11 lines
468 B
JavaScript
11 lines
468 B
JavaScript
const expect = require('expect');
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const groupBy = require('./groupBy.js');
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test('groupBy is a Function', () => {
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expect(groupBy).toBeInstanceOf(Function);
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});
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t.deepEqual(groupBy([6.1, 4.2, 6.3], Math.floor), {4: [4.2], 6: [6.1, 6.3]}, "Groups the elements of an array based on the given function");
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t.deepEqual(groupBy(['one', 'two', 'three'], 'length'), {3: ['one', 'two'], 5: ['three']}, "Groups the elements of an array based on the given function");
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