add esm testrunner e2e test

e2e/__tests__/transform.test.ts

@@ -294,4 +294,20 @@ onNodeVersions('^12.17.0 || >=13.2.0', () => {
       expect(json.numPassedTests).toBe(1);
     });
   });
+
+  describe('transform-esm-testrunner', () => {
+    const dir = path.resolve(
+      __dirname,
+      '../transform/transform-esm-testrunner',
+    );
+    test('runs test with native ESM', () => {
+      const {json, stderr} = runWithJson(dir, ['--no-cache'], {
+        nodeOptions: '--experimental-vm-modules',
+      });
+
+      expect(stderr).toMatch(/PASS/);
+      expect(json.success).toBe(true);
+      expect(json.numPassedTests).toBe(1);
+    });
+  });
 });

e2e/transform/transform-esm-testrunner/__tests__/add.test.js

@@ -0,0 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+it('should add two numbers', () => {
+  expect(1 + 1).toBe(2);
+});

e2e/transform/transform-esm-testrunner/package.json

@@ -0,0 +1,7 @@
+{
+  "type": "module",
+  "jest": {
+    "rootDir": "./",
+    "testRunner": "<rootDir>/test-runner.mjs"
+  }
+}

e2e/transform/transform-esm-testrunner/test-runner.mjs

@@ -0,0 +1,33 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+import {createEmptyTestResult} from '@jest/test-result';
+
+export default async function testRunner(
+  globalConfig,
+  config,
+  environment,
+  runtime,
+  testPath,
+) {
+  return {
+    ...createEmptyTestResult(),
+    numPassingTests: 1,
+    testFilePath: testPath,
+    testResults: [
+      {
+        ancestorTitles: [],
+        duration: 2,
+        failureMessages: [],
+        fullName: 'sample test',
+        location: null,
+        numPassingAsserts: 1,
+        status: 'passed',
+        title: 'sample test',
+      },
+    ],
+  };
+}