switch from jest to vitest

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

__tests__/context.test.ts

@@ -1,23 +1,23 @@
-import {beforeEach, describe, expect, jest, test} from '@jest/globals';
+import {beforeEach, describe, expect, vi, test} from 'vitest';
 import * as fs from 'fs';
+import * as os from 'os';
 import * as path from 'path';
 
 import {Context} from '@docker/actions-toolkit/lib/context';
 
 import * as context from '../src/context';
 
-// prettier-ignore
+const tmpDir = fs.mkdtempSync(path.join(process.env.TEMP || os.tmpdir(), 'context-'));
-const tmpDir = path.join(process.env.TEMP || '/tmp', 'setup-compose-jest');
+const tmpName = path.join(tmpDir, '.tmpname-vi');
-const tmpName = path.join(tmpDir, '.tmpname-jest');
 
-jest.spyOn(Context, 'tmpDir').mockImplementation((): string => {
+vi.spyOn(Context, 'tmpDir').mockImplementation((): string => {
   if (!fs.existsSync(tmpDir)) {
     fs.mkdirSync(tmpDir, {recursive: true});
   }
   return tmpDir;
 });
 
-jest.spyOn(Context, 'tmpName').mockImplementation((): string => {
+vi.spyOn(Context, 'tmpName').mockImplementation((): string => {
   return tmpName;
 });
 

__tests__/setup.unit.ts

@@ -0,0 +1,12 @@
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+
+const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'docker-actions-toolkit-'));
+
+process.env = Object.assign({}, process.env, {
+  TEMP: tmpDir,
+  GITHUB_REPOSITORY: 'docker/setup-compose-action',
+  RUNNER_TEMP: path.join(tmpDir, 'runner-temp'),
+  RUNNER_TOOL_CACHE: path.join(tmpDir, 'runner-tool-cache')
+});

dev.Dockerfile

@@ -74,7 +74,7 @@ FROM deps AS test
 RUN --mount=type=bind,target=.,rw \
   --mount=type=cache,target=/src/.yarn/cache \
   --mount=type=cache,target=/src/node_modules \
-  yarn run test --coverage --coverageDirectory=/tmp/coverage
+  yarn run test --coverage --coverage.reportsDirectory=/tmp/coverage
 
 FROM scratch AS test-coverage
 COPY --from=test /tmp/coverage /

eslint.config.js

@@ -2,7 +2,7 @@
 const {defineConfig, globalIgnores} = require('eslint/config');
 const {fixupConfigRules, fixupPluginRules} = require('@eslint/compat');
 const typescriptEslint = require('@typescript-eslint/eslint-plugin');
-const jestPlugin = require('eslint-plugin-jest');
+const vitestPlugin = require('@vitest/eslint-plugin');
 const prettier = require('eslint-plugin-prettier');
 const globals = require('globals');
 const tsParser = require('@typescript-eslint/parser');
@@ -25,21 +25,21 @@ module.exports = defineConfig([
         'eslint:recommended',
         'plugin:@typescript-eslint/eslint-recommended',
         'plugin:@typescript-eslint/recommended',
-        'plugin:jest/recommended',
+        'plugin:@vitest/legacy-recommended',
         'plugin:prettier/recommended'
       )
     ),
 
     plugins: {
       '@typescript-eslint': fixupPluginRules(typescriptEslint),
-      jest: fixupPluginRules(jestPlugin),
+      '@vitest': fixupPluginRules(vitestPlugin),
       prettier: fixupPluginRules(prettier)
     },
 
     languageOptions: {
       globals: {
         ...globals.node,
-        ...globals.jest
+        ...vitestPlugin.environments.env.globals
       },
       parser: tsParser,
       ecmaVersion: 'latest',

jest.config.js

@@ -1,29 +0,0 @@
-/* eslint-disable @typescript-eslint/no-require-imports */
-const fs = require('fs');
-const os = require('os');
-const path = require('path');
-
-const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'docker-setup-compose-action-')).split(path.sep).join(path.posix.sep);
-
-process.env = Object.assign({}, process.env, {
-  TEMP: tmpDir,
-  GITHUB_REPOSITORY: 'docker/setup-compose-action',
-  RUNNER_TEMP: path.join(tmpDir, 'runner-temp').split(path.sep).join(path.posix.sep),
-  RUNNER_TOOL_CACHE: path.join(tmpDir, 'runner-tool-cache').split(path.sep).join(path.posix.sep)
-});
-
-module.exports = {
-  clearMocks: true,
-  testEnvironment: 'node',
-  moduleFileExtensions: ['js', 'ts'],
-  testMatch: ['**/*.test.ts'],
-  transform: {
-    '^.+\\.ts$': 'ts-jest'
-  },
-  moduleNameMapper: {
-    '^csv-parse/sync': '<rootDir>/node_modules/csv-parse/dist/cjs/sync.cjs'
-  },
-  collectCoverageFrom: ['src/**/{!(main.ts),}.ts'],
-  coveragePathIgnorePatterns: ['lib/', 'node_modules/', '__tests__/'],
-  verbose: true
-};

package.json

@@ -10,7 +10,7 @@
     "eslint:fix": "eslint --fix .",
     "prettier": "prettier --check \"./**/*.ts\"",
     "prettier:fix": "prettier --write \"./**/*.ts\"",
-    "test": "jest"
+    "test": "vitest run"
   },
   "repository": {
     "type": "git",
@@ -36,14 +36,14 @@
     "@typescript-eslint/eslint-plugin": "^8.50.0",
     "@typescript-eslint/parser": "^8.50.0",
     "@vercel/ncc": "^0.38.4",
+    "@vitest/coverage-v8": "^4.0.18",
+    "@vitest/eslint-plugin": "^1.6.9",
     "eslint": "^9.39.2",
     "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-jest": "^29.5.0",
     "eslint-plugin-prettier": "^5.5.4",
-    "jest": "^30.2.0",
     "prettier": "^3.7.4",
-    "ts-jest": "^29.4.6",
     "ts-node": "^10.9.2",
-    "typescript": "^5.9.3"
+    "typescript": "^5.9.3",
+    "vitest": "^4.0.18"
   }
 }

tsconfig.json

@@ -16,6 +16,6 @@
     "./__tests__/**/*",
     "./lib/**/*",
     "node_modules",
-    "jest.config.ts"
+    "vitest.config.ts"
   ]
 }

vitest.config.ts

@@ -0,0 +1,32 @@
+/**
+ * Copyright 2026 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {defineConfig} from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    clearMocks: true,
+    environment: 'node',
+    setupFiles: ['./__tests__/setup.unit.ts'],
+    include: ['**/*.test.ts'],
+    coverage: {
+      provider: 'v8',
+      reporter: ['clover'],
+      include: ['src/**/*.ts'],
+      exclude: ['src/**/main.ts', '__tests__/**', 'dist/**']
+    }
+  }
+});