Refer to constant values from api/v1/apps request spec (#33488)

spec/models/doorkeeper/application_spec.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Doorkeeper::Application do
+  describe 'Associations' do
+    it { is_expected.to have_many(:created_users).class_name('User').inverse_of(:created_by_application).with_foreign_key(:created_by_application_id) }
+  end
+
+  describe 'Validations' do
+    it { is_expected.to validate_length_of(:name).is_at_most(described_class::APP_NAME_LIMIT) }
+    it { is_expected.to validate_length_of(:redirect_uri).is_at_most(described_class::APP_REDIRECT_URI_LIMIT) }
+    it { is_expected.to validate_length_of(:website).is_at_most(described_class::APP_WEBSITE_LIMIT) }
+  end
+end

spec/requests/api/v1/apps_spec.rb

@@ -122,7 +122,7 @@ RSpec.describe 'Apps' do
     end
 
     context 'with a too-long name' do
-      let(:client_name) { 'hoge' * 20 }
+      let(:client_name) { 'a' * Doorkeeper::Application::APP_NAME_LIMIT * 2 }
 
       it 'returns http unprocessable entity' do
         subject
@@ -134,7 +134,7 @@ RSpec.describe 'Apps' do
     end
 
     context 'with a too-long website' do
-      let(:website) { "https://foo.bar/#{'hoge' * 2_000}" }
+      let(:website) { "https://foo.bar/#{'a' * Doorkeeper::Application::APP_WEBSITE_LIMIT * 2}" }
 
       it 'returns http unprocessable entity' do
         subject
@@ -146,7 +146,7 @@ RSpec.describe 'Apps' do
     end
 
     context 'with a too-long redirect_uri' do
-      let(:redirect_uris) { "https://app.example/#{'hoge' * 2_000}" }
+      let(:redirect_uris) { "https://app.example/#{'a' * Doorkeeper::Application::APP_REDIRECT_URI_LIMIT * 2}" }
 
       it 'returns http unprocessable entity' do
         subject