Remove refs to markdown_processing_examples in unit tests

- This helper is for the integration tests
- Lets let the unit tests define their own
  test values
- https://gitlab.com/gitlab-org/gitlab/-/merge_requests/68671#note_656533563

spec/frontend/content_editor/extensions/attachment_spec.js

@@ -7,9 +7,17 @@ import Image from '~/content_editor/extensions/image';
 import Link from '~/content_editor/extensions/link';
 import Loading from '~/content_editor/extensions/loading';
 import httpStatus from '~/lib/utils/http_status';
-import { loadMarkdownApiResult } from '../markdown_processing_examples';
 import { createTestEditor, createDocBuilder } from '../test_utils';
 
+const PROJECT_WIKI_ATTACHMENT_IMAGE_HTML = `<p data-sourcepos="1:1-1:27" dir="auto">
+  <a class="no-attachment-icon" href="/group1/project1/-/wikis/test-file.png" target="_blank" rel="noopener noreferrer" data-canonical-src="test-file.png">
+    <img alt="test-file" class="lazy" data-src="/group1/project1/-/wikis/test-file.png" data-canonical-src="test-file.png">
+  </a>
+</p>`;
+const PROJECT_WIKI_ATTACHMENT_LINK_HTML = `<p data-sourcepos="1:1-1:26" dir="auto">
+  <a href="/group1/project1/-/wikis/test-file.zip" data-canonical-src="test-file.zip">test-file</a>
+</p>`;
+
 describe('content_editor/extensions/attachment', () => {
   let tiptapEditor;
   let eq;
@@ -76,7 +84,7 @@ describe('content_editor/extensions/attachment', () => {
       const base64EncodedFile = 'data:image/png;base64,Zm9v';
 
       beforeEach(() => {
-        renderMarkdown.mockResolvedValue(loadMarkdownApiResult('project_wiki_attachment_image'));
+        renderMarkdown.mockResolvedValue(PROJECT_WIKI_ATTACHMENT_IMAGE_HTML);
       });
 
       describe('when uploading succeeds', () => {
@@ -151,7 +159,7 @@ describe('content_editor/extensions/attachment', () => {
     });
 
     describe('when the file has a zip (or any other attachment) mime type', () => {
-      const markdownApiResult = loadMarkdownApiResult('project_wiki_attachment_link');
+      const markdownApiResult = PROJECT_WIKI_ATTACHMENT_LINK_HTML;
 
       beforeEach(() => {
         renderMarkdown.mockResolvedValue(markdownApiResult);

spec/frontend/content_editor/extensions/code_block_highlight_spec.js

 import CodeBlockHighlight from '~/content_editor/extensions/code_block_highlight';
-import { loadMarkdownApiResult } from '../markdown_processing_examples';
 import { createTestEditor } from '../test_utils';
 
+const CODE_BLOCK_HTML = `<pre class="code highlight js-syntax-highlight language-javascript" lang="javascript" v-pre="true">
+  <code>
+    <span id="LC1" class="line" lang="javascript">
+      <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">'</span><span class="s1">hello world</span><span class="dl">'</span><span class="p">)</span>
+    </span>
+  </code>
+</pre>`;
+
 describe('content_editor/extensions/code_block_highlight', () => {
-  let codeBlockHtmlFixture;
   let parsedCodeBlockHtmlFixture;
   let tiptapEditor;
 
@@ -12,10 +18,9 @@ describe('content_editor/extensions/code_block_highlight', () => {
 
   beforeEach(() => {
     tiptapEditor = createTestEditor({ extensions: [CodeBlockHighlight] });
-    codeBlockHtmlFixture = loadMarkdownApiResult('code_block');
-    parsedCodeBlockHtmlFixture = parseHTML(codeBlockHtmlFixture);
+    parsedCodeBlockHtmlFixture = parseHTML(CODE_BLOCK_HTML);
 
-    tiptapEditor.commands.setContent(codeBlockHtmlFixture);
+    tiptapEditor.commands.setContent(CODE_BLOCK_HTML);
   });
 
   it('extracts language and params attributes from Markdown API output', () => {

spec/frontend/content_editor/services/markdown_sourcemap_spec.js

@@ -4,9 +4,20 @@ import ListItem from '~/content_editor/extensions/list_item';
 import Paragraph from '~/content_editor/extensions/paragraph';
 import markdownSerializer from '~/content_editor/services/markdown_serializer';
 import { getMarkdownSource } from '~/content_editor/services/markdown_sourcemap';
-import { loadMarkdownApiResult, loadMarkdownApiExample } from '../markdown_processing_examples';
 import { createTestEditor, createDocBuilder } from '../test_utils';
 
+const BULLET_LIST_MARKDOWN = `+ list item 1
++ list item 2
+  - embedded list item 3`;
+const BULLET_LIST_HTML = `<ul data-sourcepos="1:1-3:24" dir="auto">
+  <li data-sourcepos="1:1-1:13">list item 1</li>
+  <li data-sourcepos="2:1-3:24">list item 2
+    <ul data-sourcepos="3:3-3:24">
+      <li data-sourcepos="3:3-3:24">embedded list item 3</li>
+    </ul>
+  </li>
+</ul>`;
+
 const SourcemapExtension = Extension.create({
   // lets add `source` attribute to every element using `getMarkdownSource`
   addGlobalAttributes() {
@@ -44,11 +55,11 @@ const {
 describe('content_editor/services/markdown_sourcemap', () => {
   it('gets markdown source for a rendered HTML element', async () => {
     const deserialized = await markdownSerializer({
-      render: () => loadMarkdownApiResult('bullet_list_style_3'),
+      render: () => BULLET_LIST_HTML,
       serializerConfig: {},
     }).deserialize({
       schema: tiptapEditor.schema,
-      content: loadMarkdownApiExample('bullet_list_style_3'),
+      content: BULLET_LIST_MARKDOWN,
     });
 
     const expected = doc(