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
17 lines
546 B
JavaScript
17 lines
546 B
JavaScript
const {converge} = require('./_30s.js');
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test('converge is a Function', () => {
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expect(converge).toBeInstanceOf(Function);
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});
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const average = converge((a, b) => a / b, [
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arr => arr.reduce((a, v) => a + v, 0),
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arr => arr.length
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]);
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test('Produces the average of the array', () => {
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expect(average([1, 2, 3, 4, 5, 6, 7])).toBe(4);
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});
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const strangeConcat = converge((a, b) => a + b, [x => x.toUpperCase(), x => x.toLowerCase()]);
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test('Produces the strange concatenation', () => {
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expect(strangeConcat('Yodel')).toBe('YODELyodel');
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});
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