Add specs for Response#finish, including status code 205

test/response_test.rb

@@ -27,7 +27,7 @@ class ResponseTest < Minitest::Test
     assert_equal 'Hello World', @response.body.join
   end
 
-  [204, 304].each do |status_code|
+  [204, 205, 304].each do |status_code|
     it "removes the Content-Type header and body when response status is #{status_code}" do
       @response.status = status_code
       @response.body = ['Hello World']
@@ -35,6 +35,19 @@ class ResponseTest < Minitest::Test
     end
   end
 
+  [200, 201, 202, 301, 302, 400, 401, 403, 404, 500].each do |status_code|
+    it "will not removes the Content-Type header and body when response status
+        is #{status_code}" do
+      @response.status = status_code
+      @response.body   = ['Hello World']
+      assert_equal [
+        status_code,
+        { 'Content-Type' => 'text/html', 'Content-Length' => '11' },
+        ['Hello World']
+      ], @response.finish
+    end
+  end
+
   it 'Calculates the Content-Length using the bytesize of the body' do
     @response.body = ['Hello', 'World!', '✈']
     _, headers, body = @response.finish