public void AddSingleLevelWildcard()
{
// Arrange
ITopicBuilder builder = new TopicBuilder(TopicConsumer.Subscriber);
// Act
builder = builder.AddSingleLevelWildcard();
// Assert
builder.Levels
.Should()
.Be(1, "because the wildcard consist of one level");
builder.IsAppendingAllowed
.Should()
.BeTrue("because a single level wildcard should not block topic appending");
}