chore: positions of test cases

Author: ulivz

packages/@vuepress/core/__tests__/plugin-api/AsyncOption.spec.js renamed to packages/@vuepress/core/lib/node/__tests__/plugin-api/AsyncOption.spec.js

@@ -1,4 +1,4 @@
-const AsyncOption = require('../../lib/plugin-api/abstract/AsyncOption')
+const AsyncOption = require('../../plugin-api/abstract/AsyncOption')
 
 describe('AsyncOption', () => {
   test('parallelApply', async () => {

packages/@vuepress/core/__tests__/plugin-api/Option.spec.js renamed to packages/@vuepress/core/lib/node/__tests__/plugin-api/Option.spec.js

@@ -1,4 +1,4 @@
-import Option from '../../lib/plugin-api/abstract/Option'
+import Option from '../../plugin-api/abstract/Option'
 
 describe('Option', () => {
   test('key', () => {

packages/@vuepress/core/__tests__/plugin-api/PluginAPI.spec.js renamed to packages/@vuepress/core/lib/node/__tests__/plugin-api/PluginAPI.spec.js

@@ -2,8 +2,8 @@ jest.mock('vuepress-plugin-a')
 jest.mock('vuepress-plugin-b')
 jest.mock('@org/vuepress-plugin-a')
 
-import PluginAPI from '../../lib/plugin-api/index'
-import { PLUGIN_OPTION_MAP } from '../../lib/plugin-api/constants'
+import PluginAPI from '../../plugin-api/index'
+import { PLUGIN_OPTION_MAP } from '../../plugin-api/constants'
 
 describe('Plugin', () => {
   test('registerOption', () => {

packages/@vuepress/core/__tests__/plugin-api/PluginUtil.spec.js renamed to packages/@vuepress/core/lib/node/__tests__/plugin-api/PluginUtil.spec.js

@@ -1,4 +1,4 @@
-import { flattenPlugin } from '../../lib/plugin-api/util'
+import { flattenPlugin } from '../../plugin-api/util'
 
 describe('flattenPlugin', () => {
   test('should hydrate plugin correctly', () => {

packages/@vuepress/core/__tests__/prepare/Page.spec.js renamed to packages/@vuepress/core/lib/node/__tests__/prepare/Page.spec.js

@@ -1,6 +1,6 @@
 const { fs, path } = require('@vuepress/shared-utils')
 const AppContext = require('../../lib/prepare/AppContext')
-const createMarkdown = require('../../../markdown/index')
+const createMarkdown = require('../../../../../markdown/index')
 
 function getAppContext () {
   return new AppContext('.')