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
20 lines
640 B
JavaScript
20 lines
640 B
JavaScript
const {mapString} = require('./_30s.js');
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test('mapString is a Function', () => {
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expect(mapString).toBeInstanceOf(Function);
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});
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test('mapString returns a capitalized string', () => {
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expect(mapString('test', c => c.toUpperCase())).toBe('TEST');
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});
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const indexMapper = (c, i) => `${c}[${i}]`;
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test('mapString can deal with indexes', () => {
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expect(mapString('test', indexMapper)).toBe('t[0]e[1]s[2]t[3]');
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});
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const fullStringMapper = (c, i, str) => `{${str}}${c}[${i}]`;
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test('mapString can deal with the full string', () => {
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expect(mapString('test', fullStringMapper)).toBe('{test}t[0]{test}e[1]{test}s[2]{test}t[3]');
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});
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