30 lines
703 B
JavaScript
30 lines
703 B
JavaScript
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import {
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reversePairs,
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merge,
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mergeSort,
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resetCount
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} from '../../src/array/reverse-pairs'
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describe('逆序对', () => {
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beforeEach(() => {
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resetCount()
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})
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test('归并排序 - 合并左右', () => {
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expect(merge([7], [5])).toEqual([5, 7])
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expect(merge([2], [3])).toEqual([2, 3])
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expect(merge([2, 3], [4, 5])).toEqual([2, 3, 4, 5])
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})
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test('归并排序', () => {
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expect(mergeSort([2, 4, 3, 5])).toEqual([2, 3, 4, 5])
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expect(mergeSort([2, 4, 3, 0])).toEqual([0, 2, 3, 4])
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})
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test('逆序对', () => {
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expect(reversePairs([7, 5, 6, 4])).toBe(5)
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expect(reversePairs([2, 4, 1, 3, 5])).toBe(3)
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expect(reversePairs([1, 2, 3, 4])).toBe(0)
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})
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})
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