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31 lines
914 B
TypeScript
31 lines
914 B
TypeScript
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import { findDuplicates } from './findDuplicates';
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test('should find single duplicates', () => {
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expect(findDuplicates([1, 2, 3, 4, 1])).toEqual([1]);
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expect(findDuplicates(['a', 'b', 'a', 'a'])).toEqual(['a']);
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});
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test('should return an empty array for unique elements', () => {
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expect(findDuplicates(['a', 'b', 'c', 'd'])).toEqual([]);
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});
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test('should handle arrays with all identical elements', () => {
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expect(findDuplicates([1, 1, 1, 1])).toEqual([1]);
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});
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test('should handle multiple duplicates', () => {
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expect(findDuplicates([1, 2, 2, 1])).toEqual(
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expect.arrayContaining([1, 2]),
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);
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});
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test('should handle an empty array', () => {
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expect(findDuplicates([])).toEqual([]);
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});
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test('should handle arrays with boolean values', () => {
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expect(findDuplicates([true, true, false, false, true])).toEqual(
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expect.arrayContaining([true, false]),
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);
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});
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