escape testPathDirs before constructing regexes (#1379)

* escape testPathDirs before constructing regexes

* check for failed path parsing

* remove extraneous argument from test call

* assert that tests have been found and have passed

integration_tests/__tests__/regex-(char-in-path-test.js

@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @emails oncall+jsinfra
+ */
+'use strict';
+
+const runJest = require('../runJest');
+
+describe('Regex Char In Path', () => {
+  it('parses paths containing regex chars correctly', () => {
+    const {json} = runJest.json('regex-(char-in-path', []);
+
+    expect(json.numTotalTests).toBe(1);
+    expect(json.numPassedTests).toBe(1);
+  });
+});

integration_tests/regex-(char-in-path/__tests__/regex-(char-in-path.test.js

@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+'use strict';
+
+it('runs this', () => {
+  expect(true).toBe(true);
+});

integration_tests/regex-(char-in-path/package.json

@@ -0,0 +1 @@
+{}

packages/jest-cli/src/SearchSource.js

@@ -81,7 +81,9 @@ class SearchSource {
     this._options = options || {};
 
     this._testPathDirPattern =
-      new RegExp(config.testPathDirs.map(dir => pathToRegex(dir)).join('|'));
+      new RegExp(config.testPathDirs.map(dir => {
+        return pathToRegex(utils.escapeStrForRegex(dir));
+      }).join('|'));
     this._testRegex = new RegExp(pathToRegex(config.testRegex));
     const ignorePattern = config.testPathIgnorePatterns;
     this._testIgnorePattern =