Added Mutation Tests

.gitignore

@@ -2,3 +2,5 @@ node_modules/
 coverage/
 stryker.log
 *.DS_Store
+# stryker temp files
+.stryker-tmp

docs/mutation/bind-mutation-test-report.js

+document.querySelector('mutation-test-report-app').report = {"files":{"/Users/sigmundd/Code/config/index.js":{"language":"javascript","mutants":[{"id":"0","location":{"end":{"column":22,"line":1},"start":{"column":18,"line":1}},"mutatorName":"StringLiteral","replacement":"\"\"","status":"Killed"},{"id":"1","location":{"end":{"column":26,"line":2},"start":{"column":20,"line":2}},"mutatorName":"StringLiteral","replacement":"\"\"","status":"Killed"},{"id":"8","location":{"end":{"column":130,"line":12},"start":{"column":75,"line":12}},"mutatorName":"ArrowFunction","replacement":"() => undefined","status":"Killed"},{"id":"9","location":{"end":{"column":129,"line":12},"start":{"column":111,"line":12}},"mutatorName":"ArrowFunction","replacement":"() => undefined","status":"Killed"},{"id":"3","location":{"end":{"column":2,"line":51},"start":{"column":29,"line":5}},"mutatorName":"BlockStatement","replacement":"{}","status":"Killed"},{"id":"2","location":{"end":{"column":35,"line":3},"start":{"column":21,"line":3}},"mutatorName":"StringLiteral","replacement":"\"\"","status":"Killed"},{"id":"12","location":{"end":{"column":2,"line":25},"start":{"column":42,"line":15}},"mutatorName":"BlockStatement","replacement":"{}","status":"Killed"},{"id":"13","location":{"end":{"column":31,"line":17},"start":{"column":28,"line":17}},"mutatorName":"StringLiteral","replacement":"\"\"","status":"Killed"},{"id":"14","location":{"end":{"column":29,"line":19},"start":{"column":20,"line":19}},"mutatorName":"ConditionalExpression","replacement":"false","status":"Killed"},{"id":"15","location":{"end":{"column":29,"line":19},"start":{"column":20,"line":19}},"mutatorName":"EqualityOperator","replacement":"i <= len - 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\ No newline at end of file

docs/mutation/index.html

+<!DOCTYPE html>
+<html>
+
+<head>
+    <meta charset="utf-8">
+    <script src="mutation-test-elements.js"></script>
+</head>
+
+<body>
+    <img class="stryker-image" alt="Stryker" src="stryker-80x80.png"
+        style="position: fixed; right: 0; top: 0; z-index: 10">
+    <mutation-test-report-app titlePostfix="Stryker">
+        Your browser doesn't support <a href="https://caniuse.com/#search=custom%20elements">custom elements</a>.
+        Please use a latest version of an evergreen browser (Firefox, Chrome, Safari, Opera, etc).
+    </mutation-test-report-app>
+    <script src="bind-mutation-test-report.js"></script>
+</body>
+
+</html>

package.json

@@ -5,6 +5,7 @@
   "main": "index.js",
   "scripts": {
     "test": "jest",
+    "test:mutation": "stryker run",
     "sonarqube": "sonar-scanner -Dsonar.projectKey=config -Dsonar.sources=. -Dsonar.host.url=https://it-devops-01.br-edv.brnet.int:8999 -Dsonar.login=gitlab"
   },
   "keywords": [
@@ -19,7 +20,11 @@
     "vault": "^0.3.0"
   },
   "devDependencies": {
-    "jest": "^25.1.0"
+    "@stryker-mutator/core": "^3.1.0",
+    "@stryker-mutator/javascript-mutator": "^3.1.0",
+    "@stryker-mutator/jest-runner": "^3.1.0",
+    "@stryker-mutator/typescript": "^3.1.0",
+    "jest": "^25.3.0"
   },
   "jest": {
     "collectCoverage": true,

stryker.conf.json

+{
+  "$schema": "https://raw.githubusercontent.com/stryker-mutator/stryker/master/packages/api/schema/stryker-core.json",
+  "mutator": "javascript",
+  "packageManager": "npm",
+  "reporters": [
+    "html",
+    "clear-text",
+    "progress",
+    "dashboard"
+  ],
+  "testRunner": "jest",
+  "transpilers": [],
+  "coverageAnalysis": "all",
+  "htmlReporter": {
+    "baseDir": "docs/mutation"
+  },
+  "mutate": ["index.js"]
+}
\ No newline at end of file