test: add test for parseHTML

Author: SettingDust

src/utilities.ts

@@ -218,10 +218,12 @@ export function getChildNodes(node: HtmlNode | Node): (Node | HtmlNode)[] {
   }
 }
 
+/* istanbul ignore next */
 export function perfStart(label: string) {
   if (process.env.LOG_PERF) console.time(label);
 }
 
+/* istanbul ignore next */
 export function perfStop(label: string) {
   if (process.env.LOG_PERF) console.timeEnd(label);
 }

test/e2e.test.ts

@@ -0,0 +1,26 @@
+import { parseHTML } from '../src/utilities';
+import { defaultOptions } from '../src/config';
+import { DOMParser } from 'linkedom';
+
+
+describe('parseHTML', () => {
+  test('should parse HTML with native parser in browser', () => {
+    __IS_BROWSER__ = true;
+    globalThis.DOMParser = <typeof globalThis.DOMParser>DOMParser;
+    const html = '<div>test</div>';
+    const parsedHtml = parseHTML(html, { ...defaultOptions, preferNativeParser: true });
+    expect(parsedHtml).toBeDefined();
+    __IS_BROWSER__ = false;
+    globalThis.DOMParser = <typeof globalThis.DOMParser><unknown>undefined;
+  });
+  test('should parse HTML in node when preferNativeParser is true', () => { // This test fails
+    const html = '<div>test</div>';
+    const parsedHtml = parseHTML(html, { ...defaultOptions, preferNativeParser: true });
+    expect(parsedHtml).toBeDefined();
+  });
+  test('should parse HTML in node when preferNativeParser is false', () => {
+    const html = '<div>test</div>';
+    const parsedHtml = parseHTML(html, defaultOptions);
+    expect(parsedHtml).toBeDefined();
+  });
+});