Merge pull request #23 from DHI-GRAS/feature/jest

add jest+enzyme testing environment

.gitignore

@@ -7,6 +7,7 @@ node_modules
 
 # testing
 /coverage
+__snapshots__
 
 # production
 /build

.travis.yml

@@ -11,11 +11,12 @@ defaults: &defaults
     # install dependencies
     - yarn install
 
+
   # script:
   #   #   ## print all Travis environment variables for debugging
   #   # - $(npm bin)/print-env TRAVIS
   #   # - yarn run start
-  #   - yarn build
+  #   - yarn build:prod
   #   - yarn link
   #   # - yarn run cy:run -- --record --parallel --group $STAGE_NAME
   #   # after all tests finish running we need
@@ -39,6 +40,9 @@ jobs:
     #   env:
     #     - STAGE_NAME="4x-electron on Travis CI"
     #   <<: *defaults
+    - stage: test
+      privder: script
+      script: yarn test
     - stage: build
       provider: script
       script: yarn build:prod

dist/setupEnzyme.d.ts

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

jest.config.js

@@ -0,0 +1,184 @@
+// For a detailed explanation regarding each configuration property, visit:
+// https://jestjs.io/docs/en/configuration.html
+
+module.exports = {
+  // All imported modules in your tests should be mocked automatically
+  // automock: false,
+
+  // Stop running tests after `n` failures
+  // bail: 0,
+
+  // Respect "browser" field in package.json when resolving modules
+  // browser: false,
+
+  // The directory where Jest should store its cached dependency information
+  // cacheDirectory: "C:\\Users\\rabe\\AppData\\Local\\Temp\\jest",
+
+  // Automatically clear mock calls and instances between every test
+  clearMocks: true,
+
+  // Indicates whether the coverage information should be collected while executing the test
+  // collectCoverage: false,
+
+  // An array of glob patterns indicating a set of files for which coverage information should be collected
+  // collectCoverageFrom: null,
+
+  // The directory where Jest should output its coverage files
+  // coverageDirectory: null,
+
+  // An array of regexp pattern strings used to skip coverage collection
+  // coveragePathIgnorePatterns: [
+  //   "\\\\node_modules\\\\"
+  // ],
+
+  // A list of reporter names that Jest uses when writing coverage reports
+  // coverageReporters: [
+  //   "json",
+  //   "text",
+  //   "lcov",
+  //   "clover"
+  // ],
+
+  // An object that configures minimum threshold enforcement for coverage results
+  // coverageThreshold: null,
+
+  // A path to a custom dependency extractor
+  // dependencyExtractor: null,
+
+  // Make calling deprecated APIs throw helpful error messages
+  // errorOnDeprecated: false,
+
+  // Force coverage collection from ignored files using an array of glob patterns
+  // forceCoverageMatch: [],
+
+  // A path to a module which exports an async function that is triggered once before all test suites
+  // globalSetup: null,
+
+  // A path to a module which exports an async function that is triggered once after all test suites
+  // globalTeardown: null,
+
+  // A set of global variables that need to be available in all test environments
+  // globals: {},
+
+  // The maximum amount of workers used to run your tests. Can be specified as % or a number. E.g. maxWorkers: 10% will use 10% of your CPU amount + 1 as the maximum worker number. maxWorkers: 2 will use a maximum of 2 workers.
+  // maxWorkers: "50%",
+
+  // An array of directory names to be searched recursively up from the requiring module's location
+  // moduleDirectories: [
+  //   "node_modules"
+  // ],
+
+  // An array of file extensions your modules use
+  // moduleFileExtensions: [
+  //   "js",
+  //   "json",
+  //   "jsx",
+  //   "ts",
+  //   "tsx",
+  //   "node"
+  // ],
+
+  // A map from regular expressions to module names that allow to stub out resources with a single module
+  // moduleNameMapper: {},
+
+  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
+  // modulePathIgnorePatterns: [],
+
+  // Activates notifications for test results
+  // notify: false,
+
+  // An enum that specifies notification mode. Requires { notify: true }
+  // notifyMode: "failure-change",
+
+  // A preset that is used as a base for Jest's configuration
+  // preset: null,
+
+  // Run tests from one or more projects
+  // projects: null,
+
+  // Use this configuration option to add custom reporters to Jest
+  // reporters: undefined,
+
+  // Automatically reset mock state between every test
+  // resetMocks: false,
+
+  // Reset the module registry before running each individual test
+  // resetModules: false,
+
+  // A path to a custom resolver
+  // resolver: null,
+
+  // Automatically restore mock state between every test
+  // restoreMocks: false,
+
+  // The root directory that Jest should scan for tests and modules within
+  // rootDir: null,
+
+  // A list of paths to directories that Jest should use to search for files in
+  roots: ['<rootDir>/src'],
+
+  // Allows you to use a custom runner instead of Jest's default test runner
+  // runner: "jest-runner",
+
+  // The paths to modules that run some code to configure or set up the testing environment before each test
+  // setupFiles: [],
+
+  // A list of paths to modules that run some code to configure or set up the testing framework before each test
+  setupFilesAfterEnv: ['<rootDir>/src/enzyme.ts'],
+
+  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
+  // snapshotSerializers: ['enzyme-to-json/serializer'],
+  // The test environment that will be used for testing
+  testEnvironment: 'node',
+
+  // Options that will be passed to the testEnvironment
+  // testEnvironmentOptions: {},
+
+  // Adds a location field to test results
+  // testLocationInResults: false,
+
+  // The glob patterns Jest uses to detect test files
+  testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[tj]s?(x)'],
+
+  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
+  // testPathIgnorePatterns: [
+  //   "\\\\node_modules\\\\"
+  // ],
+
+  // The regexp pattern or array of patterns that Jest uses to detect test files
+  // testRegex: [],
+
+  // This option allows the use of a custom results processor
+  // testResultsProcessor: null,
+
+  // This option allows use of a custom test runner
+  // testRunner: "jasmine2",
+
+  // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
+  // testURL: "http://localhost",
+
+  // Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
+  // timers: "real",
+
+  // A map from regular expressions to paths to transformers
+  transform: {
+    '^.+\\.(ts|tsx)$': 'ts-jest',
+  },
+
+  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
+  // transformIgnorePatterns: [
+  //   "\\\\node_modules\\\\"
+  // ],
+
+  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
+  // unmockedModulePathPatterns: undefined,
+
+  // Indicates whether each individual test should be reported during the run
+  // verbose: null,
+
+  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
+  // watchPathIgnorePatterns: [],
+
+  // Whether to use watchman for file crawling
+  // watchman: true,
+};

