Test.cs

[Fact]
public async Task TestWithInterface()
{
    var utcNow = new DateTimeOffset(new DateTime(2022, 11, 28));
    _mockSystemDateTime.Setup(x => x.UtcNow()).Returns(utcNow);

    var obj = new OrderServiceWithInterface(_mockBasketRepo.Object, _mockCatalogRepo.Object, _mockOrderRepo.Object, _mockUriComposer.Object, _mockSystemDateTime.Object);

    var address = new Address("120 Freidrich Lane", "Austin", "TX", "US", "78744");
    var order = await obj.CreateOrderAsync(_basketId, address);

    Assert.Equal(utcNow, order.OrderDate);
}