19 lines
446 B
JavaScript
19 lines
446 B
JavaScript
const expect = require('expect');
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const findLastKey = require('./findLastKey.js');
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test('findLastKey is a Function', () => {
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expect(findLastKey).toBeInstanceOf(Function);
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});
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test('eturns the appropriate key', () => {
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expect(
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findLastKey(
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{
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barney: { age: 36, active: true },
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fred: { age: 40, active: false },
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pebbles: { age: 1, active: true }
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},
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o => o['active']
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)
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).toBe('pebbles');
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});
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