16 lines
597 B
JavaScript
16 lines
597 B
JavaScript
const expect = require('expect');
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const mask = require('./mask.js');
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test('mask is a Function', () => {
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expect(mask).toBeInstanceOf(Function);
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});
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test('Replaces all but the last num of characters with the specified mask character', () => {
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expect(mask(1234567890)).toBe('******7890');
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});
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test('Replaces all but the last num of characters with the specified mask character', () => {
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expect(mask(1234567890, 3)).toBe('*******890');
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});
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test('Replaces all but the last num of characters with the specified mask character', () => {
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expect(mask(1234567890, -4, '$')).toBe('$$$$567890');
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});
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