Added settings for jest

.vscode/settings.json

@@ -3,5 +3,7 @@
 	"editor.formatOnSave": true,
 	"editor.insertSpaces": false,
 	"editor.smoothScrolling": true,
-	"editor.defaultFormatter": "esbenp.prettier-vscode"
+	"editor.defaultFormatter": "esbenp.prettier-vscode",
+
+	"jest.jestCommandLine": "node --no-warnings ./node_modules/.bin/jest -c jest.config.cjs --runInBand --silent"
 }

jest.config.cjs

@@ -0,0 +1,11 @@
+// @ts-check
+
+/**
+ * @type {import("jest").Config}
+ */
+
+module.exports = {
+	moduleFileExtensions: ["js", "mjs", "cjs"],
+	testEnvironment: "node",
+	testMatch: ["**/specs/**/*.spec.cjs"],
+};

package.json

@@ -9,7 +9,7 @@
 		"build:src": "rimraf lib && npx tsc -p tsconfig.dist.json",
 		"build:spec": "rimraf \"./spec/*.!(ts)\" && npx tsc -p tsconfig.spec.json",
 		"prepublishOnly": "npm run build",
-		"test": "NODE_OPTIONS=\"--experimental-vm-modules --no-warnings\" jest -c jest.config.mjs --silent"
+		"test": "NODE_OPTIONS=\"--experimental-vm-modules --no-warnings\" jest -c jest.config.cjs --silent"
 	},
 	"author": "Alexander Patrick Cerutti",
 	"license": "MIT",