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diff --git a/spec/frontend/vue_shared/components/rich_content_editor/rich_content_editor_integration_spec.js b/spec/frontend/vue_shared/components/rich_content_editor/rich_content_editor_integration_spec.js
new file mode 100644
index 00000000000..b9b93b274d2
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+++ b/spec/frontend/vue_shared/components/rich_content_editor/rich_content_editor_integration_spec.js
@@ -0,0 +1,69 @@
+import Editor from '@toast-ui/editor';
+import { registerHTMLToMarkdownRenderer } from '~/vue_shared/components/rich_content_editor/services/editor_service';
+import buildMarkdownToHTMLRenderer from '~/vue_shared/components/rich_content_editor/services/build_custom_renderer';
+
+describe('vue_shared/components/rich_content_editor', () => {
+  let editor;
+
+  const buildEditor = () => {
+    editor = new Editor({
+      el: document.body,
+      customHTMLRenderer: buildMarkdownToHTMLRenderer(),
+    });
+
+    registerHTMLToMarkdownRenderer(editor);
+  };
+
+  beforeEach(() => {
+    buildEditor();
+  });
+
+  describe('HTML to Markdown', () => {
+    it('uses "-" character list marker in unordered lists', () => {
+      editor.setHtml('<ul><li>List item 1</li><li>List item 2</li></ul>');
+
+      const markdown = editor.getMarkdown();
+
+      expect(markdown).toBe('- List item 1\n- List item 2');
+    });
+
+    it('does not increment the list marker in ordered lists', () => {
+      editor.setHtml('<ol><li>List item 1</li><li>List item 2</li></ol>');
+
+      const markdown = editor.getMarkdown();
+
+      expect(markdown).toBe('1. List item 1\n1. List item 2');
+    });
+
+    it('indents lists using four spaces', () => {
+      editor.setHtml('<ul><li>List item 1</li><ul><li>List item 2</li></ul></ul>');
+
+      const markdown = editor.getMarkdown();
+
+      expect(markdown).toBe('- List item 1\n    - List item 2');
+    });
+
+    it('uses * for strong and _ for emphasis text', () => {
+      editor.setHtml('<strong>strong text</strong><i>emphasis text</i>');
+
+      const markdown = editor.getMarkdown();
+
+      expect(markdown).toBe('**strong text**_emphasis text_');
+    });
+  });
+
+  describe('Markdown to HTML', () => {
+    it.each`
+      input                                 | output
+      ${'markdown with _emphasized\ntext_'} | ${'<p>markdown with <em>emphasized text</em></p>\n'}
+      ${'markdown with **strong\ntext**'}   | ${'<p>markdown with <strong>strong text</strong></p>\n'}
+    `(
+      'does not transform softbreaks inside (_) and strong (**) nodes into <br/> tags',
+      ({ input, output }) => {
+        editor.setMarkdown(input);
+
+        expect(editor.getHtml()).toBe(output);
+      },
+    );
+  });
+});