of timer mocking.
|
||
|
* It does not have any effect on real-time system
|
||
|
* clocks or actual timers outside of the mocking environment.
|
||
|
* @since v20.4.0
|
||
|
*/
|
||
|
runAll(): void;
|
||
|
/**
|
||
|
* Calls {@link MockTimers.reset()}.
|
||
|
*/
|
||
|
[Symbol.dispose](): void;
|
||
|
}
|
||
|
export {
|
||
|
after,
|
||
|
afterEach,
|
||
|
before,
|
||
|
beforeEach,
|
||
|
describe,
|
||
|
it,
|
||
|
Mock,
|
||
|
mock,
|
||
|
only,
|
||
|
run,
|
||
|
skip,
|
||
|
test,
|
||
|
test as default,
|
||
|
todo,
|
||
|
};
|
||
|
}
|
||
|
|
||
|
interface TestLocationInfo {
|
||
|
/**
|
||
|
* The column number where the test is defined, or
|
||
|
* `undefined` if the test was run through the REPL.
|
||
|
*/
|
||
|
column?: number;
|
||
|
/**
|
||
|
* The path of the test file, `undefined` if test is not ran through a file.
|
||
|
*/
|
||
|
file?: string;
|
||
|
/**
|
||
|
* The line number where the test is defined, or
|
||
|
* `undefined` if the test was run through the REPL.
|
||
|
*/
|
||
|
line?: number;
|
||
|
}
|
||
|
interface DiagnosticData extends TestLocationInfo {
|
||
|
/**
|
||
|
* The diagnostic message.
|
||
|
*/
|
||
|
message: string;
|
||
|
/**
|
||
|
* The nesting level of the test.
|
||
|
*/
|
||
|
nesting: number;
|
||
|
}
|
||
|
interface TestFail extends TestLocationInfo {
|
||
|
/**
|
||
|
* Additional execution metadata.
|
||
|
*/
|
||
|
details: {
|
||
|
/**
|
||
|
* The duration of the test in milliseconds.
|
||
|
*/
|
||
|
duration_ms: number;
|
||
|
/**
|
||
|
* The error thrown by the test.
|
||
|
*/
|
||
|
error: Error;
|
||
|
/**
|
||
|
* The type of the test, used to denote whether this is a suite.
|
||
|
* @since 20.0.0, 19.9.0, 18.17.0
|
||
|
*/
|
||
|
type?: "suite";
|
||
|
};
|
||
|
/**
|
||
|
* The test name.
|
||
|
*/
|
||
|
name: string;
|
||
|
/**
|
||
|
* The nesting level of the test.
|
||
|
*/
|
||
|
nesting: number;
|
||
|
/**
|
||
|
* The ordinal number of the test.
|
||
|
*/
|
||
|
testNumber: number;
|
||
|
/**
|
||
|
* Present if `context.todo` is called.
|
||
|
*/
|
||
|
todo?: string | boolean;
|
||
|
/**
|
||
|
* Present if `context.skip` is called.
|
||
|
*/
|
||
|
skip?: string | boolean;
|
||
|
}
|
||
|
interface TestPass extends TestLocationInfo {
|
||
|
/**
|
||
|
* Additional execution metadata.
|
||
|
*/
|
||
|
details: {
|
||
|
/**
|
||
|
* The duration of the test in milliseconds.
|
||
|
*/
|
||
|
duration_ms: number;
|
||
|
/**
|
||
|
* The type of the test, used to denote whether this is a suite.
|
||
|
* @since 20.0.0, 19.9.0, 18.17.0
|
||
|
*/
|
||
|
type?: "suite";
|
||
|
};
|
||
|
/**
|
||
|
* The test name.
|
||
|
*/
|
||
|
name: string;
|
||
|
/**
|
||
|
* The nesting level of the test.
|
||
|
*/
|
||
|
nesting: number;
|
||
|
/**
|
||
|
* The ordinal number of the test.
|
||
|
*/
|
||
|
testNumber: number;
|
||
|
/**
|
||
|
* Present if `context.todo` is called.
|
||
|
*/
|
||
|
todo?: string | boolean;
|
||
|
/**
|
||
|
* Present if `context.skip` is called.
|
||
|
*/
|
||
|
skip?: string | boolean;
|
||
|
}
|
||
|
interface TestPlan extends TestLocationInfo {
|
||
|
/**
|
||
|
* The nesting level of the test.
