[WIP] Feature tests (#750)

* base test

* fix: setupEnzyme.ts path

* remove dep on ts-jest

* bump snap

* bump snap + remove @types deps

* updated package.json

* borrow yarn.lock

* working

* fix base tests

* add test with tabs

* test setup

* remove lints

* recover localDevIndex from master

packages/graphql-playground-react/jest.config.js

@@ -0,0 +1,21 @@
+module.exports = {
+  roots: ['<rootDir>/src'],
+  transform: {
+    '^.+\\.css$': '<rootDir>/config/jest/cssTransform.js',
+    '^.+\\.tsx?$': '<rootDir>/config/jest/typescriptTransform.js',
+    '^(?!.*\\.(css|json)$)': '<rootDir>/config/jest/fileTransform.js',
+  },
+  transformIgnorePatterns: ['[/\\\\]node_modules[/\\\\].+\\.(js|jsx)$'],
+  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$',
+  testPathIgnorePatterns: ['<rootDir>[/\\\\](build|docs|node_modules)[/\\\\]'],
+  testEnvironment: 'jsdom',
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+  snapshotSerializers: ['enzyme-to-json/serializer'],
+  setupTestFrameworkScriptFile: '<rootDir>/src/setupEnzyme.ts',
+  globals: {
+    'ts-jest': {
+      tsConfigFile: 'tsconfig.jest.json',
+    },
+  },
+  setupFiles: ['<rootDir>/config/polyfills.js', 'jest-localstorage-mock'],
+}

packages/graphql-playground-react/package.json

@@ -22,7 +22,8 @@
     "tsc": "tsc -p tsconfig.build.json",
     "build-package": "rimraf lib build/dist && npm run tsc && babel lib -d lib && cp -r ./src/assets/ ./lib/assets/ && cd lib && rimraf *.jsx;",
     "build-app": "node scripts/build.js",
-    "test": "bundlesize",
+    "test": "jest",
+    "bundlesize": "bundlesize",
     "bump": "npm version patch --no-git-tag-version && git add package.json",
     "graphql-faker": "graphql-faker ./tests/schema.faker.graphql",
     "lint": "tslint \"src/**/*.ts{,x}\"",
@@ -63,6 +64,9 @@
     "css-loader": "0.28.11",
     "detect-port": "1.2.3",
     "dotenv": "5.0.1",
+    "enzyme": "^3.3.0",
+    "enzyme-adapter-react-16": "^1.1.1",
+    "enzyme-to-json": "^3.3.4",
     "extract-text-webpack-plugin": "3.0.2",
     "file-loader": "1.1.11",
     "filesize": "3.6.1",
@@ -73,6 +77,7 @@
     "http-proxy-middleware": "0.17.4",
     "husky": "0.14.3",
     "jest": "22.1.4",
+    "jest-localstorage-mock": "^2.2.0",
     "json-loader": "0.5.7",
     "lint-staged": "6.1.0",
     "node-noop": "1.0.0",