test: should extract any content above <!-- more --> as excerpt

Author: billyyyyy3320

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

@@ -113,6 +113,14 @@ describe('markdown page', () => {
     expect(page._content.startsWith('---')).toBe(true)
     expect(page._strippedContent.startsWith('---')).toBe(false)
   })
+
+  test('should extract any content above <!-- more --> as excerpt', async () => {
+    const { relative, filePath } = getDocument('excerpt.md')
+    const markdown = getMarkdown()
+    const page = await setupPage({ filePath, relative }, { markdown })
+
+    expect(page.excerpt).toMatchSnapshot()
+  })
 })
 
 describe('title', () => {
@@ -250,7 +258,6 @@ describe('public api', () => {
 // TODO permalink - driven by global pattern
 // TODO I18n
 // TODO Add a page with explicit content
-// TODO Excerpt
 // TODO SFC
 // TODO Headers
 

packages/@vuepress/core/lib/node/__tests__/prepare/__snapshots__/Page.spec.js.snap

@@ -0,0 +1,6 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`markdown page should extract any content above <!-- more --> as excerpt 1`] = `
+<h1 id="excerpt"><a class="header-anchor" href="#excerpt" aria-hidden="true">#</a> Excerpt</h1>
+<p>Blablabla...</p>
+`;

packages/@vuepress/core/lib/node/__tests__/prepare/fixtures/docs/excerpt.md

@@ -0,0 +1,4 @@
+# Excerpt
+
+Blablabla...
+<!-- more -->