tagHandler - Handle strong and em tags + test

__tests__/renderer-spec.tsx

@@ -41,3 +41,15 @@ test('should render plain text with simple Class Component', () => {
 test('should render plain H1 with text', () => {
   expect((render(<h1>abcd</h1>) as string).trim()).toBe('# abcd');
 });
+
+test('should render plain strong with text', () => {
+  expect((render(<strong>abcd</strong>) as string).trim()).toBe('**abcd**');
+});
+
+test('should render plain em with text', () => {
+  expect((render(<em>abcd</em>) as string).trim()).toBe('_abcd_');
+});
+
+test('should render H1 with mixed strong and em text', () => {
+  expect((render(<h1>This is <strong>Hello</strong> <em>World</em></h1>) as string).trim()).toBe('# This is **Hello** _World_');
+});

src/tagHandler.ts

@@ -17,6 +17,13 @@ export default function handleTag(
       newParentASTNode = childASTNode = heading(1);
       break;
 
+    case 'strong':
+      newParentASTNode = childASTNode = strong();
+      break;
+    case 'em':
+      newParentASTNode = childASTNode = emphasis();
+      break;
+
     default:
       newParentASTNode = parentASTNode;
       break;