public void CountryExistsTestTrue()
{
//Arrange
var countryId = -1;
var country = new Country();
countryRepositoryMock.Setup(x => x.GetById(countryId))
.Returns(country).Verifiable("should call getById of GenericRepository");
//Act
var isExists = countryService.CountryExists(countryId);
//Assert
Assert.IsTrue(isExists);
unitOfWorkMock.Verify();
countryRepositoryMock.Verify();
}