33 lines
1.2 KiB
JavaScript
33 lines
1.2 KiB
JavaScript
const expect = require('expect');
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const longestItem = require('./longestItem.js');
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test('longestItem is a Function', () => {
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expect(longestItem).toBeInstanceOf(Function);
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});
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test('Returns the longest object from plain values', () => {
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expect(longestItem('this', 'is', 'a', 'testcase')).toEqual('testcase');
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});
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test('Returns the longest object from a spread array', () => {
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expect(longestItem(...['a', 'ab', 'abc'])).toEqual('abc');
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});
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test('Returns the longest object from mixed input', () => {
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expect(longestItem(...['a', 'ab', 'abc'],'abcd')).toEqual('abcd');
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});
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test('Returns the longest array', () => {
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expect(longestItem([1, 2, 3], [1, 2], [1, 2, 3, 4, 5])).toEqual([1, 2, 3, 4, 5]);
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});
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test('Returns the longest object when comparing arrays and strings', () => {
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expect(longestItem([1, 2, 3], 'foobar')).toEqual('foobar');
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});
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test('Returns undefined without any input', () => {
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expect(longestItem()).toEqual(undefined);
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});
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test('Returns first found of all similar', () => {
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expect(longestItem('a','b','c')).toEqual('a');
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});
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test('Throws TypeError if all inputs are undefined', () => {
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expect(() => {
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longestItem(undefined,undefined);
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}).toThrow(TypeError);
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});
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