295 lines
7.2 KiB
Plaintext
295 lines
7.2 KiB
Plaintext
|
'use strict';
|
||
|
|
||
|
var defineProperties = require('define-properties');
|
||
|
var test = require('tape');
|
||
|
var callBind = require('call-bind');
|
||
|
var functionsHaveNames = require('functions-have-names')();
|
||
|
var hasStrictMode = require('has-strict-mode')();
|
||
|
var forEach = require('for-each');
|
||
|
var debug = require('object-inspect');
|
||
|
var v = require('es-value-fixtures');
|
||
|
var hasSymbols = require('has-symbols/shams')();
|
||
|
var hasPropertyDescriptors = require('has-property-descriptors')();
|
||
|
var iterate = require('iterate-iterator');
|
||
|
|
||
|
var index = require('../Iterator.prototype.drop');
|
||
|
var impl = require('../Iterator.prototype.drop/implementation');
|
||
|
|
||
|
var fnName = 'drop';
|
||
|
|
||
|
var isEnumerable = Object.prototype.propertyIsEnumerable;
|
||
|
|
||
|
var testIterator = require('./helpers/testIterator');
|
||
|
|
||
|
module.exports = {
|
||
|
tests: function (drop, name, t) {
|
||
|
t['throws'](
|
||
|
function () { return new drop(); }, // eslint-disable-line new-cap
|
||
|
TypeError,
|
||
|
'`' + name + '` itself is not a constructor'
|
||
|
);
|
||
|
|
||
|
forEach(v.primitives.concat(v.objects), function (nonIterator) {
|
||
|
t['throws'](
|
||
|
function () { iterate(drop(nonIterator, 0)); },
|
||
|
TypeError,
|
||
|
debug(nonIterator) + ' is not an Object with a callable `next` method'
|
||
|
);
|
||
|
|
||
|
var badNext = { next: nonIterator };
|
||
|
t['throws'](
|
||
|
function () { iterate(drop(badNext, 0)); },
|
||
|
TypeError,
|
||
|
debug(badNext) + ' is not an Object with a callable `next` method'
|
||
|
);
|
||
|
});
|
||
|
|
||
|
t.test('observable lookups', { skip: !hasPropertyDescriptors }, function (st) {
|
||
|
var effects = [];
|
||
|
|
||
|
var obj = {};
|
||
|
Object.defineProperty(obj, 'next', {
|
||
|
configurable: true,
|
||
|
enumerable: true,
|
||
|
get: function next() {
|
||
|
effects.push('get next');
|
||
|
return function () {
|
||
|
return { done: true, value: undefined };
|
||
|
};
|
||
|
}
|
||
|
});
|
||
|
drop(obj, {
|
||
|
valueOf: function valueOf() {
|
||
|
effects.push('ToNumber limit');
|
||
|
return 0;
|
||
|
}
|
||
|
});
|
||
|
|
||
|
st.deepEqual(effects, [
|
||
|
'ToNumber limit',
|
||
|
'get next'
|
||
|
]);
|
||
|
st.end();
|
||
|
});
|
||
|
|
||
|
var arr = [1, 2, 3];
|
||
|
|
||
|
t.test('actual iteration', { skip: !hasSymbols }, function (st) {
|
||
|
var iterator = callBind(arr[Symbol.iterator], arr);
|
||
|
|
||
|
st['throws'](
|
||
|
function () { drop(iterator(), -3); },
|
||
|
RangeError,
|
||
|
'-3 is not >= 0'
|
||
|
);
|
||
|
|
||
|
st['throws'](
|
||
|
function () { return new drop(iterator()); }, // eslint-disable-line new-cap
|
||
|
TypeError,
|
||
|
'`' + name + '` iterator is not a constructor'
