chore(core): normalize directory name

Author: meteorlxy

packages/@vuepress/core/__tests__/__fixtures__/client-files/clientAppEnhance.ts renamed to packages/@vuepress/core/__tests__/__fixtures__/clientFiles/clientAppEnhance.ts

@@ -8,15 +8,15 @@ const app = createApp({
 })
 const clientFile = path.resolve(
   __dirname,
-  '../__fixtures__/client-files/clientAppSetup.ts'
+  '../__fixtures__/clientFiles/clientAppSetup.ts'
 )
 const clientFileNonExistent = path.resolve(
   __dirname,
-  '../__fixtures__/client-files/non-existent.ts'
+  '../__fixtures__/clientFiles/non-existent.ts'
 )
 const clientFiles = [
-  path.resolve(__dirname, '../__fixtures__/client-files/clientAppSetup.ts'),
-  path.resolve(__dirname, '../__fixtures__/client-files/clientAppEnhance.ts'),
+  path.resolve(__dirname, '../__fixtures__/clientFiles/clientAppSetup.ts'),
+  path.resolve(__dirname, '../__fixtures__/clientFiles/clientAppEnhance.ts'),
 ]
 const clientFilesNonExistent = [clientFile, clientFileNonExistent]
 

packages/@vuepress/core/__tests__/__fixtures__/client-files/clientAppSetup.ts renamed to packages/@vuepress/core/__tests__/__fixtures__/clientFiles/clientAppSetup.ts

@@ -3,8 +3,8 @@ import type { SiteData } from '@vuepress/shared'
 import type { BundlerDev, BundlerBuild } from '../bundler'
 import type { Page } from '../page'
 import type { Plugin, PluginOptions, PluginConfig } from '../plugin'
-import type { PluginApi } from '../plugin-api'
-import type { ThemeApi } from '../theme-api'
+import type { PluginApi } from '../pluginApi'
+import type { ThemeApi } from '../themeApi'
 import type { AppOptions } from './options'
 import type { AppDir, AppEnv, AppWriteTemp } from './utils'
 

packages/@vuepress/core/__tests__/plugin-api/normalizeClientFilesHook.spec.ts renamed to packages/@vuepress/core/__tests__/pluginApi/normalizeClientFilesHook.spec.ts

@@ -32,6 +32,6 @@ export * from './app'
 export * from './bundler'
 export * from './page'
 export * from './plugin'
-export * from './plugin-api'
+export * from './pluginApi'
 export * from './theme'
-export * from './theme-api'
+export * from './themeApi'

packages/@vuepress/core/__tests__/plugin-api/normalizeReturnObjectHook.spec.ts renamed to packages/@vuepress/core/__tests__/pluginApi/normalizeReturnObjectHook.spec.ts

@@ -1,5 +1,5 @@
 import type { App } from './app'
-import type { HooksExposed } from './plugin-api'
+import type { HooksExposed } from './pluginApi'
 
 /**
  * Vuepress plugin