Use jest for testing

.babelrc

@@ -0,0 +1,12 @@
+{
+  "presets": [
+    "@babel/preset-env",
+    "babel-preset-solid",
+    [
+      "@babel/preset-typescript",
+      {
+        "onlyRemoveTypeImports": true
+      }
+    ]
+  ]
+}

.eslintrc

@@ -4,7 +4,7 @@
 	"plugins": ["@typescript-eslint", "no-only-tests", "eslint-comments"],
 	"ignorePatterns": ["node_modules", "dist"],
 	"parserOptions": {
-		"project": ["./tsconfig.json", "./tsconfig.node.json"],
+		"project": ["./tsconfig.json", "./tsconfig.node.json", "./test/tsconfig.json"],
 		"tsconfigRootDir": ".",
 		"sourceType": "module"
 	},

jest.config.cjs

@@ -0,0 +1,33 @@
+/** @type {import('@jest/types').Config.InitialOptions} */
+const common_config = {
+	/*
+	to support NodeNext module imports
+	https://stackoverflow.com/questions/73735202/typescript-jest-imports-with-js-extension-cause-error-cannot-find-module
+	*/
+	globals: {"ts-jest": {useESM: true}},
+	moduleNameMapper: {
+		"(.+)\\.js": "$1",
+		"(.+)\\.jsx": "$1",
+	},
+	extensionsToTreatAsEsm: [".ts", ".tsx"],
+}
+
+/** @type {import('@jest/types').Config.InitialOptions} */
+const client_config = {
+	...common_config,
+	testEnvironment: "jsdom",
+	preset: "solid-jest/preset/browser",
+	testMatch: ["<rootDir>/test/**/*.test.(js|ts)?(x)"],
+	testPathIgnorePatterns: ["/node_modules/", "ssr"],
+	setupFilesAfterEnv: ["<rootDir>/test/waapi-polyfill.js"],
+}
+
+/** @type {import('@jest/types').Config.InitialOptions} */
+const server_config = {
+	...common_config,
+	preset: "solid-jest/preset/node",
+	testMatch: ["<rootDir>/test/ssr.test.(js|ts)?(x)"],
+}
+
+/** @type {import('@jest/types').Config.InitialOptions} */
+module.exports = process.env["SSR"] ? server_config : client_config

package.json

@@ -10,9 +10,9 @@
 	"scripts": {
 		"prepublishOnly": "pnpm build",
 		"build": "tsup",
-		"test": "pnpm run test:client & pnpm run test:ssr",
-		"test:client": "vitest",
-		"test:ssr": "vitest --mode ssr",
+		"test": "pnpm run test:client && pnpm run test:ssr",
+		"test:client": "jest --config jest.config.cjs",
+		"test:ssr": "SSR=true jest --config jest.config.cjs",
 		"format": "prettier --cache -w .",
 		"lint": "pnpm run lint:code & pnpm run lint:types",
 		"lint:code": "eslint --ignore-path .gitignore --max-warnings 0 src/**/*.{js,ts,tsx,jsx}",
@@ -47,21 +47,27 @@
 		"csstype": "^3.1.0"
 	},
 	"devDependencies": {
+		"@babel/preset-env": "^7.23.7",
+		"@babel/preset-typescript": "^7.23.3",
+		"@jest/types": "^29.6.3",
 		"@solidjs/testing-library": "^0.8.5",
+		"@types/jest": "^29.5.11",
 		"@types/node": "^20.10.6",
 		"@typescript-eslint/eslint-plugin": "^6.17.0",
 		"@typescript-eslint/parser": "^6.17.0",
+		"babel-jest": "^29.7.0",
+		"babel-preset-solid": "^1.8.6",
 		"eslint": "^8.56.0",
 		"eslint-plugin-eslint-comments": "^3.2.0",
 		"eslint-plugin-no-only-tests": "^3.1.0",
-		"jsdom": "^23.0.1",
+		"jest": "^29.7.0",
+		"jest-environment-jsdom": "^29.7.0",
 		"prettier": "^3.1.1",
+		"solid-jest": "^0.2.0",
 		"solid-js": "^1.8.7",
 		"tsup": "^8.0.1",
 		"tsup-preset-solid": "^2.2.0",
-		"typescript": "^5.3.3",
-		"vite-plugin-solid": "^2.8.0",
-		"vitest": "^1.1.1"
+		"typescript": "^5.3.3"
 	},
 	"peerDependencies": {
 		"solid-js": "^1.8.0"