test

Author: SimenB

e2e/__tests__/__snapshots__/testEnvironmentRunScript.test.ts.snap

@@ -0,0 +1,8 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`throw error if test env does not have getVmContext 1`] = `
+"
+TypeError: Test environment found at \\"<rootDir>/EnvUsingRunScript.js\\" does not export a \\"getVmContext\\" method, which is mandatory from Jest 27. This method is a replacement for \\"runScript\\".
+
+      at ../../packages/jest-runner/build/index.js:157:45"
+`;

e2e/__tests__/testEnvironmentRunScript.test.ts

@@ -0,0 +1,17 @@
+/**
+ * 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 {resolve} from 'path';
+import runJest from '../runJest';
+
+it('throw error if test env does not have getVmContext', () => {
+  const DIR = resolve(__dirname, '../test-environment-run-script');
+  const {exitCode, stderr} = runJest(DIR);
+
+  expect(stderr.replace(DIR, '<rootDir>')).toMatchSnapshot();
+  expect(exitCode).toBe(1);
+});

e2e/test-environment-run-script/EnvUsingRunScript.js

@@ -0,0 +1,14 @@
+/**
+ * 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.
+ */
+'use strict';
+
+module.exports = class Env {
+  constructor() {
+    this.global = global;
+    this.moduleMocker = {};
+  }
+};

e2e/test-environment-run-script/__tests__/envUsingRunScript.test.js

@@ -0,0 +1,11 @@
+/**
+ * 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.
+ */
+'use strict';
+
+test('dummy', () => {
+  throw new Error('nothing to see here');
+});

e2e/test-environment-run-script/package.json

@@ -0,0 +1,5 @@
+{
+  "jest": {
+    "testEnvironment": "<rootDir>/EnvUsingRunScript.js"
+  }
+}

packages/jest-runner/src/runTest.ts

@@ -24,7 +24,11 @@ import type {Config} from '@jest/types';
 import {getTestEnvironment} from 'jest-config';
 import * as docblock from 'jest-docblock';
 import LeakDetector from 'jest-leak-detector';
-import {formatExecError} from 'jest-message-util';
+import {
+  formatExecError,
+  formatStackTrace,
+  separateMessageFromStack,
+} from 'jest-message-util';
 import type Resolver from 'jest-resolve';
 import type RuntimeClass from 'jest-runtime';
 import {ErrorWithStack, interopRequireDefault, setGlobal} from 'jest-util';
@@ -144,9 +148,20 @@ async function runTestInternal(
   });
 
   if (typeof environment.getVmContext !== 'function') {
-    throw new Error(
+    const originalStack = new TypeError(
       `Test environment found at "${testEnvironment}" does not export a "getVmContext" method, which is mandatory from Jest 27. This method is a replacement for "runScript".`,
+    )
+      .stack!.split('\n')
+      // Remove this file from the stack (jest-message-utils will keep one line)
+      .filter(line => line.indexOf(__filename) === -1)
+      .join('\n');
+
+    const {message, stack} = separateMessageFromStack(originalStack);
+
+    console.error(
+      `\n${message}\n` + formatStackTrace(stack, config, {noStackTrace: false}),
     );
+    process.exit(1);
   }
 
   const leakDetector = config.detectLeaks