public async Task UpdateAsync_WhenCalled_ReturnsTrue() { // Arange var result = false; var sensor = Fixture.Create <Sensor>(); MockSensorRepository.Setup(repository => repository.Update(sensor, new CancellationToken(false))) .Returns(() => null); // Act try { await _sensorService.DeleteAsync("1111", CancellationToken.None); } catch (Exception e) { } result = true; // Assert Assert.True(result); }