|
||
|
);
|
||
|
st['throws'](
|
||
|
function () { return new drop(iterator(), 0); }, // eslint-disable-line new-cap
|
||
|
TypeError,
|
||
|
'`' + name + '` iterator is not a constructor'
|
||
|
);
|
||
|
|
||
|
testIterator(iterator(), [1, 2, 3], st, 'original');
|
||
|
testIterator(drop(iterator(), 0), [1, 2, 3], st, 'drop 0');
|
||
|
testIterator(drop(iterator(), 1), [2, 3], st, 'drop 1');
|
||
|
testIterator(drop(iterator(), 2), [3], st, 'drop 2');
|
||
|
testIterator(drop(iterator(), 3), [], st, 'drop 3');
|
||
|
testIterator(drop(iterator(), Infinity), [], st, 'drop ∞');
|
||
|
|
||
|
st.end();
|
||
|
});
|
||
|
|
||
|
t.test('262: test/built-ins/Iterator/prototype/drop/get-return-method-throws', { skip: !hasPropertyDescriptors }, function (st) {
|
||
|
var badIterator = {
|
||
|
next: function next() {
|
||
|
return {
|
||
|
done: false,
|
||
|
value: 1
|
||
|
};
|
||
|
}
|
||
|
};
|
||
|
|
||
|
Object.defineProperty(badIterator, 'return', {
|
||
|
configurable: true,
|
||
|
enumerable: true,
|
||
|
get: function () { throw new SyntaxError(); }
|
||
|
});
|
||
|
|
||
|
var iter = drop(badIterator, 1);
|
||
|
iter.next();
|
||
|
|
||
|
st['throws'](
|
||
|
function () { iter['return'](); },
|
||
|
SyntaxError,
|
||
|
'gets the `return` method, whose getter throws'
|
||
|
);
|
||
|
|
||
|
st.end();
|
||
|
});
|
||
|
|
||
|
t.test('262: test/built-ins/Iterator/prototype/drop/return-is-forwarded', function (st) {
|
||
|
var returnCount = 0;
|
||
|
|
||
|
var makeBadIterator = function makeBadIterator() {
|
||
|
return {
|
||
|
next: function next() {
|
||
|
return {
|
||
|
done: false,
|
||
|
value: 1
|
||
|
};
|
||
|
},
|
||
|
'return': function () {
|
||
|
returnCount += 1;
|
||
|
return {};
|
||
|
}
|
||
|
};
|
||
|
};
|
||
|
|
||
|
var iter1 = drop(makeBadIterator(), 0);
|
||
|
st.equal(returnCount, 0, 'iter1, before return()');
|
||
|
iter1['return']();
|
||
|
st.equal(returnCount, 1, 'iter1, after return()');
|
||
|
|
||
|
var iter2 = drop(makeBadIterator(), 1);
|
||
|
st.equal(returnCount, 1, 'iter2, before return()');
|
||
|
iter2['return']();
|
||
|
st.equal(returnCount, 2, 'iter2, after return()');
|
||
|
|
||
|
// 5 drops (i wish i had pipeline)
|
||
|
var iter3 = drop(
|
||
|
drop(
|
||
|
drop(
|
||
|
drop(
|
||
|
drop(
|
||
|
makeBadIterator(),
|
||
|
1
|
||
|
),
|
||
|
1
|
||
|
),
|
||
|
1
|
||
|
),
|
||
|
1
|
||
|
),
|
||
|
1
|
||
|
);
|
||
|
st.equal(returnCount, 2, 'iter3, before return()');
|
||
|
iter3['return']();
|
||
|
st.equal(returnCount, 3, 'iter3, after return()');
|
||
|
|
||
|
st.end();
|
||
|
});
|
||
|
|
||
|
t.test('262: test/built-ins/Iterator/prototype/drop/return-is-not-forwarded-after-exhaustion', { skip: !hasPropertyDescriptors }, function (st) {
|
||
|
var makeBadIterator = function makeBadIterator() {
|
||
|
return {
|
||
|
next: function next() {
