2 files changed, 51 insertions, 0 deletions
diff --git a/railties/test/application/rake/dev_test.rb b/railties/test/application/rake/dev_test.rb
new file mode 100644
index 0000000000..28d8b22a37
--- /dev/null
+++ b/railties/test/application/rake/dev_test.rb
@@ -0,0 +1,35 @@
+require 'isolation/abstract_unit'
+
+module ApplicationTests
+  module RakeTests
+    class RakeDevTest < ActiveSupport::TestCase
+      include ActiveSupport::Testing::Isolation
+
+      def setup
+        build_app
+        boot_rails
+      end
+
+      def teardown
+        teardown_app
+      end
+
+      test 'dev:cache creates file and outputs message' do
+        Dir.chdir(app_path) do
+          output = `rake dev:cache`
+          assert File.exist?('tmp/caching-dev.txt')
+          assert_match(/Development mode is now being cached/, output)
+        end
+      end
+
+      test 'dev:cache deletes file and outputs message' do
+        Dir.chdir(app_path) do
+          output = `rake dev:cache`        
+          output = `rake dev:cache`
+          assert_not File.exist?('tmp/caching-dev.txt')
+          assert_match(/Development mode is no longer being cached/, output)
+        end
+      end
+    end
+  end
+end
diff --git a/railties/test/commands/server_test.rb b/railties/test/commands/server_test.rb
index ba688f1e9e..7a063aeddf 100644
--- a/railties/test/commands/server_test.rb
+++ b/railties/test/commands/server_test.rb
@@ -44,6 +44,22 @@ class Rails::ServerTest < ActiveSupport::TestCase
     end
   end
 
+  def test_caching_without_option
+    args = []
+    options = Rails::Server::Options.new.parse!(args)
+    assert_equal nil, options[:caching]
+  end
+
+  def test_caching_with_option
+    args = ["--dev-caching"]
+    options = Rails::Server::Options.new.parse!(args)
+    assert_equal true, options[:caching]
+
+    args = ["--no-dev-caching"]
+    options = Rails::Server::Options.new.parse!(args)
+    assert_equal false, options[:caching]
+  end
+
   def test_log_stdout
     with_rack_env nil do
       with_rails_env nil do