public void Arrange() { _membershipRepository = new Mock <IMembershipRepository>(); _membershipRepository.Setup(x => x.GetCaller(It.IsAny <string>(), It.IsAny <string>())).ReturnsAsync(new MembershipView { AccountId = 12345, Role = Role.Owner }); _validator = new RemovePayeFromAccountCommandValidator(_membershipRepository.Object); }