1 files changed, 15 insertions, 0 deletions
diff --git a/actionpack/test/dispatch/mime_type_test.rb b/actionpack/test/dispatch/mime_type_test.rb
index bb3d888e30..50f6c06fee 100644
--- a/actionpack/test/dispatch/mime_type_test.rb
+++ b/actionpack/test/dispatch/mime_type_test.rb
@@ -181,6 +181,13 @@ class MimeTypeTest < ActiveSupport::TestCase
     assert_equal "video/*", Mime::Type.new("video/*").to_s
   end
 
+  test "can be initialized with parameters" do
+    assert_equal "text/html; parameter", Mime::Type.new("text/html; parameter").to_s
+    assert_equal "text/html; parameter=abc", Mime::Type.new("text/html; parameter=abc").to_s
+    assert_equal 'text/html; parameter="abc"', Mime::Type.new('text/html; parameter="abc"').to_s
+    assert_equal 'text/html; parameter=abc; parameter2="xyz"', Mime::Type.new('text/html; parameter=abc; parameter2="xyz"').to_s
+  end
+
   test "invalid mime types raise error" do
     assert_raises Mime::Type::InvalidMimeType do
       Mime::Type.new("too/many/slash")
@@ -191,6 +198,14 @@ class MimeTypeTest < ActiveSupport::TestCase
     end
 
     assert_raises Mime::Type::InvalidMimeType do
+      Mime::Type.new("improper/semicolon;")
+    end
+
+    assert_raises Mime::Type::InvalidMimeType do
+      Mime::Type.new('improper/semicolon; parameter=abc; parameter2="xyz";')
+    end
+
+    assert_raises Mime::Type::InvalidMimeType do
       Mime::Type.new("text/html, text/plain")
     end