/// <summary>
/// Compares two object trees.
/// </summary>
private void _CompareObjectTree(object firstTree, object secondTree)
{
TreeCompareResult result = TreeComparer.CompareLogical(firstTree, secondTree);
if (CompareResult.Different == result.Result)
{
throw new Exception("Failure occurred while comparing object trees.");
}
}
/// <summary>
/// 1. Take existing xaml test data
/// 2. Generate WPF object using XamlReader.Load
/// 3. Use XamlWriter.Save to serialize the Object into Xaml
/// 4. Verify this generated Xaml matched the expected xaml provided to the test
/// 5. Use XamlReader.Load to generate a WPF Object using the serialized XAML
/// 6. Verify that this new object is identical to object created with the original XAML
/// </summary>
/// <param name="userCreatedXaml">string containing XAML that has to be RoundTripped</param>
/// <param name="preSerializedXaml">string containing XAML that we should get if the RoundTrip was successful</param>
/// <returns>True if RoundTrip is successful otherwise False</returns>
public static bool Verify(string userCreatedXaml, string preSerializedXaml)
{
object wpfObject = null;
using (Stream userCreatedXamlStream = CreateMemoryStream(userCreatedXaml))
{
wpfObject = XamlReader.Load(CreateMemoryStream(userCreatedXaml));
if (wpfObject == null)
{
Variation.Current.LogMessage("UNEXPECTED: Unable to create wpfObject using XamlReader.Load");
return(false);
}
Variation.Current.LogMessage("Created wpfObject");
}
string newSerializedXaml = XamlWriter.Save(wpfObject);
Variation.Current.LogMessage("Serialized wpfObject -> newSerializedXaml");
if (!newSerializedXaml.Equals(preSerializedXaml))
{
Variation.Current.LogMessage("UNEXPECTED: newSerializedXaml and test data(preSerializedXaml)do not match");
SaveFileToLogFolder("Serialized.xaml", newSerializedXaml);
return(false);
}
Variation.Current.LogMessage("newSerializedXaml and test data(preSerializedXaml) match");
object roundTrippedWpfObject = XamlReader.Load(CreateMemoryStream(newSerializedXaml));
if (roundTrippedWpfObject == null)
{
Variation.Current.LogMessage("UNEXPECTED: Unable to create Round Tripped wpfObject XamlReader.Load(newSerializedXaml)");
return(false);
}
Variation.Current.LogMessage("Created Round Tripped wpfObject");
TreeCompareResult objectComparisonResult = TreeComparer.CompareLogical(wpfObject, roundTrippedWpfObject);
if (objectComparisonResult.Result == CompareResult.Different)
{
Variation.Current.LogMessage("UNEXPECTED: RoundTripped WPF Object and Original WPF object no not match");
return(false);
}
Variation.Current.LogMessage("RoundTripped WPF Object and Original WPF object match");
return(true);
}