fix: Move content into to frontend directory

Doing this BEFORE the merge prevents a lot of merge conflicts.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/src/extensions/extra-integrations/vimeo/replace-legacy-vimeo-short-code.test.ts

@@ -0,0 +1,46 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import MarkdownIt from 'markdown-it'
+import { replaceLegacyVimeoShortCodeMarkdownItPlugin } from './replace-legacy-vimeo-short-code'
+
+describe('Replace legacy youtube short codes', () => {
+  let markdownIt: MarkdownIt
+
+  beforeEach(() => {
+    markdownIt = new MarkdownIt('default', {
+      html: false,
+      breaks: true,
+      langPrefix: '',
+      typographer: true
+    })
+    markdownIt.use(replaceLegacyVimeoShortCodeMarkdownItPlugin)
+  })
+
+  it('detects a valid legacy youtube short code', () => {
+    expect(markdownIt.renderInline('{%vimeo 12312312312 %}')).toBe('<app-vimeo id="12312312312"></app-vimeo>')
+  })
+
+  it("won't detect an empty string", () => {
+    const code = '{%vimeo %}'
+    expect(markdownIt.renderInline(code)).toBe(code)
+  })
+
+  it("won't detect letters", () => {
+    const code = '{%vimeo 123123a2311 %}'
+    expect(markdownIt.renderInline(code)).toBe(code)
+  })
+
+  it("won't detect an invalid(to short) youtube id", () => {
+    const code = '{%vimeo 1 %}'
+    expect(markdownIt.renderInline(code)).toBe(code)
+  })
+
+  it("won't detect an invalid(to long) youtube id", () => {
+    const code = '{%vimeo 111111111111111111111111111111111 %}'
+    expect(markdownIt.renderInline(code)).toBe(code)
+  })
+})