add unit tests

tests/mocks/mdxeditor.tsx

@@ -0,0 +1,74 @@
+import { forwardRef, useImperativeHandle, type ReactNode } from 'react';
+
+export type MDXEditorMethods = {
+    setMarkdown: (value: string) => void;
+};
+
+export type MDXEditorProps = {
+    markdown: string;
+    onChange?: (value: string) => void;
+    readOnly?: boolean;
+    className?: string;
+    contentEditableClassName?: string;
+    plugins?: unknown[];
+};
+
+export const MDXEditor = forwardRef<MDXEditorMethods, MDXEditorProps>(function MDXEditor(
+    { markdown, onChange, readOnly, className },
+    ref,
+) {
+    useImperativeHandle(
+        ref,
+        () => ({
+            setMarkdown: () => undefined,
+        }),
+        [],
+    );
+
+    if (readOnly) {
+        return (
+            <div data-testid="md-preview" data-class-name={className}>
+                {markdown}
+            </div>
+        );
+    }
+
+    return (
+        <textarea
+            aria-label="Markdown Editor"
+            value={markdown}
+            data-class-name={className}
+            onChange={(event) => onChange?.(event.target.value)}
+        />
+    );
+});
+
+function Control(): ReactNode {
+    return <span />;
+}
+
+function plugin(): Record<string, never> {
+    return {};
+}
+
+export const BlockTypeSelect = Control;
+export const BoldItalicUnderlineToggles = Control;
+export const CodeToggle = Control;
+export const CreateLink = Control;
+export const InsertCodeBlock = Control;
+export const InsertTable = Control;
+export const ListsToggle = Control;
+export const Separator = Control;
+export const UndoRedo = Control;
+
+export const codeBlockPlugin = plugin;
+export const codeMirrorPlugin = plugin;
+export const headingsPlugin = plugin;
+export const linkDialogPlugin = plugin;
+export const linkPlugin = plugin;
+export const listsPlugin = plugin;
+export const markdownShortcutPlugin = plugin;
+export const quotePlugin = plugin;
+export const tablePlugin = plugin;
+export const thematicBreakPlugin = plugin;
+export const toolbarPlugin = plugin;