public void ResourceModel_IDataErrorInfo_ThisAccessor_ResourceName()
{
//------------Setup for test--------------------------
var instanceID = Guid.NewGuid();
var err1 = new Mock<IErrorInfo>();
err1.Setup(e => e.InstanceID).Returns(instanceID);
var err2 = new Mock<IErrorInfo>();
err2.Setup(e => e.InstanceID).Returns(Guid.NewGuid());
var model = new ResourceModel(new Mock<IEnvironmentModel>().Object, new Mock<IEventAggregator>().Object);
model.AddError(err1.Object);
model.AddError(err2.Object);
//------------Execute Test---------------------------
var errMessage = model["ResourceName"];
//-------------Assert Results------------------------
Assert.IsNotNull(errMessage);
Assert.AreEqual("Please enter a name for this resource", errMessage);
}