Only run tests in <rootDir>/src (facebook#544)

* updates Jest to 19.0.2

* removes testPathIgnorePatterns from jest config

* adds testMatch to jest config to only match files in src

Author: kindrowboat

Diff for: packages/react-scripts/package.json

@@ -49,7 +49,7 @@
     "fs-extra": "0.30.0",
     "html-webpack-plugin": "2.28.0",
     "http-proxy-middleware": "0.17.3",
-    "jest": "18.1.0",
+    "jest": "19.0.2",
     "object-assign": "4.1.1",
     "postcss-loader": "1.3.3",
     "promise": "7.1.1",

Diff for: packages/react-scripts/scripts/utils/createJestConfig.js

@@ -25,8 +25,9 @@ module.exports = (resolve, rootDir, isEjecting) => {
     collectCoverageFrom: ['src/**/*.{js,jsx}'],
     setupFiles: [resolve('config/polyfills.js')],
     setupTestFrameworkScriptFile: setupTestsFile,
-    testPathIgnorePatterns: [
-      '<rootDir>[/\\\\](build|docs|node_modules|scripts)[/\\\\]',
+    testMatch: [
+      '<rootDir>/src/**/__tests__/**/*.js?(x)',
+      '<rootDir>/src/**/?(*.)(spec|test).js?(x)'
     ],
     testEnvironment: 'node',
     testURL: 'http://localhost',