Fix/cookie host (#76)

* fix: cookie host

* feat: add test for url utils

* fix: url test

* fix: multi domain cookie if allowed

server/utils/urls_test.go

@@ -0,0 +1,25 @@
+package utils
+
+import "testing"
+
+func TestGetHostName(t *testing.T) {
+	authorizer_url := "http://test.herokuapp.com"
+
+	got := GetHostName(authorizer_url)
+	want := "test.herokuapp.com"
+
+	if got != want {
+		t.Errorf("GetHostName Test failed got %s, wanted %s", got, want)
+	}
+}
+
+func TestGetDomainName(t *testing.T) {
+	authorizer_url := "http://test.herokuapp.com"
+
+	got := GetDomainName(authorizer_url)
+	want := "herokuapp.com"
+
+	if got != want {
+		t.Errorf("GetHostName Test failed got %q, wanted %q", got, want)
+	}
+}