public void FromDbReaderWithOneRecord_CompareResult_ExpectSame()
        {
            _readerStub.Read().Returns(true, false);

            var sut    = new SingleResultCommandInvoker <string>(_serviceCommand);
            var result = sut.Invoke(_serviceManager);

            Assert.AreEqual(_expected, result);
        }
        public void FromEmptyDbReader_ExpectException()
        {
            _readerStub.Read().Returns(false);

            var sut = new SingleResultCommandInvoker <string>(_serviceCommand);

            Assert.Throws <InvalidOperationException>(() =>
            {
                sut.Invoke(_serviceManager);
            });
        }