对于我的一些单元测试,我必须调用需要Window作为参数的方法.不幸的是,我不能传递null,因为该方法使用窗口作为参考来更新状态栏,其中我显示实际应用程序中实际加载的内容.
MainWindow window = new MainWindow();
但是,这会导致MainWindow constrcutor的InitializeComponent方法中出现以下错误：
System.Windows.Markup.XamlParseException occurred
Message='Provide value on 'System.Windows.Baml2006.TypeConverterMarkupExtension' threw an exception.' Line number '9' and line position '42'.
Source=PresentationFramework
LineNumber=9
LinePosition=42
StackTrace:
at System.Windows.Markup.XamlReader.RewrapException(Exception e,IXamlLineInfo lineInfo,Uri baseUri)
InnerException: System.IO.IOException
Message=Assembly.GetEntryAssembly() returns null. Set the Application.ResourceAssembly property or use the pack://application:,/assemblyname;component/ Syntax to specify the assembly to load the resource from.
Source=PresentationFramework
StackTrace:
at MS.Internal.AppModel.ResourceContainer.GetResourceManagerWrapper(Uri uri,String& partName,Boolean& isContentFile)
at MS.Internal.AppModel.ResourceContainer.GetPartCore(Uri uri)
at System.IO.Packaging.Package.GetPartHelper(Uri partUri)
at System.IO.Packaging.Package.GetPart(Uri partUri)
at System.IO.Packaging.PackWebResponse.CachedResponse.GetResponseStream()
at System.IO.Packaging.PackWebResponse.GetResponseStream()
at System.IO.Packaging.PackWebResponse.get_ContentType()
at System.Windows.Media.Imaging.BitmapDecoder.SetupDecoderFromUriOrStream(Uri uri,Stream stream,BitmapCacheOption cacheOption,Guid& clsId,Boolean& isOriginalWritable,Stream& uriStream,UnmanagedMemoryStream& unmanagedMemoryStream,SafeFileHandle& safeFilehandle)
at System.Windows.Media.Imaging.BitmapDecoder.CreateFromUriOrStream(Uri baseUri,Uri uri,BitmapCreateOptions createOptions,RequestCachePolicy uriCachePolicy,Boolean insertInDecoderCache)
at System.Windows.Media.Imaging.BitmapFrame.CreateFromUriOrStream(Uri baseUri,RequestCachePolicy uriCachePolicy)
at System.Windows.Media.ImageSourceConverter.ConvertFrom(ITypeDescriptorContext context,CultureInfo culture,Object value)
at System.Windows.Baml2006.TypeConverterMarkupExtension.ProvideValue(IServiceProvider serviceProvider)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me,IServiceProvider serviceProvider)
InnerException:
所以我的问题是,如何在单元测试中实例化或模拟窗口？
解决方法
尝试以下：
if(Application.ResourceAssembly == null)
Application.ResourceAssembly = typeof(MainWindow).Assembly;
var window = new MainWindow();
