public async Task PutAsync_ServiceExists_ReturnsNoContent()
        {
            // Arrange
            _service.Setup(s => s.UpdateAsync(It.IsAny <int>(), It.IsAny <Service>())).ReturnsAsync(true);

            // Act
            var result = await _controller.PutAsync(It.IsAny <int>(), It.IsAny <ServiceUpdateDto>());

            // Assert
            Assert.IsType <NoContentResult>(result);
        }