work on tests

test/controllers/users_controller_test.rb

@@ -1,5 +1,22 @@
 require 'test_helper'
 
 class UsersControllerTest < ActionDispatch::IntegrationTest
-  
+
+  test 'can signup for greenlight account.' do
+    post signup_path, params: {
+      user: {
+        name: "Greenlight User",
+        username: "greenlight_user",
+        email: "greenlight@example.com",
+        password: "password",
+        password_confirmation: "password"
+      }
+    }
+
+    user = User.find_by(email: "greenlight@example.com")
+
+    assert_not_nil user
+    assert_redirected_to room_path(user.room.uid)
+    assert user.id, session[:user_id]
+  end
 end