public void produced_checkpoint_tags_are_correctly_ordered()
{
var t = new MultiStreamPositionTagger(new[] {"stream1", "stream2"});
var zero = t.MakeZeroCheckpointTag();
var zeroEvent = t.MakeCheckpointTag(zero, _zeroEvent);
var zeroEvent2 = t.MakeCheckpointTag(zeroEvent, _zeroEvent);
var first = t.MakeCheckpointTag(zeroEvent2, _firstEvent);
var second = t.MakeCheckpointTag(first, _secondEvent);
var second2 = t.MakeCheckpointTag(zeroEvent, _secondEvent);
var third = t.MakeCheckpointTag(second, _thirdEvent);
Assert.IsTrue(zeroEvent > zero);
Assert.IsTrue(first > zero);
Assert.IsTrue(second > first);
Assert.AreEqual(zeroEvent2, zeroEvent);
Assert.AreNotEqual(second, second2);
Assert.IsTrue(second2 > zeroEvent);
Assert.Throws<InvalidOperationException>(() => { var r = second2 > first; });
Assert.IsTrue(third > second);
Assert.IsTrue(third > first);
Assert.IsTrue(third > zeroEvent);
Assert.IsTrue(third > zero);
}
public void zero_position_tag_is_before_first_event_possible()
{
var t = new MultiStreamPositionTagger(new[] {"stream1", "stream2"});
var zero = t.MakeZeroCheckpointTag();
var zeroFromEvent = t.MakeCheckpointTag(zero, _zeroEvent);
Assert.IsTrue(zeroFromEvent > zero);
}