public void GetEnumerator_WhenCalled_ReturnsCorrectly()
{
// arrange
var sut = new CacheableDataReader(actualDataReader);
// act
var actual = sut.GetEnumerator();
// assert
Assert.That(actual, Is.Not.Null); // <- only sane thing to check directly?
Assert.That(sut.Cast<IDataRecord>().Count(), Is.EqualTo(1)); // <- implies GetEnumerator, probably brittle
}