public void GetTopics()
{
// Arrange
var topicName = "Publishing.TopicTests.GetTopics";
_publisher.AddOrUpdateTopic(new Topic { Name = Guid.NewGuid().ToString() });
_publisher.AddOrUpdateTopic(new Topic { Name = topicName + "1" });
_publisher.AddOrUpdateTopic(new Topic { Name = topicName + "2" });
_publisher.AddOrUpdateTopic(new Topic { Name = topicName + "3" });
// Act
var topics = _publisher.GetTopics();
// Assert
Assert.NotNull(topics);
Assert.True(topics.Count() >= 4); // Maybe more, which were added by other tests
Assert.True(topics.Any((t) => t.Name == topicName + "1"));
Assert.True(topics.Any((t) => t.Name == topicName + "2"));
Assert.True(topics.Any((t) => t.Name == topicName + "3"));
// Act
topics = _publisher.GetTopics(topicName);
Assert.NotNull(topics);
Assert.True(topics.Count() == 3);
Assert.True(topics.Any((t) => t.Name == topicName + "1"));
Assert.True(topics.Any((t) => t.Name == topicName + "2"));
Assert.True(topics.Any((t) => t.Name == topicName + "3"));
}