package.json

@@ -42,16 +42,24 @@
     "@semantic-release/github": "^7.0.7",
     "@semantic-release/npm": "^7.0.5",
     "@semantic-release/release-notes-generator": "^9.0.1",
+    "@types/enzyme": "^3.10.5",
+    "@types/jest": "^26.0.10",
     "@types/node": "^14.6.0",
+    "@types/prettier": "^2.1.0",
     "@types/react": "^16.9.47",
     "@types/react-dom": "^16.9.8",
     "babel-loader": "^8.1.0",
     "babel-plugin-module-resolver": "^4.0.0",
     "css-loader": "^4.2.1",
     "env-cmd": "^10.1.0",
+    "enzyme": "^3.11.0",
+    "enzyme-adapter-react-16": "^1.15.4",
     "file-loader": "^6.0.0",
     "formik": "^2.1.5",
     "formik-material-ui": "^3.0.0-alpha.0",
+    "jest": "^26.4.2",
+    "jsdom": "^16.4.0",
+    "jsdom-global": "^3.0.2",
     "prop-types": "^15.7.2",
     "react": "16.13.1",
     "react-docgen-typescript-loader": "^3.7.2",
@@ -61,6 +69,7 @@
     "sass-loader": "^9.0.3",
     "semantic-release": "^17.0.8",
     "style-loader": "^1.2.1",
+    "ts-jest": "^26.3.0",
     "ts-loader": "^8.0.3",
     "typescript": "^4.0.2",
     "webpack-cli": "^3.3.12",
@@ -69,7 +78,7 @@
   "scripts": {
     "build:dev": "yarn run webpack --mode development",
     "build:prod": "yarn run webpack --mode production",
-    "test": "react-scripts test --passWithNoTests",
+    "test": "jest",
     "semantic-release": "npx semantic-release",
     "yalc:link": "yarn build:prod && yalc publish"
   },

src/components/SidebarTitle/SidebarTitle.test.tsx

@@ -0,0 +1,17 @@
+import 'jsdom-global/register';
+import * as React from 'react';
+import { shallow, mount } from 'enzyme';
+import SidebarTitle from './SidebarTitle';
+describe('SidebarTitle', () => {
+  it('has title', () => {
+    let wrap = mount<typeof SidebarTitle>(<SidebarTitle title="Its me" />);
+    expect(wrap.find('h2').text()).toEqual('Its me');
+  });
+
+  it('has subtitles', () => {
+    let wrap = mount<typeof SidebarTitle>(
+      <SidebarTitle title="Its me" subTitle={['subtitle1', 'subtitle2']} />
+    );
+    expect(wrap.find('h4')).toHaveLength(2);
+  });
+});

src/enzyme.ts

@@ -0,0 +1,3 @@
+import * as Enzyme from 'enzyme';
+import * as Adapter from 'enzyme-adapter-react-16';
+Enzyme.configure({ adapter: new Adapter() });

tsconfig.json

@@ -1,5 +1,6 @@
 {
   "include": ["src/*"],
+  "exclude": ["node_modules", "**/*.spec.ts"],
   "compilerOptions": {
     "module": "commonjs",
     "target": "es5",