feat: migrate auth and state flows to better-auth and convex

test/better-auth-integration.test.js

@@ -0,0 +1,105 @@
+"use strict";
+
+const test = require("node:test");
+const assert = require("node:assert/strict");
+const { createBetterAuthAdapter } = require("../src/integrations/better-auth");
+
+function createMockAuthHandler() {
+  const signedIn = new Set();
+
+  return async function handler(request) {
+    const url = new URL(request.url);
+    const path = url.pathname;
+
+    if (path.endsWith("/sign-in/email")) {
+      return new Response(JSON.stringify({ ok: false }), { status: 401 });
+    }
+
+    if (path.endsWith("/sign-up/email")) {
+      const body = await request.json();
+      const userId = String(body.name);
+      signedIn.add(userId);
+      return new Response(JSON.stringify({ ok: true }), {
+        status: 200,
+        headers: {
+          "content-type": "application/json",
+          "set-cookie": `xartaudio_better_auth=${userId}; Path=/; HttpOnly`,
+        },
+      });
+    }
+
+    if (path.endsWith("/get-session")) {
+      const cookie = request.headers.get("cookie") || "";
+      const match = cookie.match(/xartaudio_better_auth=([^;]+)/);
+      if (!match) {
+        return new Response(JSON.stringify(null), {
+          status: 200,
+          headers: { "content-type": "application/json" },
+        });
+      }
+
+      return new Response(JSON.stringify({
+        user: {
+          id: match[1],
+          name: match[1],
+        },
+      }), {
+        status: 200,
+        headers: { "content-type": "application/json" },
+      });
+    }
+
+    if (path.endsWith("/sign-out")) {
+      return new Response(JSON.stringify({ ok: true }), {
+        status: 200,
+        headers: {
+          "set-cookie": "xartaudio_better_auth=; Path=/; Max-Age=0",
+        },
+      });
+    }
+
+    return new Response("not_found", { status: 404 });
+  };
+}
+
+test("signInDevUser signs up and returns cookie when user does not exist", async () => {
+  const adapter = createBetterAuthAdapter({
+    appBaseUrl: "http://localhost:3000",
+    secret: "test-secret",
+    authHandler: createMockAuthHandler(),
+  });
+
+  const result = await adapter.signInDevUser("alice");
+  assert.match(String(result.setCookie), /xartaudio_better_auth=alice/);
+});
+
+test("getAuthenticatedUserId resolves session user from better-auth endpoint", async () => {
+  const adapter = createBetterAuthAdapter({
+    appBaseUrl: "http://localhost:3000",
+    secret: "test-secret",
+    authHandler: createMockAuthHandler(),
+  });
+
+  const userId = await adapter.getAuthenticatedUserId({
+    cookie: "xartaudio_better_auth=bob",
+  });
+  assert.equal(userId, "bob");
+});
+
+test("handleRoute proxies requests into better-auth handler", async () => {
+  const adapter = createBetterAuthAdapter({
+    appBaseUrl: "http://localhost:3000",
+    secret: "test-secret",
+    authHandler: createMockAuthHandler(),
+  });
+
+  const response = await adapter.handleRoute({
+    method: "POST",
+    path: "/api/auth/sign-out",
+    headers: { cookie: "xartaudio_better_auth=alice" },
+    rawBody: "",
+  });
+
+  assert.equal(response.status, 200);
+  assert.match(String(response.headers["set-cookie"]), /Max-Age=0/);
+});