public async Task GetRegionByIdAsync_CallingTheRepository_ShouldReturnTheRegion() { // Arrange moqRepository.Setup(x => x.GetRegionByIdAsync(It.IsAny <int>())).ReturnsAsync(expectedRegion); // Act var actualRegion = await service.GetRegionByIdAsync(regionId); // Assert moqRepository.VerifyAll(); Assert.AreEqual(expectedRegion, actualRegion); }