/
esnext.iterator.drop.js
23 lines (19 loc) · 1.04 KB
/
esnext.iterator.drop.js
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import { createIterator } from '../helpers/helpers';
QUnit.test('Iterator#drop', assert => {
const { drop } = Iterator.prototype;
assert.isFunction(drop);
assert.arity(drop, 1);
assert.name(drop, 'drop');
assert.looksNative(drop);
assert.nonEnumerable(Iterator.prototype, 'drop');
assert.arrayEqual(drop.call(createIterator([1, 2, 3]), 1).toArray(), [2, 3], 'basic functionality');
assert.arrayEqual(drop.call(createIterator([1, 2, 3]), 1.5).toArray(), [2, 3], 'float');
assert.arrayEqual(drop.call(createIterator([1, 2, 3]), 4).toArray(), [], 'big');
assert.arrayEqual(drop.call(createIterator([1, 2, 3]), 0).toArray(), [1, 2, 3], 'zero');
assert.throws(() => drop.call(undefined, 1), TypeError);
assert.throws(() => drop.call(null, 1), TypeError);
assert.throws(() => drop.call({}, 1), TypeError);
assert.throws(() => drop.call([], 1), TypeError);
assert.throws(() => drop.call(createIterator([1, 2, 3]), -1), RangeError, 'negative');
assert.throws(() => drop.call(createIterator([1, 2, 3]), NaN), RangeError, 'NaN');
});