Add an option to spawn command in a shell

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## master
 
+* `[jest-editor-support]` Add option to spawn command in shell ([#5340](https://github.com/facebook/jest/pull/5340))
+
 ## jest 22.1.2
 
 ### Fixes

packages/jest-editor-support/src/Process.js

@@ -8,8 +8,8 @@
  */
 
 import {ChildProcess, spawn} from 'child_process';
-
 import ProjectWorkspace from './project_workspace';
+import type {SpawnOptions} from './types';
 
 /**
  * Spawns and returns a Jest process with specific args
@@ -20,6 +20,7 @@ import ProjectWorkspace from './project_workspace';
 export const createProcess = (
   workspace: ProjectWorkspace,
   args: Array<string>,
+  options?: SpawnOptions = {},
 ): ChildProcess => {
   // A command could look like `npm run test`, which we cannot use as a command
   // as they can only be the first command, so take out the command, and add
@@ -31,16 +32,20 @@ export const createProcess = (
   const runtimeArgs = [].concat(initialArgs, args);
 
   // If a path to configuration file was defined, push it to runtimeArgs
-  const configPath = workspace.pathToConfig;
-  if (configPath !== '') {
+  if (workspace.pathToConfig) {
     runtimeArgs.push('--config');
-    runtimeArgs.push(configPath);
+    runtimeArgs.push(workspace.pathToConfig);
   }
 
   // To use our own commands in create-react, we need to tell the command that
   // we're in a CI environment, or it will always append --watch
   const env = process.env;
   env['CI'] = 'true';
 
-  return spawn(command, runtimeArgs, {cwd: workspace.rootPath, env});
+  const spawnOptions = {
+    cwd: workspace.rootPath,
+    env,
+    shell: options.shell,
+  };
+  return spawn(command, runtimeArgs, spawnOptions);
 };

packages/jest-editor-support/src/Runner.js

@@ -7,7 +7,7 @@
  * @flow
  */
 
-import type {Options, MessageType} from './types';
+import type {Options, MessageType, SpawnOptions} from './types';
 import {messageTypes} from './types';
 
 import {ChildProcess, spawn} from 'child_process';
@@ -27,6 +27,7 @@ export default class Runner extends EventEmitter {
   _createProcess: (
     workspace: ProjectWorkspace,
     args: Array<string>,
+    options?: SpawnOptions,
   ) => ChildProcess;
   watchMode: boolean;
   options: Options;
@@ -64,7 +65,11 @@ export default class Runner extends EventEmitter {
       args.push(this.options.testFileNamePattern);
     }
 
-    this.debugprocess = this._createProcess(this.workspace, args);
+    const options = {
+      shell: this.options.shell,
+    };
+
+    this.debugprocess = this._createProcess(this.workspace, args, options);
     this.debugprocess.stdout.on('data', (data: Buffer) => {
       // Make jest save to a file, otherwise we get chunked data
       // and it can be hard to put it back together.
@@ -118,10 +123,13 @@ export default class Runner extends EventEmitter {
 
   runJestWithUpdateForSnapshots(completion: any, args: string[]) {
     const defaultArgs = ['--updateSnapshot'];
-    const updateProcess = this._createProcess(this.workspace, [
-      ...defaultArgs,
-      ...(args ? args : []),
-    ]);
+
+    const options = {shell: this.options.shell};
+    const updateProcess = this._createProcess(
+      this.workspace,
+      [...defaultArgs, ...(args ? args : [])],
+      options,
+    );
     updateProcess.on('close', () => {
       completion();
     });

packages/jest-editor-support/src/__tests__/process.test.js

@@ -0,0 +1,129 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. 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.
+ *
+ * @flow
+ */
+
+'use strict';
+
+jest.mock('child_process');
+
+import {createProcess} from '../Process';
+import {spawn} from 'child_process';
+
+describe('createProcess', () => {
+  afterEach(() => {
+    jest.resetAllMocks();
+  });
+
+  it('spawns the process', () => {
+    const workspace: any = {pathToJest: ''};
+    const args = [];
+    createProcess(workspace, args);
+
+    expect(spawn).toBeCalled();
+  });
+
+  it('spawns the command from workspace.pathToJest', () => {
+    const workspace: any = {pathToJest: 'jest'};
+    const args = [];
+    createProcess(workspace, args);
+
+    expect(spawn.mock.calls[0][0]).toBe('jest');
+    expect(spawn.mock.calls[0][1]).toEqual([]);
+  });
+
+  it('spawns the first arg from workspace.pathToJest split on " "', () => {
+    const workspace: any = {pathToJest: 'npm test --'};
+    const args = [];
+    createProcess(workspace, args);
+
+    expect(spawn.mock.calls[0][0]).toBe('npm');
+    expect(spawn.mock.calls[0][1]).toEqual(['test', '--']);
+  });
+
+  it('fails to spawn the first quoted arg from workspace.pathToJest', () => {
+    const workspace: any = {
+      pathToJest:
+        '"../build scripts/test" --coverageDirectory="../code coverage"',
+    };
+    const args = [];
+    createProcess(workspace, args);
+
+    expect(spawn.mock.calls[0][0]).not.toBe('"../build scripts/test"');
+    expect(spawn.mock.calls[0][1]).not.toEqual([
+      '--coverageDirectory="../code coverage"',
+    ]);
+  });
+
+  it('appends args', () => {
+    const workspace: any = {pathToJest: 'npm test --'};
+    const args = ['--option', 'value', '--another'];
+    createProcess(workspace, args);
+
+    expect(spawn.mock.calls[0][1]).toEqual(['test', '--', ...args]);
+  });
+
+  it('sets the --config arg to workspace.pathToConfig', () => {
+    const workspace: any = {
+      pathToConfig: 'non-standard.jest.js',
+      pathToJest: 'npm test --',
+    };
+    const args = ['--option', 'value'];
+    createProcess(workspace, args);
+
+    expect(spawn.mock.calls[0][1]).toEqual([
+      'test',
+      '--',
+      '--option',
+      'value',
+      '--config',
+      'non-standard.jest.js',
+    ]);
+  });
+
+  it('defines the "CI" environment variable', () => {
+    const expected = {
+      ...process.env,
+      CI: 'true',
+    };
+
+    const workspace: any = {pathToJest: ''};
+    const args = [];
+    createProcess(workspace, args);
+
+    expect(spawn.mock.calls[0][2].env).toEqual(expected);
+  });
+
+  it('sets the current working directory of the child process', () => {
+    const workspace: any = {
+      pathToJest: '',
+      rootPath: 'root directory',
+    };
+    const args = [];
+    createProcess(workspace, args);
+
+    expect(spawn.mock.calls[0][2].cwd).toBe(workspace.rootPath);
+  });
+
+  it('should not set the "shell" property when "options" are not provided', () => {
+    const workspace: any = {pathToJest: ''};
+    const args = [];
+    createProcess(workspace, args);
+
+    expect(spawn.mock.calls[0][2].shell).not.toBeDefined();
+  });
+
+  it('should set the "shell" property when "options" are provided', () => {
+    const expected = {};
+    const workspace: any = {pathToJest: ''};
+    const args = [];
+    const options: any = {shell: expected};
+    createProcess(workspace, args, options);
+
+    expect(spawn.mock.calls[0][2].shell).toBe(expected);
+  });
+});