public void ShouldCheckpointWrite() { stateManager.Initialize(); var offsets = new Dictionary <TopicPartition, long>(); offsets.AddOrUpdate(new TopicPartition("kv-store-topic", 0), 30); offsets.AddOrUpdate(new TopicPartition("kv-store-topic", 1), 12); stateManager.UpdateChangelogOffsets(offsets); Directory.CreateDirectory(Path.Combine(streamConfigMock.Object.StateDir, streamConfigMock.Object.ApplicationId, "global")); stateManager.Checkpoint(); var lines = File.ReadAllLines(Path.Combine(streamConfigMock.Object.StateDir, streamConfigMock.Object.ApplicationId, "global", ".checkpoint")); Directory.Delete(Path.Combine(streamConfigMock.Object.StateDir), true); Assert.AreEqual(4, lines.Length); Assert.AreEqual("0", lines[0]); Assert.AreEqual("2", lines[1]); Assert.AreEqual("kv-store-topic 0 30", lines[2]); Assert.AreEqual("kv-store-topic 1 12", lines[3]); }