9 lines
280 B
JavaScript
9 lines
280 B
JavaScript
const {frequencies} = require('./_30s.js');
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test('frequencies is a Function', () => {
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expect(frequencies).toBeInstanceOf(Function);
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});
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test('returns the appropriate object', () => {
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expect(frequencies(['a', 'b', 'a', 'c', 'a', 'a', 'b'])).toEqual({ a: 4, b: 2, c: 1 });
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});
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