83a6a6ea32
* chore: make aware eslint that we use jest By setting up the jest environment, we no longer need to declare the 'test' global in the configuration. * chore: don't need to import expect, it's a jest environment global * chore: don't need to import expect when creating undefined test
16 lines
525 B
JavaScript
16 lines
525 B
JavaScript
const {everyNth} = require('./_30s.js');
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test('everyNth is a Function', () => {
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expect(everyNth).toBeInstanceOf(Function);
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});
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test('Returns every nth element in an array', () => {
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expect(everyNth([1, 2, 3, 4, 5, 6], 2)).toEqual([2, 4, 6]);
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});
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test('When N is bigger than array size, return nothing', () => {
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expect(everyNth([1, 2, 3, 4], 5)).toEqual([]);
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});
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test('Works with different variable types in the same array', () => {
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expect(everyNth([1, 'two', 3, false, 5, 6.1], 2)).toEqual(['two', false, 6.1]);
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});
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