Fix OAuth2 test

test/integration/oauth2_test.rb

@@ -1,22 +1,22 @@
 require "test_helper"
 require "oauth2"
 
-class OAuth2Test < ActiveSupport::TestCase
+class OAuth2Test < ActionDispatch::IntegrationTest
   attr_accessor :password, :user, :app, :client
 
   setup do
-    @password = "123123"
-    @user = FactoryBot.create(:user, password: password, password_confirmation: password)
-    @app = FactoryBot.create(:application)
-    @client = OAuth2::Client.new(@app.uid, @app.secret) do |b|
+    @password = "password"
+    @user = create(:user, password: password, password_confirmation: password)
+    @app = create(:application)
+    @client = OAuth2::Client.new(@app.uid, @app.secret, site: "http://localhost") do |b|
       b.request :url_encoded
       b.adapter :rack, Rails.application
     end
   end
 
   test "auth_code" do
     test_url = "/api/v3/hello.json"
-    grant = FactoryBot.create(:access_grant, application: app, redirect_uri: "#{app.redirect_uri}/callback")
+    grant = create(:access_grant, application: app, redirect_uri: "#{app.redirect_uri}/callback")
 
     assert_changes -> { Doorkeeper::AccessToken.count }, 1 do
       @access_token = client.auth_code.get_token(grant.token, redirect_uri: grant.redirect_uri)
@@ -34,7 +34,7 @@ class OAuth2Test < ActiveSupport::TestCase
     assert_not_equal @access_token.token, @new_token.token
 
     # Revoke a new access_token, old access_token will invalid
-    grant = FactoryBot.create(:access_grant, application: app, redirect_uri: "#{app.redirect_uri}/callback")
+    grant = create(:access_grant, application: app, redirect_uri: "#{app.redirect_uri}/callback")
     @access_token1 = client.auth_code.get_token(grant.token, redirect_uri: grant.redirect_uri)
 
     assert_raise OAuth2::Error do