tests: add tests for md renderer

src/services/__tests__/MarkdownRenderer.test.ts

@@ -0,0 +1,21 @@
+import { MarkdownRenderer } from '../MarkdownRenderer';
+
+describe('Markdown renderer', () => {
+  let renderer: MarkdownRenderer;
+  beforeEach(() => {
+    renderer = new MarkdownRenderer();
+  });
+
+  test('should return a level-1 heading even though only level-2 is present', () => {
+    renderer.renderMd('## Sub Intro', false);
+    expect(Object.keys(renderer.headings)).toHaveLength(1);
+    expect(renderer.headings[0].name).toEqual('Sub Intro');
+  });
+  test('should return a level-2 heading as a child of level-1', () => {
+    renderer.renderMd('# Introduction \n ## Sub Intro', false);
+    expect(renderer.headings).toHaveLength(1);
+    expect(renderer.headings[0].name).toEqual('Introduction');
+    expect(renderer.headings[0].items).toBeDefined();
+    expect(renderer.headings[0].items).toHaveLength(1);
+  });
+});