test: add tests to cover fix for double title displaying case

src/services/__tests__/MarkdownRenderer.test.ts

@@ -97,4 +97,22 @@ describe('Markdown renderer', () => {
     expect(part.component).toBe(TestComponent);
     expect(part.props).toEqual({ children: ' Test Test ' });
   });
+
+  test('should properly extract title from text', () => {
+    const rawTexts = ['text before\n# Test', 'text before\n  # Test', 'text before\n# Test\n'];
+    rawTexts.forEach(text => {
+      const headings = renderer.extractHeadings(text);
+      expect(headings).toHaveLength(1);
+      expect(headings[0].name).toEqual('Test');
+      expect(headings[0].description).toEqual('');
+    });
+
+    const rawTexts2 = ['# Test \n text after', '# Test \ntext after'];
+    rawTexts2.forEach(text => {
+      const headings = renderer.extractHeadings(text);
+      expect(headings).toHaveLength(1);
+      expect(headings[0].name).toEqual('Test');
+      expect(headings[0].description).toEqual('text after');
+    });
+  });
 });

src/services/__tests__/models/ApiInfo.test.ts

@@ -47,6 +47,30 @@ describe('Models', () => {
       expect(info.summary).toEqual('Test summary\nsome text\n## Heading\n test');
     });
 
+    test('should correctly populate description when 2nd line is started by white space', () => {
+      parser.spec = {
+        openapi: '3.0.0',
+        info: {
+          description: 'text before\n  # Test',
+        },
+      } as any;
+
+      const info = new ApiInfoModel(parser);
+      expect(info.description).toEqual('text before\n');
+    });
+
+    test('should correctly populate description when 2nd line is only white space', () => {
+      parser.spec = {
+        openapi: '3.0.0',
+        info: {
+          description: 'text before\n \n # Test',
+        },
+      } as any;
+
+      const info = new ApiInfoModel(parser);
+      expect(info.description).toEqual('text before\n');
+    });
+
     test('should correctly populate license identifier', () => {
       parser.spec = {
         openapi: '3.1.0',