25 lines
967 B
JavaScript
25 lines
967 B
JavaScript
const expect = require('expect');
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const chunk = require('./chunk.js');
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test('chunk is a Function', () => {
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expect(chunk).toBeInstanceOf(Function);
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});
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t.deepEqual(chunk([1, 2, 3, 4, 5], 2), [[1,2],[3,4],[5]], "chunk([1, 2, 3, 4, 5], 2) returns [[1,2],[3,4],[5]] ");
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t.deepEqual(chunk([]), [], 'chunk([]) returns []');
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t.deepEqual(chunk(123), [], 'chunk(123) returns []');
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t.deepEqual(chunk({ a: 123}), [], 'chunk({ a: 123}) returns []');
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t.deepEqual(chunk('string', 2), [ 'st', 'ri', 'ng' ], 'chunk(string, 2) returns [ st, ri, ng ]');
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t.throws(() => chunk(), 'chunk() throws an error');
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t.throws(() => chunk(undefined), 'chunk(undefined) throws an error');
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t.throws(() => chunk(null), 'chunk(null) throws an error');
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let start = new Date().getTime();
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chunk('This is a string', 2);
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let end = new Date().getTime();
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test('chunk(This is a string, 2) takes less than 2s to run', () => {
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expect((end - start) < 2000).toBeTruthy();
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});
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