Merge branch 'master' of git.hxr.so:yige/js-practice

test/math/perfect-number.test.js

@@ -0,0 +1,6 @@
+import { checkPerfectNumber } from '../../src/math/perfect-number'
+
+test('完美数', () => {
+  expect(checkPerfectNumber(28)).toBe(true)
+  expect(checkPerfectNumber(2)).toBe(false)
+})

test/tree/construct-binary-tree-from-preorder-and-inorder-traversal.test.js

@@ -0,0 +1,5 @@
+import { buildTree } from '../../src/tree/construct-binary-tree-from-preorder-and-inorder-traversal'
+
+test('从前序与中序遍历序列构造二叉树', () => {
+  expect(buildTree([3, 9, 20, 15, 7], [9, 3, 15, 20, 7])).toEqual({ left: { left: null, right: null, val: 9 }, right: { left: { left: null, right: null, val: 15 }, right: { left: null, right: null, val: 7 }, val: 20 }, val: 3 })
+})