public void GetClassNameShouldReturnTypeArgumentName()
{
var expected = TypeDescriptor.GetClassName( typeof( object ) );
var target = new CustomTypeDescriptor<object>();
var actual = target.GetClassName();
Assert.Equal( expected, actual );
}
public ComponentImporter(Type type, ICustomTypeDescriptor typeDescriptor) :
base(type)
{
if (typeDescriptor == null)
typeDescriptor = new CustomTypeDescriptor(type);
_properties = typeDescriptor.GetProperties();
}
public void GetPropertyOwnerShouldReturnExpectedValue()
{
var parent = TypeDescriptor.GetProvider( typeof( string ) ).GetTypeDescriptor( typeof( string ) );
var target = new CustomTypeDescriptor<string>( parent );
var property = target.GetProperties().Cast<PropertyDescriptor>().First();
var owner = target.GetPropertyOwner( property );
Assert.Equal( target, owner );
}
public void AddExtensionPropertyShouldNotAllowNullAccessor()
{
var target = new CustomTypeDescriptor<object>();
var ex = Assert.Throws<ArgumentNullException>( () => target.AddExtensionProperty( "Name", (Func<object,string>) null ) );
Assert.Equal( "accessor", ex.ParamName );
ex = Assert.Throws<ArgumentNullException>( () => target.AddExtensionProperty( "Name", (Func<object, string>) null, ObjectExtensions.SetName ) );
Assert.Equal( "accessor", ex.ParamName );
}
public void GetPropertiesShouldIncludeExtensionProperties()
{
var parent = TypeDescriptor.GetProvider( typeof( string ) ).GetTypeDescriptor( typeof( string ) );
var target = new CustomTypeDescriptor<string>( parent );
target.AddExtensionProperty( "Name", ObjectExtensions.GetName );
var properties = target.GetProperties();
Assert.Equal( 2, properties.Count );
Assert.Equal( "Name", properties[1].Name );
}
public void AddExtensionPropertyShouldNotAllowNullOrEmptyPropertyName()
{
var target = new CustomTypeDescriptor<object>();
var ex = Assert.Throws<ArgumentNullException>( () => target.AddExtensionProperty( null, ObjectExtensions.GetName ) );
Assert.Equal( "propertyName", ex.ParamName );
ex = Assert.Throws<ArgumentNullException>( () => target.AddExtensionProperty( "", ObjectExtensions.GetName ) );
Assert.Equal( "propertyName", ex.ParamName );
ex = Assert.Throws<ArgumentNullException>( () => target.AddExtensionProperty( null, ObjectExtensions.GetName, ObjectExtensions.SetName ) );
Assert.Equal( "propertyName", ex.ParamName );
ex = Assert.Throws<ArgumentNullException>( () => target.AddExtensionProperty( "", ObjectExtensions.GetName, ObjectExtensions.SetName ) );
Assert.Equal( "propertyName", ex.ParamName );
}
/// <summary>This method returns the object that should be used during invocation of members.</summary>
/// <returns>The <see cref="T:System.Object" /> that should be used during invocation of members.</returns>
/// <param name="type">The <see cref="T:System.Type" /> of the invocation target.</param>
/// <param name="instance">The potential invocation target.</param>
protected override object GetInvocationTarget(Type type, object instance)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
if (instance == null)
{
throw new ArgumentNullException("instance");
}
if (instance is CustomTypeDescriptor)
{
CustomTypeDescriptor customTypeDescriptor = (CustomTypeDescriptor)instance;
return(customTypeDescriptor.GetPropertyOwner(this));
}
return(base.GetInvocationTarget(type, instance));
}
public void GetTypeDescriptorShouldReturnExpectedValue()
{
// arrange
Func<ICustomTypeDescriptor, ICustomTypeDescriptor> factory = parent =>
{
var descriptor = new CustomTypeDescriptor<string>( parent );
descriptor.AddExtensionProperty( "Name", s => s.GetType().Name );
return descriptor;
};
var target = new TypeDescriptionProvider<string>( factory );
// act
var actual = target.GetTypeDescriptor( typeof( string ), "" );
// assert
Assert.NotNull( actual );
Assert.IsType( typeof( CustomTypeDescriptor<string> ), actual );
}
public void GetPropertiesWithFilterShouldIncludeExtensionProperties()
{
var target = new CustomTypeDescriptor<string>();
target.AddExtensionProperty( "Name", ObjectExtensions.GetName, ObjectExtensions.SetName );
var properties = target.GetProperties( null );
Assert.Equal( 1, properties.Count );
Assert.Equal( "Name", properties[0].Name );
}
