feat: Implement email/password and X OAuth authentication, replacing the dev-login mechanism.

test/better-auth-integration.test.js

@@ -5,20 +5,13 @@ 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);
+      const userId = String(body.email);
       return new Response(JSON.stringify({ ok: true }), {
         status: 200,
         headers: {
@@ -28,6 +21,28 @@ function createMockAuthHandler() {
       });
     }
 
+    if (path.endsWith("/sign-up/email")) {
+      const body = await request.json();
+      const userId = String(body.email);
+      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("/sign-in/social")) {
+      return new Response(JSON.stringify({ url: "https://x.com/i/oauth2/authorize?state=test" }), {
+        status: 200,
+        headers: {
+          "content-type": "application/json",
+          "set-cookie": "xartaudio_oauth_state=test; Path=/; HttpOnly",
+        },
+      });
+    }
+
     if (path.endsWith("/get-session")) {
       const cookie = request.headers.get("cookie") || "";
       const match = cookie.match(/xartaudio_better_auth=([^;]+)/);
@@ -62,15 +77,33 @@ function createMockAuthHandler() {
   };
 }
 
-test("signInDevUser signs up and returns cookie when user does not exist", async () => {
+test("signInWithEmail returns session cookie", 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/);
+  const result = await adapter.signInWithEmail({
+    email: "alice@example.com",
+    password: "password123",
+  });
+  assert.match(String(result.setCookie), /xartaudio_better_auth=alice@example\.com/);
+});
+
+test("signUpWithEmail returns session cookie", async () => {
+  const adapter = createBetterAuthAdapter({
+    appBaseUrl: "http://localhost:3000",
+    secret: "test-secret",
+    authHandler: createMockAuthHandler(),
+  });
+
+  const result = await adapter.signUpWithEmail({
+    name: "Alice",
+    email: "alice@example.com",
+    password: "password123",
+  });
+  assert.match(String(result.setCookie), /xartaudio_better_auth=alice@example\.com/);
 });
 
 test("getAuthenticatedUserId resolves session user from better-auth endpoint", async () => {
@@ -86,6 +119,23 @@ test("getAuthenticatedUserId resolves session user from better-auth endpoint", a
   assert.equal(userId, "bob");
 });
 
+test("getXAuthorizationUrl returns provider url when x oauth is configured", async () => {
+  const adapter = createBetterAuthAdapter({
+    appBaseUrl: "http://localhost:3000",
+    secret: "test-secret",
+    xOAuthClientId: "x-client-id",
+    xOAuthClientSecret: "x-client-secret",
+    authHandler: createMockAuthHandler(),
+  });
+
+  const result = await adapter.getXAuthorizationUrl({
+    callbackURL: "http://localhost:3000/app",
+  });
+
+  assert.match(result.url, /^https:\/\/x\.com\/i\/oauth2\/authorize/);
+  assert.match(String(result.setCookie), /xartaudio_oauth_state=test/);
+});
+
 test("handleRoute proxies requests into better-auth handler", async () => {
   const adapter = createBetterAuthAdapter({
     appBaseUrl: "http://localhost:3000",