use Vitest for test runner (#948)

Author: drwpow

.github/workflows/ci.yml

@@ -34,4 +34,4 @@ jobs:
       - run: npm run test:coverage
         if: matrix.os == 'macos-12' && matrix.node-version == '18.x'
       - uses: codecov/codecov-action@v3
-        if: matrix.os == 'macos-16' && matrix.node-version == '18.x'
+        if: matrix.os == 'macos-12' && matrix.node-version == '18.x'

CONTRIBUTING.md

@@ -62,10 +62,26 @@ _Also if this appears in `examples/` feel free to update that, too!_
 
 ## Testing
 
+Tests use [Vitest](https://vitest.dev), a modern test-runner based on Jest. To run the tests locally, run:
+
 ```
 npm test
 ```
 
+To run an individual test:
+
+```
+npx vitest [part of filename]
+```
+
+Or to start all tests in watch mode:
+
+```
+npx vitest
+```
+
+[See docs](https://vitest.dev)
+
 ## Help needed
 
 Please check out the [the open issues][issues]. Issues labelled [**Help Wanted**][help-wanted] and [**Good First

package.json

@@ -40,8 +40,8 @@
     "lint": "eslint .",
     "prepare": "npm run build",
     "pregenerate": "npm run build",
-    "test": "mocha --recursive --timeout 30000",
-    "test:coverage": "nyc --reporter=lcov mocha --recursive --timeout 30000",
+    "test": "vitest run",
+    "test:coverage": "vitest run --coverage",
     "version": "npm run build"
   },
   "dependencies": {
@@ -59,14 +59,14 @@
     "@types/prettier": "^2.7.1",
     "@typescript-eslint/eslint-plugin": "^5.38.1",
     "@typescript-eslint/parser": "^5.38.1",
-    "chai": "^4.3.6",
+    "@vitest/coverage-c8": "^0.23.4",
     "del-cli": "^4.0.1",
     "eol": "^0.9.1",
     "eslint": "^8.24.0",
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-prettier": "^4.2.1",
-    "mocha": "^9.2.2",
     "nyc": "^15.1.0",
-    "typescript": "^4.8.4"
+    "typescript": "^4.8.4",
+    "vitest": "^0.23.4"
   }
 }