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 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 );
}
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 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 );
}