add: 验证回文字符串 Ⅱ

test/array/maximum-product-subarray.test.js

@@ -0,0 +1,6 @@
+import { maxProduct } from '../../src/array/maximum-product-subarray'
+
+test('', () => {
+  expect(maxProduct([2, 3, -2, 4])).toBe(6)
+  expect(maxProduct([-2, 0, -1])).toBe(0)
+})

test/graphs/course-schedule-ii.test.js

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+import { findOrder } from '../../src/graphs/course-schedule-ii'
+
+test('课程表 II', () => {
+  expect(findOrder(2, [[1, 0]])).toEqual([0, 1])
+  expect(findOrder(4, [[1, 0], [2, 0], [3, 1], [3, 2]])).toEqual([0, 1, 2, 3])
+})

test/string/valid-palindrome-ii.test.js

@@ -0,0 +1,8 @@
+import { validPalindrome } from '../../src/string/valid-palindrome-ii'
+
+test('验证回文字符串 Ⅱ', () => {
+  expect(validPalindrome('aba')).toBe(true)
+  expect(validPalindrome('abba')).toBe(true)
+  expect(validPalindrome('abca')).toBe(true)
+  expect(validPalindrome('abcda')).toBe(false)
+})