feat(mocha): support mocha 6.2

Mocha 6.2's internals changed. See https://github.com/mochajs/mocha/releases/tag/v6.2.0

e2e/package.json

@@ -21,7 +21,7 @@
     "link-parent-bin": "~1.0.0",
     "load-grunt-tasks": "~4.0.0",
     "mocha": "~5.2.0",
-    "mutation-testing-metrics": "^1.0.7",
+    "mutation-testing-metrics": "^1.1.1",
     "rxjs": "^6.3.3",
     "semver": "^5.6.0",
     "ts-node": "~7.0.0",

packages/core/package.json

@@ -65,7 +65,7 @@
     "lodash": "~4.17.4",
     "log4js": "~4.5.1",
     "mkdirp": "~0.5.1",
-    "mutation-testing-metrics": "^1.0.7",
+    "mutation-testing-metrics": "^1.1.1",
     "progress": "~2.0.0",
     "rimraf": "~2.6.1",
     "rxjs": "~6.5.1",

packages/mocha-runner/src/LibWrapper.ts

@@ -19,6 +19,10 @@ try {
 try {
   // https://github.com/mochajs/mocha/blob/master/lib/cli/run-helpers.js#L132
   handleFiles = require('mocha/lib/cli/run-helpers').handleFiles;
+  if (!handleFiles) {
+    // Might be moved: https://github.com/mochajs/mocha/commit/15b96afccaf508312445770e3af1c145d90b28c6#diff-39b692a81eb0c9f3614247af744ab4a8
+    handleFiles = require('mocha/lib/cli/collect-files');
+  }
 } catch {
   // Mocha < 6 doesn't support `handleFiles`
 }

packages/mocha-runner/src/MochaOptionsLoader.ts

@@ -13,6 +13,8 @@ import { filterConfig, mochaOptionsKey, serializeArguments } from './utils';
  */
 export const DEFAULT_MOCHA_OPTIONS = Object.freeze({
   extension: ['js'],
+  file: [],
+  ignore: [],
   opts: './test/mocha.opts',
   spec: ['test'],
   timeout: 2000,

packages/mocha-runner/src/MochaTestRunner.ts

@@ -37,8 +37,10 @@ export default class MochaTestRunner implements TestRunner {
     try {
       // process.exit unfortunate side effect: https://github.com/mochajs/mocha/blob/07ea8763c663bdd3fe1f8446cdb62dae233f4916/lib/cli/run-helpers.js#L174
       (process as any).exit = () => { };
-      return handleFiles(this.mochaOptions);
-    } finally {
+      const files = handleFiles(this.mochaOptions);
+      return files;
+    }
+    finally {
       process.exit = originalProcessExit;
     }
   }

packages/mocha-runner/src/utils.ts

@@ -33,6 +33,7 @@ const SUPPORTED_MOCHA_OPTIONS = Object.freeze([
   'ui',
   'grep',
   'exclude',
+  'ignore',
   'spec',
   'file'
 ]);

packages/mocha-runner/test/helpers/factories.ts

@@ -0,0 +1,6 @@
+import { MochaOptions } from '../../src/MochaOptions';
+import { DEFAULT_MOCHA_OPTIONS } from '../../src/MochaOptionsLoader';
+
+export function createMochaOptions(overrides: Partial<MochaOptions>): MochaOptions {
+  return { ...DEFAULT_MOCHA_OPTIONS, ...overrides };
+}

packages/mocha-runner/test/integration/MochaOptionsLoader.it.spec.ts

@@ -71,13 +71,16 @@ describe(`${MochaOptionsLoader.name} integration`, () => {
         '/path/to/some/file',
         '/path/to/some/other/file'
       ],
+      ignore: [
+        '/path/to/some/excluded/file'
+      ],
       require: [
         '@babel/register'
       ],
       spec: [
         'test/**/*.spec.js'
       ],
-      timeout: 0,
+      timeout: false,
       ui: 'bdd'
     });
   });
@@ -88,6 +91,8 @@ describe(`${MochaOptionsLoader.name} integration`, () => {
     expect(actualConfig).deep.eq({
       ['async-only']: true,
       extension: ['js'],
+      file: [],
+      ignore: [],
       opts: configFile,
       spec: ['/tests/**/*.js', '/foo/*.js'],
       timeout: 2000,
@@ -101,7 +106,7 @@ describe(`${MochaOptionsLoader.name} integration`, () => {
     expect(actualConfig).deep.eq({
       ...DEFAULT_MOCHA_OPTIONS,
       ['async-only']: true,
-      extension: ['json', 'js'],
+      extension: ['json'],
       package: pkgFile,
       timeout: 20,
       ui: 'tdd'

packages/mocha-runner/test/integration/MochaTestFrameworkIntegrationTestWorker.ts