|
||
|
return {
|
||
|
done: true,
|
||
|
value: undefined
|
||
|
};
|
||
|
},
|
||
|
'return': function () {
|
||
|
throw new SyntaxError();
|
||
|
}
|
||
|
};
|
||
|
};
|
||
|
|
||
|
var iter1 = drop(makeBadIterator(), 0);
|
||
|
st['throws'](
|
||
|
function () { iter1['return'](); },
|
||
|
SyntaxError,
|
||
|
'iter1, return() throws'
|
||
|
);
|
||
|
iter1.next();
|
||
|
iter1['return']();
|
||
|
|
||
|
var iter2 = drop(makeBadIterator(), 1);
|
||
|
st['throws'](
|
||
|
function () { iter2['return'](); },
|
||
|
SyntaxError,
|
||
|
'iter2, return() throws'
|
||
|
);
|
||
|
iter2.next();
|
||
|
iter2['return']();
|
||
|
|
||
|
// 5 drops (i wish i had pipeline)
|
||
|
var iter3 = drop(
|
||
|
drop(
|
||
|
drop(
|
||
|
drop(
|
||
|
drop(
|
||
|
makeBadIterator(),
|
||
|
1
|
||
|
),
|
||
|
1
|
||
|
),
|
||
|
1
|
||
|
),
|
||
|
1
|
||
|
),
|
||
|
1
|
||
|
);
|
||
|
st['throws'](
|
||
|
function () { iter3['return'](); },
|
||
|
SyntaxError,
|
||
|
'iter3, return() throws'
|
||
|
);
|
||
|
iter3.next();
|
||
|
iter3['return']();
|
||
|
|
||
|
var iter4 = drop(makeBadIterator(), 10);
|
||
|
st['throws'](
|
||
|
function () { iter4['return'](); },
|
||
|
SyntaxError,
|
||
|
'iter4, return() throws'
|
||
|
);
|
||
|
iter4.next();
|
||
|
iter4['return']();
|
||
|
|
||
|
st.end();
|
||
|
});
|
||
|
},
|
||
|
index: function () {
|
||
|
test('Iterator.prototype.' + fnName + ': index', function (t) {
|
||
|
module.exports.tests(index, 'Iterator.prototype.' + fnName, t);
|
||
|
|
||
|
t.end();
|
||
|
});
|
||
|
},
|
||
|
implementation: function () {
|
||
|
test('Iterator.prototype.' + fnName + ': implementation', function (t) {
|
||
|
module.exports.tests(callBind(impl), 'Iterator.prototype.' + fnName, t);
|
||
|
|
||
|
t.end();
|
||
|
});
|
||
|
},
|
||
|
shimmed: function () {
|
||
|
test('Iterator.prototype.' + fnName + ': shimmed', function (t) {
|
||
|
t.test('Function name', { skip: !functionsHaveNames }, function (st) {
|
||
|
st.equal(Iterator.prototype[fnName].name, fnName, 'Iterator#' + fnName + ' has name "' + fnName + '"');
|
||
|
st.end();
|
||
|
});
|
||
|
|
||
|
t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
|
||
|
et.equal(false, isEnumerable.call(Iterator.prototype, fnName), 'Iterator#' + fnName + ' is not enumerable');
|
||
|
et.end();
|
||
|
});
|
||
|
|
||
|
t.test('bad string/this value', { skip: !hasStrictMode }, function (st) {
|
||
|
st['throws'](function () { return Iterator.prototype[fnName].call(undefined, 'a'); }, TypeError, 'undefined is not an object');
|
||
|
st['throws'](function () { return Iterator.prototype[fnName].call(null, 'a'); }, TypeError, 'null is not an object');
|
||
|
st.end();
|
||
|
});
|
||
|
|
||
|
module.exports.tests(callBind(Iterator.prototype[fnName]), 'Iterator.prototype.' + fnName, t);
|
||
|
|
||
|
t.end();
|
||
|
});
|
||
|
}
|
||
|
};
|