1 files changed, 25 insertions, 0 deletions
diff --git a/actionpack/test/dispatch/header_test.rb b/actionpack/test/dispatch/header_test.rb
index ec6ba494dc..42432510c3 100644
--- a/actionpack/test/dispatch/header_test.rb
+++ b/actionpack/test/dispatch/header_test.rb
@@ -7,10 +7,35 @@ class HeaderTest < ActiveSupport::TestCase
     )
   end
 
+  def test_each
+    headers = []
+    @headers.each { |pair| headers << pair }
+    assert_equal [["HTTP_CONTENT_TYPE", "text/plain"]], headers
+  end
+
+  def test_setter
+    @headers['foo'] = "bar"
+    assert_equal "bar", @headers['foo']
+  end
+
+  def test_key?
+    assert @headers.key?('HTTP_CONTENT_TYPE')
+    assert @headers.include?('HTTP_CONTENT_TYPE')
+  end
+
+  def test_fetch_with_block
+    assert_equal 'omg', @headers.fetch('notthere') { 'omg' }
+  end
+
   test "content type" do
     assert_equal "text/plain", @headers["Content-Type"]
     assert_equal "text/plain", @headers["content-type"]
     assert_equal "text/plain", @headers["CONTENT_TYPE"]
     assert_equal "text/plain", @headers["HTTP_CONTENT_TYPE"]
   end
+
+  test "fetch" do
+    assert_equal "text/plain", @headers.fetch("content-type", nil)
+    assert_equal "not found", @headers.fetch('not-found', 'not found')
+  end
 end