test: Stryker Jest runner with config workarounds

jest.config.js

@@ -143,21 +143,24 @@ module.exports = {
   // Adds a location field to test results
   // testLocationInResults: false,
 
+  // TBD ENABLED to work with Stryker Jest runner:
   // The glob patterns Jest uses to detect test files
-  // testMatch: [
-  //   "**/__tests__/**/*.[jt]s?(x)",
-  //   "**/?(*.)+(spec|test).[tj]s?(x)"
-  // ],
+  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: [
+  testPathIgnorePatterns: [
   //   "/node_modules/"
-  // ],
+    "/test/test.js"
+  ],
 
+  // TBD NOT WORKING with Stryker Jest runner:
   // The regexp pattern or array of patterns that Jest uses to detect test files
-  testRegex: [
-  	/\.test\.js?$/
-	],
+  //  testRegex: [
+  //    /\.test\.js?$/
+  //  ],
 
   // This option allows the use of a custom results processor
   // testResultsProcessor: undefined,

package.json

@@ -38,7 +38,8 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "@stryker-mutator/core": "^4.5.1",
+    "@stryker-mutator/core": "4.5.1",
+    "@stryker-mutator/jest-runner": "4.5.1",
     "dom-js": "0.0.9",
     "eslint": "^7.24.0",
     "eslint-config-prettier": "^8.2.0",

stryker.conf.json

@@ -7,15 +7,12 @@
     "progress",
     "dashboard"
   ],
-  "testRunner": "command",
+  "testRunner": "jest",
+  "coverageAnalysis": "perTest",
   "dashboard": {
     "project": "github.com/brodybits/xmldom",
     "version": "master"
   },
-  "coverageAnalysis": "off",
-  "commandRunner": {
-    "command": "npm run test:jest -- --bail --no-cache --ci --maxWorkers=1"
-  },
   "timeoutMS_comment": "When all tests pass (mutant survives) our tests need some time. So this is configured to prevent 'timeout's",
   "timeoutMS": 15000
 }