Use default argument when testing generators without the need for extra args

railties/test/generators/app_generator_test.rb

@@ -253,7 +253,7 @@ def test_config_jdbc_database
 
   def test_config_jdbc_database_when_no_option_given
     if defined?(JRUBY_VERSION)
-      run_generator([destination_root])
+      run_generator
       assert_file "config/database.yml", /sqlite3/
       assert_gem "activerecord-jdbcsqlite3-adapter"
     end
@@ -295,7 +295,7 @@ def test_generator_if_skip_sprockets_is_given
   end
 
   def test_inclusion_of_javascript_runtime
-    run_generator([destination_root])
+    run_generator
     if defined?(JRUBY_VERSION)
       assert_gem "therubyrhino"
     else
@@ -398,7 +398,7 @@ def test_no_active_record_or_test_unit_if_skips_given
   end
 
   def test_new_hash_style
-    run_generator [destination_root]
+    run_generator
     assert_file "config/initializers/session_store.rb" do |file|
       assert_match(/config.session_store :cookie_store, key: '_.+_session'/, file)
     end

railties/test/generators/plugin_generator_test.rb

@@ -95,7 +95,7 @@ def test_generating_adds_dummy_app_rake_tasks_without_unit_test_files
   end
 
   def test_generating_adds_dummy_app_without_javascript_and_assets_deps
-    run_generator [destination_root]
+    run_generator
 
     assert_file "test/dummy/app/assets/stylesheets/application.css"
 
@@ -335,7 +335,7 @@ def test_creating_plugin_in_app_directory_adds_gemfile_entry
     Object.const_set('APP_PATH', Rails.root)
     FileUtils.touch gemfile_path
 
-    run_generator [destination_root]
+    run_generator
 
     assert_file gemfile_path, /gem 'bukkits', path: 'tmp\/bukkits'/
   ensure
@@ -376,7 +376,7 @@ def test_git_name_and_email_in_gemspec_file
     name = `git config user.name`.chomp rescue "TODO: Write your name"
     email = `git config user.email`.chomp rescue "TODO: Write your email address"
 
-    run_generator [destination_root]
+    run_generator
     assert_file "bukkits.gemspec" do |contents|
       assert_match name, contents
       assert_match email, contents
@@ -386,7 +386,7 @@ def test_git_name_and_email_in_gemspec_file
   def test_git_name_in_license_file
     name = `git config user.name`.chomp rescue "TODO: Write your name"
 
-    run_generator [destination_root]
+    run_generator
     assert_file "MIT-LICENSE" do |contents|
       assert_match name, contents
     end