test

Author: Xstoudi

test/sequential/test-watch-mode.mjs

@@ -884,4 +884,51 @@ process.on('message', (message) => {
       await done();
     }
   });
+
+  it('should watch changes even when there is syntax errors during esm loading', async () => {
+    // Create initial file with valid code
+    const initialContent = `console.log('hello, world');`;
+    const file = createTmpFile(initialContent, '.mjs');
+
+    const { done, restart } = runInBackground({
+      args: ['--watch', file],
+      completed: 'Completed running',
+      shouldFail: true,
+    });
+
+    try {
+      const { stdout, stderr } = await restart();
+      assert.strictEqual(stderr, '');
+      assert.deepStrictEqual(stdout, [
+        'hello, world',
+        `Completed running ${inspect(file)}. Waiting for file changes before restarting...`,
+      ])
+
+      // Update file with syntax error
+      const syntaxErrorContent = `console.log('hello, wor`;
+      writeFileSync(file, syntaxErrorContent);
+
+      // Wait for the failed restart
+      const { stderr: stderr2, stdout: stdout2 } = await restart();
+      assert.match(stderr2, /SyntaxError: Invalid or unexpected token/);
+      assert.deepStrictEqual(stdout2, [
+        `Restarting ${inspect(file)}`,
+        `Failed running ${inspect(file)}. Waiting for file changes before restarting...`,
+      ])
+
+      writeFileSync(file, `console.log('hello again, world');`);
+
+      const { stderr: stderr3, stdout: stdout3 } = await restart();
+
+      // Verify it recovered and ran successfully
+      assert.strictEqual(stderr3, '');
+      assert.deepStrictEqual(stdout3, [
+        `Restarting ${inspect(file)}`,
+        'hello again, world',
+        `Completed running ${inspect(file)}. Waiting for file changes before restarting...`,
+      ]);
+    } finally {
+      await done();
+    }
+  });
 });