Add support for Jest

.github/workflows/ci.yml

@@ -56,3 +56,20 @@ jobs:
               run: npm run build
             - name: Test
               run: npm run test:mocha
+
+    test-jest:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                jest: ['28.0', '29.0']
+        steps:
+            - uses: actions/checkout@v4
+            - uses: actions/setup-node@v4
+            - name: Install Packages
+              run: npm ci
+            - run: npm i jest@${{ matrix.jest }}
+            - run: npx jest --version
+            - name: Build
+              run: npm run build
+            - name: Test
+              run: npm run test:jest

README.md

@@ -11,7 +11,7 @@ npm install --save-dev eslint-snapshot-rule-tester
 > **Requirements**
 > - ESLint v8.4.0 or above
 > - Node.js v18.x or above
-> - Mocha v6.0.0 or above
+> - Mocha v6.0.0 or above OR Jest v28.0.0 or above
 
 ## Usage
 
@@ -57,12 +57,13 @@ Output:
 ---
 ```
 
-For the full example, see the [test file here](https://github.com/RunDevelopment/eslint-snapshot-rule-tester/blob/main/tests/mocha/no-strings.ts) and [snapshot file here](https://github.com/RunDevelopment/eslint-snapshot-rule-tester/blob/main/tests/mocha/__snapshots__/no-strings.ts.snap).
+For the full example, see the [test file here](https://github.com/RunDevelopment/eslint-snapshot-rule-tester/blob/main/tests/mocha/no-strings.ts) and [snapshot file here](https://github.com/RunDevelopment/eslint-snapshot-rule-tester/blob/main/tests/mocha/__snapshots__/no-strings.ts.eslintsnap).
 
 ### Updating snapshots
 
-To update snapshots, run the tests with the `--update` flag:
+To update snapshots, run the tests with the `--update` or `-u` flag:
 
 ```sh
 mocha tests/**/*.js --update
+jest -u
 ```

jest.config.js

@@ -0,0 +1,5 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+};