}
			if !testCase.success && err == nil {
				t.Errorf("Expected failed but succeeded")
			}
		})
	}
}

type formValues struct {
	http.Header
}

func newFormValues() formValues {
	return formValues{make(http.Header)}
}

func (f formValues) Set(key, value string) formValues {
	f.Header.Set(key, value)
	return f
}

func (f formValues) Add(key, value string) formValues {