20 lines
570 B
JavaScript
20 lines
570 B
JavaScript
const expect = require('expect');
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const converge = require('./converge.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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t.equal(average([1, 2, 3, 4, 5, 6, 7]), 4, 'Produces the average of the array');
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const strangeConcat = converge((a, b) => a + b, [
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x => x.toUpperCase(),
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x => x.toLowerCase()]
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);
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t.equal(strangeConcat('Yodel'), "YODELyodel", 'Produces the strange concatenation');
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