Feat/vitest

e2e/package.json

@@ -44,6 +44,7 @@
     "ts-jest": "29.0.5",
     "ts-loader": "9.4.2",
     "ts-node": "10.9.1",
+    "vitest": "0.31.1",
     "typescript": "5.0.4",
     "webpack": "5.83.1",
     "webpack-cli": "5.1.1"
@@ -68,6 +69,7 @@
     "@stryker-mutator/cucumber-runner": "../packages/cucumber-runner",
     "@stryker-mutator/util": "../packages/util",
     "@stryker-mutator/tap-runner": "../packages/tap-runner",
-    "@stryker-mutator/typescript-checker": "../packages/typescript-checker"
+    "@stryker-mutator/typescript-checker": "../packages/typescript-checker",
+    "@stryker-mutator/vitest-runner": "../packages/vitest-runner"
   }
 }

e2e/test/vitest-noconfig/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "vitest-noconfig",
+  "version": "0.0.0",
+  "private": true,
+  "description": "A module to perform an integration test",
+  "main": "index.js",
+  "scripts": {
+    "pretest": "rimraf \"reports\"",
+    "test": "stryker run",
+    "posttest": "mocha --no-config --no-package --timeout 0 verify/verify.js",
+    "test:unit": "vitest run"
+  },
+  "author": "",
+  "license": "ISC"
+}

e2e/test/vitest-noconfig/src/math.ts

@@ -0,0 +1,20 @@
+export function add(num1: number, num2: number) {
+  return num1 + num2;
+}
+
+export function addOne(number: number) {
+  number++;
+  return number;
+}
+
+export function negate(number: number) {
+  return -number;
+}
+
+export function isNegativeNumber(number: number) {
+  var isNegative = false;
+  if (number < 0) {
+    isNegative = true;
+  }
+  return isNegative;
+}

e2e/test/vitest-noconfig/stryker.conf.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "../../node_modules/@stryker-mutator/core/schema/stryker-schema.json",
+  "testRunner": "vitest",
+  "concurrency": 1,
+  "coverageAnalysis": "perTest",
+  "reporters": ["json", "clear-text", "html", "event-recorder"],
+  "plugins": [
+    "@stryker-mutator/vitest-runner"
+  ]
+}

e2e/test/vitest-noconfig/tests/math.spec.ts

@@ -0,0 +1,40 @@
+import { add, addOne, isNegativeNumber, negate } from '../src/math';
+import { expect, test, describe } from 'vitest';
+
+describe('math', () => {
+  test('should be able to add two numbers', function () {
+    var num1 = 2;
+    var num2 = 5;
+    var expected = num1 + num2;
+
+    var actual = add(num1, num2);
+
+    expect(actual).toBe(expected);
+  });
+
+  test('should be able to add one to a number', function () {
+    var number = 2;
+    var expected = 3;
+
+    var actual = addOne(number);
+
+    expect(actual).toBe(expected);
+  });
+
+  test('should be able negate a number', function () {
+    var number = 2;
+    var expected = -2;
+
+    var actual = negate(number);
+
+    expect(actual).toBe(expected);
+  });
+
+  test('should be able to recognize a negative number', function () {
+    var number = -2;
+
+    var isNegative = isNegativeNumber(number);
+
+    expect(isNegative).toBe(true);
+  });
+});

e2e/test/vitest-noconfig/verify/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

e2e/test/vitest-noconfig/verify/verify.js

@@ -0,0 +1,7 @@
+import { expectMetricsJsonToMatchSnapshot } from '../../../helpers.js';
+
+describe('Verify stryker has ran correctly', () => {
+  it('should report correct score', async () => {
+    await expectMetricsJsonToMatchSnapshot();
+  });
+});

e2e/test/vitest-noconfig/verify/verify.js.snap

@@ -0,0 +1,22 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Verify stryker has ran correctly should report correct score 1`] = `
+Object {
+  "compileErrors": 0,
+  "ignored": 0,
+  "killed": 11,
+  "mutationScore": 78.57142857142857,
+  "mutationScoreBasedOnCoveredCode": 78.57142857142857,
+  "noCoverage": 0,
+  "pending": 0,
+  "runtimeErrors": 0,
+  "survived": 3,
+  "timeout": 0,
+  "totalCovered": 14,
+  "totalDetected": 11,
+  "totalInvalid": 0,
+  "totalMutants": 14,
+  "totalUndetected": 3,
+  "totalValid": 14,
+}
+`;