Upgrade Jest and drop Node 4

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "8"
-  - "7"
-  - "6"
-  - "4"
+  - '10'
+  - '8'
+  - '7'
+  - '6'

integrationTests/__snapshots__/failing.test.js.snap

@@ -2,11 +2,11 @@
 
 exports[`Works when it has failing tests 1`] = `
 "FAIL integrationTests/__fixtures__/failing/__eslint__/file.js
+  ✕ ESLint
 /mocked-path-to-jest-runner-mocha/integrationTests/__fixtures__/failing/__eslint__/file.js
   4:3  error  'hello' is not defined  no-undef
   5:3  error  'bye' is not defined    no-undef
 ✖ 2 problems (2 errors, 0 warnings)
-  ✕ ESLint
 Test Suites: 1 failed, 1 total
 Tests:       1 failed, 1 total
 Snapshots:   0 total

integrationTests/__snapshots__/format.test.js.snap

@@ -2,6 +2,7 @@
 
 exports[`Applies custom formatter 1`] = `
 "FAIL integrationTests/__fixtures__/format/__eslint__/file.js
+  ✕ ESLint
       at mocked-stack-trace  2 |
   3 | if (a === 2) {
 > 4 |   hello();
@@ -16,7 +17,6 @@ mocked-stack-trace  3 | if (a === 2) {
   6 | }
   7 |
 2 errors found.
-  ✕ ESLint
 Test Suites: 1 failed, 1 total
 Tests:       1 failed, 1 total
 Snapshots:   0 total

integrationTests/__snapshots__/max-warnings.test.js.snap

@@ -2,13 +2,13 @@
 
 exports[`Fails if more than max warnings 1`] = `
 "FAIL integrationTests/__fixtures__/max-warnings/__eslint__/file.js
+  ✕ ESLint
 /mocked-path-to-jest-runner-mocha/integrationTests/__fixtures__/max-warnings/__eslint__/file.js
   3:1  warning  Unexpected console statement  no-console
   4:1  warning  Unexpected console statement  no-console
   5:1  warning  Unexpected console statement  no-console
 ✖ 3 problems (0 errors, 3 warnings)
 ESLint found too many warnings (maximum: 2).
-  ✕ ESLint
 Test Suites: 1 failed, 1 total
 Tests:       1 failed, 1 total
 Snapshots:   0 total

jest.config.js

@@ -1,4 +1,8 @@
 module.exports = {
+  watchPlugins: [
+    'jest-watch-typeahead/filename',
+    'jest-watch-typeahead/testname',
+  ],
   testPathIgnorePatterns: ['/examples/', '/node_modules/', '/__eslint__/'],
   testMatch: [
     '<rootDir>/src/**/__tests__/**/*.js',

package.json

@@ -29,15 +29,16 @@
   },
   "devDependencies": {
     "babel-cli": "6.26.0",
-    "babel-jest": "21.0.0",
+    "babel-jest": "23.6.0",
     "babel-preset-env": "1.6.0",
     "eslint-config-airbnb-base": "11.3.2",
     "eslint-config-prettier": "2.3.0",
     "eslint-plugin-import": "2.7.0",
     "eslint-plugin-jest": "20.0.3",
     "eslint-plugin-prettier": "2.2.0",
     "execa": "0.8.0",
-    "jest": "21.0.1",
+    "jest": "23.6.0",
+    "jest-watch-typeahead": "^0.2.0",
     "prettier": "1.5.3"
   }
 }

src/utils/__tests__/normalizeConfig.test.js

@@ -128,9 +128,7 @@ it('normalizes parser', () => {
 });
 
 it('normalizes parserOptions', () => {
-  expect(normalizeCLIOptions({})).not.toMatchObject({
-    parserOptions: {},
-  });
+  expect(normalizeCLIOptions({}).parseOptions).toBeUndefined();
 
   expect(
     normalizeCLIOptions({ parserOptions: { ecmaVersion: 2015 } }),