Work around Jest environment resolving bug (facebook#4247)

Author: gaearon

packages/react-scripts/package.json

@@ -56,6 +56,7 @@
  "promise": "8.0.1",
  "raf": "3.4.0",
  "react-dev-utils": "^5.0.0",
+ "resolve": "1.6.0",
  "style-loader": "0.19.1",
  "svgr": "1.8.1",
  "sw-precache-webpack-plugin": "0.11.4",

packages/react-scripts/scripts/test.js

@@ -31,7 +31,7 @@ if (process.env.SKIP_PREFLIGHT_CHECK !== 'true') {
 // @remove-on-eject-end
 
 const jest = require('jest');
-const argv = process.argv.slice(2);
+let argv = process.argv.slice(2);
 
 // Watch unless on CI, in coverage mode, or explicitly running all tests
 if (
@@ -57,5 +57,59 @@ argv.push(
  )
  )
 );
+
+// This is a very dirty workaround for https://github.com/facebook/jest/issues/5913.
+// We're trying to resolve the environment ourselves because Jest does it incorrectly.
+// TODO: remove this (and the `resolve` dependency) as soon as it's fixed in Jest.
+const resolve = require('resolve');
+function resolveJestDefaultEnvironment(name) {
+ const jestDir = path.dirname(
+ resolve.sync('jest', {
+ basedir: __dirname,
+ })
+ );
+ const jestCLIDir = path.dirname(
+ resolve.sync('jest-cli', {
+ basedir: jestDir,
+ })
+ );
+ const jestConfigDir = path.dirname(
+ resolve.sync('jest-config', {
+ basedir: jestCLIDir,
+ })
+ );
+ return resolve.sync(name, {
+ basedir: jestConfigDir,
+ });
+}
+let cleanArgv = [];
+let env = 'node';
+let next;
+do {
+ next = argv.shift();
+ if (next === '--env') {
+ env = argv.shift();
+ } else if (next.indexOf('--env=') === 0) {
+ env = next.substring('--env='.length);
+ } else {
+ cleanArgv.push(next);
+ }
+} while (argv.length > 0);
+argv = cleanArgv;
+let resolvedEnv;
+try {
+ resolvedEnv = resolveJestDefaultEnvironment(`jest-environment-${env}`);
+} catch (e) {
+ // ignore
+}
+if (!resolvedEnv) {
+ try {
+ resolvedEnv = resolveJestDefaultEnvironment(env);
+ } catch (e) {
+ // ignore
+ }
+}
+const testEnvironment = resolvedEnv || env;
+argv.push('--env', testEnvironment);
 // @remove-on-eject-end
 jest.run(argv);