test(core): add unit tests for page

Author: meteorlxy

packages/@vuepress/core/__tests__/page/resolvePageHtmlInfo.spec.ts

@@ -17,16 +17,16 @@ const testCases: [string, string][] = [
 
 describe('core > page > resolvePageHtmlInfo', () => {
   describe('should resolve page html file path correctly', () => {
-    testCases.forEach(([pagePath, htmlFilePathRelative]) => {
+    testCases.forEach(([source, expected]) => {
       it(JSON.stringify(source), () => {
         expect(
           resolvePageHtmlInfo({
             app,
-            path: pagePath,
+            path: source,
           })
         ).toEqual({
-          htmlFilePath: app.dir.dest(htmlFilePathRelative),
-          htmlFilePathRelative,
+          htmlFilePath: app.dir.dest(expected),
+          htmlFilePathRelative: expected,
         })
       })
     })

packages/@vuepress/core/__tests__/page/resolvePageLang.spec.ts

@@ -0,0 +1,59 @@
+import { createApp, resolvePageLang } from '@vuepress/core'
+import { path } from '@vuepress/utils'
+
+const source = path.resolve(__dirname, 'fake-source')
+const app = createApp({
+  source,
+  lang: 'site-lang',
+  locales: {
+    '/': {
+      lang: 'locales-lang',
+    },
+  },
+})
+
+describe('core > page > resolvePageLang', () => {
+  it('should use frontmatter lang', () => {
+    const lang = resolvePageLang({
+      app,
+      frontmatter: {
+        lang: 'frontmatter-lang',
+      },
+      pathLocale: '/',
+    })
+
+    expect(lang).toBe('frontmatter-lang')
+  })
+
+  it('should use locales lang 1', () => {
+    const lang = resolvePageLang({
+      app,
+      frontmatter: {
+        lang: '',
+      },
+      pathLocale: '/',
+    })
+
+    expect(lang).toBe('locales-lang')
+  })
+
+  it('should use locales lang 2', () => {
+    const lang = resolvePageLang({
+      app,
+      frontmatter: {},
+      pathLocale: '/',
+    })
+
+    expect(lang).toBe('locales-lang')
+  })
+
+  it('should use site lang', () => {
+    const lang = resolvePageLang({
+      app,
+      frontmatter: {},
+      pathLocale: '/foo/',
+    })
+
+    expect(lang).toBe('site-lang')
+  })
+})