public void When_AppSettingIsPassed_SetAppSetting_Should_UpdateConfigXml()
{
LoadWebConfigAsXmlDocument();
var expected = new KeyValuePair <string, string>("BP_AppSettings_Key1", "TestValue");
_writer.SetAppSetting(expected.Key, expected.Value);
var actual = _writer.GetAppSetting(expected.Key);
actual.Should().NotBeNullOrEmpty();
expected.Value.Should().BeEquivalentTo(actual);
}