|
||
|
*/
|
||
|
nesting: number;
|
||
|
/**
|
||
|
* The number of subtests that have ran.
|
||
|
*/
|
||
|
count: number;
|
||
|
}
|
||
|
interface TestStart extends TestLocationInfo {
|
||
|
/**
|
||
|
* The test name.
|
||
|
*/
|
||
|
name: string;
|
||
|
/**
|
||
|
* The nesting level of the test.
|
||
|
*/
|
||
|
nesting: number;
|
||
|
}
|
||
|
interface TestStderr extends TestLocationInfo {
|
||
|
/**
|
||
|
* The message written to `stderr`
|
||
|
*/
|
||
|
message: string;
|
||
|
}
|
||
|
interface TestStdout extends TestLocationInfo {
|
||
|
/**
|
||
|
* The message written to `stdout`
|
||
|
*/
|
||
|
message: string;
|
||
|
}
|
||
|
interface TestEnqueue extends TestLocationInfo {
|
||
|
/**
|
||
|
* The test name
|
||
|
*/
|
||
|
name: string;
|
||
|
/**
|
||
|
* The nesting level of the test.
|
||
|
*/
|
||
|
nesting: number;
|
||
|
}
|
||
|
interface TestDequeue extends TestLocationInfo {
|
||
|
/**
|
||
|
* The test name
|
||
|
*/
|
||
|
name: string;
|
||
|
/**
|
||
|
* The nesting level of the test.
|
||
|
*/
|
||
|
nesting: number;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* The `node:test/reporters` module exposes the builtin-reporters for `node:test`.
|
||
|
* To access it:
|
||
|
*
|
||
|
* ```js
|
||
|
* import test from 'node:test/reporters';
|
||
|
* ```
|
||
|
*
|
||
|
* This module is only available under the `node:` scheme. The following will not
|
||
|
* work:
|
||
|
*
|
||
|
* ```js
|
||
|
* import test from 'test/reporters';
|
||
|
* ```
|
||
|
* @since v19.9.0
|
||
|
* @see [source](https://github.com/nodejs/node/blob/v20.2.0/lib/test/reporters.js)
|
||
|
*/
|
||
|
declare module "node:test/reporters" {
|
||
|
import { Transform, TransformOptions } from "node:stream";
|
||
|
|
||
|
type TestEvent =
|
||
|
| { type: "test:diagnostic"; data: DiagnosticData }
|
||
|
| { type: "test:fail"; data: TestFail }
|
||
|
| { type: "test:pass"; data: TestPass }
|
||
|
| { type: "test:plan"; data: TestPlan }
|
||
|
| { type: "test:start"; data: TestStart }
|
||
|
| { type: "test:stderr"; data: TestStderr }
|
||
|
| { type: "test:stdout"; data: TestStdout }
|
||
|
| { type: "test:enqueue"; data: TestEnqueue }
|
||
|
| { type: "test:dequeue"; data: TestDequeue }
|
||
|
| { type: "test:watch:drained" };
|
||
|
type TestEventGenerator = AsyncGenerator<TestEvent, void>;
|
||
|
|
||
|
/**
|
||
|
* The `dot` reporter outputs the test results in a compact format,
|
||
|
* where each passing test is represented by a `.`,
|
||
|
* and each failing test is represented by a `X`.
|
||
|
*/
|
||
|
function dot(source: TestEventGenerator): AsyncGenerator<"\n" | "." | "X", void>;
|
||
|
/**
|
||
|
* The `tap` reporter outputs the test results in the [TAP](https://testanything.org/) format.
|
||
|
*/
|
||
|
function tap(source: TestEventGenerator): AsyncGenerator<string, void>;
|
||
|
/**
|
||
|
* The `spec` reporter outputs the test results in a human-readable format.
|
||
|
*/
|
||
|
class Spec extends Transform {
|
||
|
constructor();
|
||
|
}
|
||
|
/**
|
||
|
* The `junit` reporter outputs test results in a jUnit XML format
|
||
|
*/
|
||
|
function junit(source: TestEventGenerator): AsyncGenerator<string, void>;
|
||
|
class Lcov extends Transform {
|
||
|
constructor(opts?: TransformOptions);
|
||
|
}
|
||
|
export { dot, junit, Lcov as lcov, Spec as spec, tap, TestEvent };
|
||
|
}
|