public void AddCustomHeader_WhenNullHeader_IncludesHeaderInTheMessage()
        {
            // https://github.com/andrewlock/NetEscapades.AspNetCore.SecurityHeaders/issues/35
            var collection = new HeaderPolicyCollection();

            Assert.Throws <ArgumentNullException>(
                "header", () => collection.AddCustomHeader(null, "asdf"));
        }
        public void AddCustomHeader_WhenNullValue_DoesntThrow()
        {
            var collection = new HeaderPolicyCollection();

            collection.AddCustomHeader("header", "value");
        }