@@ -14,13 +14,15 @@ export interface RunMessage {
 }
 
 export default class MochaTestFrameworkIntegrationTestWorker {
-  private readonly sut: MochaTestRunner;
+  public readonly sut: MochaTestRunner;
 
   constructor() {
     testInjector.options.mochaOptions = {
+      file: [],
+      ignore: [],
       spec: [
         path.resolve(__dirname, '..', '..', 'testResources', 'sampleProject', 'MyMathSpec.js')
-      ]
+      ],
     };
     this.sut = testInjector.injector
       .provideValue(commonTokens.sandboxFileNames, [
@@ -30,11 +32,11 @@ export default class MochaTestFrameworkIntegrationTestWorker {
       .injectClass(MochaTestRunner);
 
     this.listenForParentProcess();
-    try {
-      this.sut.init();
-    } catch (err) {
-      this.sendError(err);
-    }
+    // try {
+    this.sut.init();
+    // } catch (err) {
+    //   this.sendError(err);
+    // }
   }
 
   public listenForParentProcess() {

packages/mocha-runner/test/integration/QUnitSample.it.spec.ts

@@ -4,6 +4,7 @@ import { testInjector } from '@stryker-mutator/test-helpers';
 import { expect } from 'chai';
 import * as path from 'path';
 import MochaTestRunner from '../../src/MochaTestRunner';
+import { createMochaOptions } from '../helpers/factories';
 
 describe('QUnit sample', () => {
   let files: string[];
@@ -19,13 +20,13 @@ describe('QUnit sample', () => {
   }
 
   it('should work when configured with "qunit" ui', async () => {
-    const mochaOptions = {
+    const mochaOptions = createMochaOptions({
       require: [],
       spec: [resolve('./testResources/qunit-sample/MyMathSpec.js')],
       ui: 'qunit'
-    };
+    });
     testInjector.options.mochaOptions = mochaOptions;
-    files = mochaOptions.spec;
+    files = mochaOptions.spec || [];
     const sut = createSut();
     await sut.init();
     const actualResult = await sut.run({});
@@ -44,11 +45,11 @@ describe('QUnit sample', () => {
       resolve('./testResources/qunit-sample/MyMathSpec.js'),
       resolve('./testResources/qunit-sample/MyMath.js')
     ];
-    testInjector.options.mochaOptions = {
+    testInjector.options.mochaOptions = createMochaOptions({
       files: [
         resolve('./testResources/qunit-sample/MyMathSpec.js')
       ]
-    };
+    });
     const sut = createSut();
     await sut.init();
     const actualResult = await sut.run({});

packages/mocha-runner/test/integration/SampleProject.it.spec.ts

@@ -4,8 +4,8 @@ import { testInjector } from '@stryker-mutator/test-helpers';
 import * as chai from 'chai';
 import * as chaiAsPromised from 'chai-as-promised';
 import * as path from 'path';
-import { MochaOptions } from '../../src/MochaOptions';
 import MochaTestRunner from '../../src/MochaTestRunner';
+import { createMochaOptions } from '../helpers/factories';
 chai.use(chaiAsPromised);
 const expect = chai.expect;
 
@@ -39,7 +39,7 @@ describe('Running a sample project', () => {
         resolve('./testResources/sampleProject/MyMath.js'),
         resolve('./testResources/sampleProject/MyMathSpec.js')
       ];
-      testInjector.options.mochaOptions = { spec };
+      testInjector.options.mochaOptions = createMochaOptions({ spec });
       sut = createSut();
       return sut.init();
     });
@@ -66,10 +66,9 @@ describe('Running a sample project', () => {
         resolve('testResources/sampleProject/MyMath.js'),
         resolve('testResources/sampleProject/MyMathSpec.js'),
       ];
-      const mochaOptions: MochaOptions = {
+      testInjector.options.mochaOptions = createMochaOptions({
         files: spec
-      };
-      testInjector.options.mochaOptions = mochaOptions;
+      });
       sut = createSut();
       return sut.init();
     });
@@ -87,7 +86,7 @@ describe('Running a sample project', () => {
         resolve('testResources/sampleProject/MyMath.js'),
         resolve('testResources/sampleProject/MyMathFailedSpec.js')
       ];
-      testInjector.options.mochaOptions = { spec };
+      testInjector.options.mochaOptions = createMochaOptions({ spec });
       sut = createSut();
       return sut.init();
     });
@@ -102,7 +101,7 @@ describe('Running a sample project', () => {
 
