public void GetEnumerator_should_throw_when_called_more_than_once()
{
var mockCursor = new Mock <IAsyncCursor <BsonDocument> >();
var subject = new AsyncCursorEnumerableOneTimeAdapter <BsonDocument>(mockCursor.Object, CancellationToken.None);
subject.GetEnumerator();
Action action = () => subject.GetEnumerator();
action.ShouldThrow <InvalidOperationException>();
}
public void GetEnumerator_should_return_expected_result()
{
var mockCursor = new Mock <IAsyncCursor <BsonDocument> >();
mockCursor.SetupSequence(c => c.MoveNext(CancellationToken.None)).Returns(true).Returns(false);
mockCursor.Setup(c => c.Current).Returns(new[] { new BsonDocument("_id", 0) });
var subject = new AsyncCursorEnumerableOneTimeAdapter <BsonDocument>(mockCursor.Object, CancellationToken.None);
var result = subject.GetEnumerator();
result.MoveNext().Should().BeTrue();
result.Current.Should().Be(new BsonDocument("_id", 0));
result.MoveNext().Should().BeFalse();
}
public void GetEnumerator_should_return_expected_result()
{
var cursor = Substitute.For <IAsyncCursor <BsonDocument> >();
cursor.MoveNext().Returns(true, false);
cursor.Current.Returns(new[] { new BsonDocument("_id", 0) });
var subject = new AsyncCursorEnumerableOneTimeAdapter <BsonDocument>(cursor, CancellationToken.None);
var result = subject.GetEnumerator();
result.MoveNext().Should().BeTrue();
result.Current.Should().Be(new BsonDocument("_id", 0));
result.MoveNext().Should().BeFalse();
}