stryker: init

.github/workflows/devenv.yaml

@@ -20,5 +20,9 @@ jobs:
           devenv tasks run bun:install
           devenv tasks run devenv:pre-commit:install
           devenv tasks run devenv:pre-commit:run
-      - name: Devenv  test
+      - name: Devenv test
         run: devenv test
+      - name: Stryker Mutation Testing
+        shell: devenv shell bash -- -e {0}
+        run: |
+          bun x stryker run

.gitignore

@@ -17,4 +17,8 @@ deno.lock
 node_modules
 
 # pre-commit
-.pre-commit-config.yaml
+.pre-commit-config.yaml
+
+# Stryker
+.stryker-tmp
+reports/

jest.config.js

@@ -0,0 +1,3 @@
+export default {
+  preset: "ts-jest",
+};

package.json

@@ -15,9 +15,12 @@
   "devDependencies": {
     "@eslint/js": "^9.11.1",
     "@jest/globals": "^29.7.0",
+    "@stryker-mutator/jest-runner": "^8.6.0",
+    "@stryker-mutator/typescript-checker": "^8.6.0",
     "eslint": "^9.11.1",
     "fast-check": "^3.22.0",
-    "globals": "^15.9.0",
+    "jest": "^29.7.0",
+    "ts-jest": "^29.2.5",
     "typescript-eslint": "^8.8.0"
   }
 }

stryker.config.mjs

@@ -0,0 +1,11 @@
+// @ts-check
+// @type {import('@stryker-mutator/api/core').PartialStrykerOptions}
+const config = {
+  packageManager: "npm",
+  reporters: ["html", "clear-text", "progress"],
+  checkers: ["typescript"],
+  testRunner: "jest",
+  coverageAnalysis: "perTest",
+  ignorePatterns: [".devenv*", ".direnv"],
+};
+export default config;