     beforeEach(() => {
       spec = [resolve('./testResources/sampleProject/MyMath.js')];
-      testInjector.options.mochaOptions = { spec };
+      testInjector.options.mochaOptions = createMochaOptions({ spec });
       sut = createSut();
       return sut.init();
     });

packages/mocha-runner/test/unit/MochaOptionsLoader.spec.ts

@@ -59,6 +59,7 @@ describe(MochaOptionsLoader.name, () => {
       rawOptions.ui = 'quux';
       rawOptions.grep = 'quuz';
       rawOptions.exclude = 'corge';
+      rawOptions.ignore = 'garply';
       rawOptions.file = 'grault';
       rawOptions.spec = ['test/**/*.js'];
 
@@ -69,6 +70,7 @@ describe(MochaOptionsLoader.name, () => {
         extension: 'foo',
         file: 'grault',
         grep: 'quuz',
+        ignore: 'garply',
         opts: './test/mocha.opts',
         override: true,
         require: 'bar',
@@ -94,7 +96,7 @@ describe(MochaOptionsLoader.name, () => {
 
     it('should respect mocha\'s defaults', () => {
       const options = sut.load(testInjector.options);
-      expect(options).deep.eq(defaultMochaOptions());
+      expect(options).deep.eq(createMochaOptions());
     });
   });
 
@@ -159,7 +161,7 @@ describe(MochaOptionsLoader.name, () => {
     it('should not load default mocha.opts file if not found', () => {
       existsFileStub.returns(false);
       const options = sut.load(config);
-      expect(options).deep.eq(defaultMochaOptions());
+      expect(options).deep.eq(createMochaOptions());
       expect(testInjector.logger.debug).calledWith('No mocha opts file found, not loading additional mocha options (%s.opts was not defined).', 'mochaOptions');
     });
 
@@ -211,15 +213,15 @@ describe(MochaOptionsLoader.name, () => {
         ui: 'exports'
       };
       const options = sut.load(config);
-      expect(options).deep.equal({
+      expect(options).deep.equal(createMochaOptions({
         asyncOnly: false,
         extension: ['js'],
         opts: 'path/to/opts/file',
         require: ['ts-node/register'],
         spec: ['test'],
         timeout: 4000,
         ui: 'exports'
-      });
+      }));
     });
 
     it('should ignore additional properties', () => {
@@ -246,25 +248,28 @@ describe(MochaOptionsLoader.name, () => {
         opts: 'some/mocha.opts/file',
       };
       const options = sut.load(config);
-      expect(options).deep.eq({
+      expect(options).deep.eq(createMochaOptions({
         extension: ['js'],
         opts: 'some/mocha.opts/file',
         spec: [
           'test'
         ],
         timeout: undefined,
         ui: undefined
-      });
+      }));
     });
   });
 
-  function defaultMochaOptions()  {
+  function createMochaOptions(overrides?: Partial<MochaOptions>)  {
     return {
       extension: ['js'],
+      file: [],
+      ignore: [],
       opts: './test/mocha.opts',
       spec: ['test'],
       timeout: 2000,
-      ui: 'bdd'
+      ui: 'bdd',
+      ... overrides
     };
   }
 

packages/mocha-runner/testResources/mocha-config/.mocharc.json

@@ -4,7 +4,7 @@
 // project's `package.json`.
 {
   "diff": true,
-  "extension": ["json"],
+  "extension": ["json", "js"],
   "opts": "./test/mocha.opts",
   "package": "./package.json",
   "reporter": "spec",

packages/mocha-runner/testResources/mocha-config/.mocharc.jsonc

@@ -4,7 +4,7 @@
 // project's `package.json`.
 {
   "diff": true,
-  "extension": ["jsonc"],
+  "extension": ["jsonc", "js"],
   "opts": "./test/mocha.opts",
   "package": /* 📦 */ "./package.json",
   "reporter": /* 📋 */ "spec",

packages/test-helpers/package.json

@@ -18,7 +18,7 @@
   "homepage": "https://github.com/stryker-mutator/stryker/tree/master/packages/test-helpers#readme",
   "license": "ISC",
   "dependencies": {
-    "mutation-testing-metrics": "^1.0.7"
+    "mutation-testing-metrics": "^1.1.1"
   },
   "devDependencies": {
     "@stryker-mutator/api": "^2.0.2",