public void ShouldThrowIfFileDoesntExist()
{
var fileSystem = new Mock<IFileSystem>();
fileSystem.Setup(x => x.ReadAllText(It.IsAny<string>())).Throws<FileNotFoundException>();
var xamlLoader = new XamlLoader(fileSystem.Object);
Assert.Throws<FileNotFoundException>(() => xamlLoader.LoadXaml("RandomFile.xaml"));
}
public void ShouldThrowOnInvalidXaml()
{
var fileSystem = new Mock<IFileSystem>();
fileSystem.Setup(x => x.ReadAllText(It.IsAny<string>())).Returns("<Style />");
var xamlLoader = new XamlLoader(fileSystem.Object);
var exception = Assert.Throws<XamlParseException>(() => xamlLoader.LoadXaml("RandomFile.xaml"));
exception.Message.ShouldContain("Cannot create unknown type 'Style'");
}
public void ShouldThrowIfElementIsNotADependencyObject()
{
var fileSystem = new Mock<IFileSystem>();
fileSystem.Setup(x => x.ReadAllText(It.IsAny<string>()))
.Returns("<Style xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" />");
var xamlLoader = new XamlLoader(fileSystem.Object);
var exception = Assert.Throws<InvalidOperationException>(() => xamlLoader.LoadXaml("RandomFile.xaml"));
exception.Message.ShouldContain("The element has to be a DependencyObject");
}
public void ShouldReturnElementOnValidXaml()
{
var fileSystem = new Mock<IFileSystem>();
fileSystem.Setup(x => x.ReadAllText(It.IsAny<string>()))
.Returns("<UserControl xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" />");
var xamlLoader = new XamlLoader(fileSystem.Object);
DependencyObject result = null;
Assert.DoesNotThrow(() => result = xamlLoader.LoadXaml("RandomFile.xaml"));
result.ShouldNotBeNull();
}
