public void ApplyTo_JsonPatchDocument_PrefixModelState()
{
// Arrange
var operation = new Operation<Customer>("add", "Customer/CustomerId", from: null, value: "TestName");
var patchDoc = new JsonPatchDocument<Customer>();
patchDoc.Operations.Add(operation);
var modelState = new ModelStateDictionary();
// Act
patchDoc.ApplyTo(new Customer(), modelState, "jsonpatch");
// Assert
var error = Assert.Single(modelState["jsonpatch.Customer"].Errors);
Assert.Equal("The property at path 'Customer/CustomerId' could not be added.", error.ErrorMessage);
}