feat: basic test setup

.gitignore

@@ -31,6 +31,7 @@ dist
 packages/next-auth/providers
 packages/next-auth/src/providers/oauth-types.ts
 packages/*/*.js
+!vite.config.js
 packages/*/*.d.ts
 packages/*/*.d.ts.map
 packages/*/lib

packages/core/package.json

@@ -81,6 +81,7 @@
     "clean": "rm -rf *.js *.d.ts* lib providers",
     "css": "node scripts/generate-css",
     "dev": "pnpm css && pnpm providers && tsc -w",
+    "test": "vitest",
     "providers": "node scripts/generate-providers"
   },
   "devDependencies": {
@@ -89,7 +90,10 @@
     "@types/nodemailer": "6.4.6",
     "@types/react": "18.0.37",
     "autoprefixer": "10.4.13",
+    "msw": "^2.0.9",
     "postcss": "8.4.19",
-    "postcss-nested": "6.0.0"
+    "postcss-nested": "6.0.0",
+    "vite": "^5.0.2",
+    "vitest": "^0.25.3"
   }
 }

packages/core/src/test/session.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, it } from "vitest"
+
+
+describe("suite", () => {
+  it("msw mock http://hello", async () => {
+    const reponse = await fetch(
+      "https://next-auth-example.com/api/auth/session"
+    )
+    const data = await reponse.json()
+    expect(data).toEqual({
+      user: {
+        name: "John Doe",
+        email: "[email protected]",
+        image: "https://next-auth-example.com/avatar.jpg",
+      },
+    })
+  })
+})
+

packages/core/src/test/setup.ts

@@ -0,0 +1,30 @@
+import { afterAll, afterEach, beforeAll } from "vitest"
+import { setupServer } from "msw/node"
+import { HttpResponse, http } from "msw"
+
+const authOptions = [
+
+]
+
+export const restHandlers = [
+  http.get("https://next-auth-example.com/api/auth/session", () => {
+    return HttpResponse.json({
+      user: {
+        name: "John Doe",
+        email: "[email protected]",
+        image: "https://next-auth-example.com/avatar.jpg",
+      },
+    })
+  }),
+]
+
+const server = setupServer(...restHandlers)
+
+// Start server before all tests
+beforeAll(() => server.listen({ onUnhandledRequest: "error" }))
+
+//  Close server after all tests
+afterAll(() => server.close())
+
+// Reset handlers after each test `important for test isolation`
+afterEach(() => server.resetHandlers())

packages/core/vite.config.js

@@ -0,0 +1,11 @@
+/// <reference types="vitest" />
+
+import { defineConfig } from 'vite'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [],
+  test: {
+    setupFiles: ['./src/test/setup.ts'],
+  },
+})