31 lines
897 B
JavaScript
31 lines
897 B
JavaScript
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import { peakIndexInMountainArray, mountainSequence, findInMountainArray } from '../../src/array/find-in-mountain-array'
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test('山脉数组的峰顶索引', () => {
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expect(peakIndexInMountainArray([0, 1, 0])).toBe(1)
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expect(peakIndexInMountainArray([0, 2, 1, 0])).toBe(1)
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})
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test('山脉序列中的最大值', () => {
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expect(mountainSequence([1, 2, 4, 8, 6, 3])).toBe(8)
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expect(mountainSequence([10, 9, 8, 7])).toBe(10)
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})
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function MountainArray (arr) {
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this.arr = arr
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// @param {number} index
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// @return {number}
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this.get = function (index) {
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return this.arr[index]
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}
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// @return {number}
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this.length = function () {
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return this.arr.length
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}
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};
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test('山脉数组中查找目标值', () => {
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expect(findInMountainArray(3, new MountainArray([1, 2, 3, 4, 5, 3, 1]))).toBe(2)
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expect(findInMountainArray(3, new MountainArray([0, 1, 2, 4, 2, 1]))).toBe(-1)
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})
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