public async void GetAllAsync() { // Arrange var expectedVehicles = new Page <Vehicle> { Items = new Vehicle[] { vehicles[0], vehicles[1], vehicles[2] }, TotalSize = 3 }; VehiclesRepositoryMock .Setup(x => x.GetAllAsync()) .ReturnsAsync(vehicles); // Act var result = await ServiceUnderTest.GetAllAsync(pagingOptions); // Assert Assert.True(EqualityHelper.SamePageOfVehicles(expectedVehicles, result)); }