test(env): Use vitest in integration tests

.eslintrc

@@ -66,7 +66,8 @@
         ".mjs",
         ".json",
         ".node"
-      ]
+      ],
+      "allowModules": ["vitest", "vitest/config"]
     }
   },
   "overrides": [
@@ -127,7 +128,9 @@
             "@kosko/env",
             "@kosko/generate",
             "@kosko/template",
-            "@kosko/yaml"
+            "@kosko/yaml",
+            "vitest",
+            "vitest/config"
           ]
         }
       }

internal/vitest-config/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "@kosko/vitest-config",
+  "version": "0.0.0",
+  "private": true,
+  "sideEffects": false,
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc"
+  },
+  "engines": {
+    "node": ">=18"
+  },
+  "devDependencies": {
+    "typescript": "^5.3.3"
+  },
+  "peerDependencies": {
+    "vitest": "^1.2.2"
+  }
+}

internal/vitest-config/src/index.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    include: ["**/__tests__/**/*.{js,ts}"]
+  }
+});

internal/vitest-config/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "module": "commonjs",
+    "declaration": true
+  },
+  "include": ["src"]
+}

jest.integration.config.ts

@@ -2,7 +2,7 @@
 import type { Config } from "jest";
 
 const config: Config = {
-  projects: ["<rootDir>/packages/*/integration"]
+  projects: ["<rootDir>/packages/*/integration/jest.config.js"]
 };
 
 export default config;

package.json

@@ -18,7 +18,9 @@
     "watch": "npm run build -- --watch",
     "test": "npm-run-all test:*",
     "test:unit": "cross-env BUILD_TARGET=node ESM_IMPORT_DISABLED=1 jest",
-    "test:integration": "jest --config jest.integration.config.ts",
+    "test:integration": "npm-run-all test:integration:*",
+    "test:integration:jest": "jest --config jest.integration.config.ts",
+    "test:integration:vitest": "vitest --workspace vitest.integration.workspace.ts",
     "test:browser": "jest --config integration/browser/jest.config.js",
     "preinstall": "npx only-allow pnpm",
     "prepare": "husky install",
@@ -67,6 +69,7 @@
     "turbo": "^1.8.8",
     "typescript": "^5.3.3",
     "verdaccio": "^5.19.0",
+    "vitest": "^1.2.2",
     "webpack": "^5.76.0",
     "webpack-cli": "^4.10.0"
   },

packages/env/integration/esm/__tests__/__snapshots__/index.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
 exports[`should load CJS file 1`] = `"{ type: 'file', ext: 'cjs' }"`;
 

packages/env/integration/esm/__tests__/index.ts

@@ -1,5 +1,6 @@
 import { dirname, join } from "node:path";
 import execa, { NodeOptions } from "execa";
+import { expect, test } from "vitest";
 
 const testDir = dirname(__dirname);
 

packages/env/integration/vitest.config.ts

@@ -0,0 +1 @@
+export { default } from "@kosko/vitest-config";

packages/env/package.json

@@ -56,9 +56,11 @@
     "@kosko/build-scripts": "workspace:^",
     "@kosko/jest-preset": "workspace:^",
     "@kosko/test-utils": "workspace:^",
+    "@kosko/vitest-config": "workspace:^",
     "@types/node": "^18.11.14",
     "execa": "^5.1.1",
     "ts-node": "^10.9.2",
-    "typescript": "^5.3.3"
+    "typescript": "^5.3.3",
+    "vitest": "^1.2.2"
   }
 }