Implement mutation switching

.editorconfig

@@ -1,4 +1,4 @@
-[{*.ts,*.js,*jsx,*tsx,*.json,*.code-workspace}]
+[{*.ts,*.js,*jsx,*tsx,*.json,,*.jsonc,*.code-workspace}]
 insert_final_newline = true
 indent_style = space
 indent_size = 2

.eslintrc.js

@@ -11,10 +11,17 @@ module.exports = {
   plugins: ['@typescript-eslint', 'prettier', 'import'],
   rules: {
     'import/newline-after-import': 1,
-    'import/order': ["error", { "newlines-between": "always", "groups": ["builtin", ["external", "internal"], "parent", "sibling", "index"] }],
+    'import/order': [
+      "error",
+      {
+        "newlines-between": "always-and-inside-groups",
+        "groups": ["builtin", "external", "internal", "parent", "sibling", "index"]
+      }
+    ],
     'prettier/prettier': ['error'],
-    'sort-imports': 'off', // No auto-fix!
+    'sort-imports': 'off',
     'no-case-declarations': 'off',
+    'no-constant-condition': 'error',
     '@typescript-eslint/adjacent-overload-signatures': 'error',
     '@typescript-eslint/array-type': [
       'error',
@@ -23,13 +30,10 @@ module.exports = {
       }
     ],
     '@typescript-eslint/await-thenable': 'off',
-    '@typescript-eslint/ban-ts-ignore': 'error',
     '@typescript-eslint/ban-types': 'error',
     'brace-style': 'off',
     '@typescript-eslint/brace-style': 'error',
-    camelcase: 'off',
-    '@typescript-eslint/camelcase': 'error',
-    '@typescript-eslint/class-name-casing': 'error',
+    camelcase: 'error',
     '@typescript-eslint/consistent-type-assertions': 'error',
     '@typescript-eslint/consistent-type-definitions': 'error',
     '@typescript-eslint/explicit-function-return-type': 'off',
@@ -39,11 +43,10 @@ module.exports = {
     '@typescript-eslint/generic-type-naming': 'off',
     indent: 'off',
     '@typescript-eslint/indent': 'off',
-    '@typescript-eslint/interface-name-prefix': ['error', 'never'],
     '@typescript-eslint/member-delimiter-style': 'off',
-    '@typescript-eslint/member-naming': 'error',
     '@typescript-eslint/member-ordering': 'off',
-    'no-array-constructor': 'off',
+    'no-array-constructor': 'error',
+    'no-duplicate-case': 'error',
     '@typescript-eslint/no-array-constructor': 'error',
     'no-empty-function': 'off',
     '@typescript-eslint/no-empty-function': 'off',
@@ -56,6 +59,7 @@ module.exports = {
     '@typescript-eslint/no-for-in-array': 'error',
     '@typescript-eslint/no-inferrable-types': 'off',
     'no-magic-numbers': 'off',
+    'no-fallthrough': 'off',
     '@typescript-eslint/no-magic-numbers': 'off',
     '@typescript-eslint/no-misused-new': 'error',
     '@typescript-eslint/no-misused-promises': 'off',

.github/ISSUE_TEMPLATE/bug_report.md

@@ -15,11 +15,8 @@ assignees: ''
 
 <!--- Please place your stryker config below. Feel free to change paths in the files and mutate arrays if you cannot share them. -->
 
-```js
-module.exports = function(config){
-  config.set({
-    ....
-  });
+```json
+{
 }
 ```
 

.github/workflows/mutation-testing.yml

@@ -1,75 +1,35 @@
 name: mutation testing
 
 on:
+  workflow_dispatch:
   push:
     branches:
       - master
       - test/**
-
+      
 jobs:
   core:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - uses: actions/setup-node@v1
-        with:
-          node-version: 12.x
-      - name: Install & Build
-        run: |
-          npm install
-          npm run build
-      - name: Run Stryker
-        run: npx lerna run --scope "@stryker-mutator/core" --concurrency 1 --stream stryker
-        env:
-          STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
-
-  plugins-1:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-node@v1
-        with:
-          node-version: 12.x
       - name: Install & Build
         run: |
           npm install
           npm run build
       - name: Run Stryker
-        run: npx lerna run --scope "@stryker-mutator/{api,babel-transpiler,jasmine-framework,javascript-mutator}" --concurrency 1 --stream stryker
+        run: npx lerna run --scope "@stryker-mutator/core" --concurrency 1 --stream stryker -- -- --concurrency 3
         env:
           STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
 
-  plugins-2:
+  dependencies_and_plugins:
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v1
-      - uses: actions/setup-node@v1
-        with:
-          node-version: 12.x
       - name: Install & Build
         run: |
           npm install
           npm run build
       - name: Run Stryker
-        run: npx lerna run --scope "@stryker-mutator/{jasmine-runner,jest-runner,karma-runner,mocha-framework,mocha-runner}" --concurrency 1 --stream stryker
+        run: npx lerna run --scope "@stryker-mutator/{api,instrumenter,util,typescript-checker,jest-runner,karma-runner,mocha-runner,jasmine-runner}" --concurrency 1 --stream stryker -- -- --concurrency 3
         env:
-          STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
-
-  plugins-3:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-node@v1
-        with:
-          node-version: 12.x
-      - name: Install & Build
-        run: |
-          npm install
-          npm run build
-      - name: Run Stryker
-        run: npx lerna run --scope "@stryker-mutator/{typescript,vue-mutator,webpack-transpiler,wct-runner,util}" --concurrency 1 --stream stryker
-        env:
-          STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
+          STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}

.github/workflows/performance.yml

@@ -13,7 +13,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
+      with: 
+        submodules: recursive
     - name: Install dependencies
       run: npm install
     - name: Build packages

.github/workflows/publish.yml

@@ -18,4 +18,4 @@ jobs:
     - name: Build
       run: npm run build
     - name: Release
-      run: npx lerna publish from-git --yes
+      run: npx lerna publish from-git --yes --pre-dist-tag next

.gitignore

@@ -24,6 +24,9 @@ packages/*/src/**/*.js
 packages/*/test/**/*.js
 packages/*/src/**/*.d.ts
 packages/*/test/**/*.d.ts
+packages/*/dist
+e2e/test/*/dist
+e2e/test/*/dist-test
 .idea
 *.iml
 *.tmp.txt

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "perf/test/express"]
 	path = perf/test/express
-	url = git@github.com:expressjs/express.git
+	url = https://github.com/expressjs/express.git

.prettierrc

@@ -1,4 +1,5 @@
 {
-  "printWidth": 150,
-  "singleQuote": true
-}
+  'printWidth': 150,
+  'singleQuote': true,
+  'endOfLine': 'auto',
+}

.vscode/launch.json

@@ -4,6 +4,15 @@
   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
   "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Launch Program",
+      "program": "${file}",
+      "skipFiles": [
+        "<node_internals>/**"
+      ]
+    },
     {
       "type": "node",
       "request": "launch",
@@ -60,12 +69,6 @@
       ],
       "internalConsoleOptions": "openOnSessionStart"
     },
-    {
-      "type": "node",
-      "request": "launch",
-      "name": "Launch Program",
-      "program": "${workspaceRoot}\\packages\\stryker-mocha-runner\""
-    },
     {
       "type": "node",
       "request": "attach",