public void SeekMethodSadPath()
{
var receiver = new KafkaReceiver("name", "one_topic", "groupId", "servers");
Action act = () => receiver.Seek(DateTime.Now);
act.Should().ThrowExactly <InvalidOperationException>()
.WithMessage("Seek cannot be called before the receiver has been started.");
}
public void SeekMethodHappyPath()
{
var assignments = new List <TopicPartition>
{
new TopicPartition("one_topic", new Partition(0)),
new TopicPartition("one_topic", new Partition(1))
};
var offsetsForTimes = new List <TopicPartitionOffset>
{
new TopicPartitionOffset(assignments[0], new Offset(1)),
new TopicPartitionOffset(assignments[1], new Offset(2))
};
TopicPartitionTimestamp[] actualTimestamps = null;
Action <IEnumerable <TopicPartitionTimestamp>, TimeSpan> callback = (timestamps, timeout) =>
actualTimestamps = timestamps.ToArray();
var mockConsumer = new Mock <IConsumer <string, byte[]> >();
mockConsumer.Setup(m => m.Assignment).Returns(assignments);
mockConsumer.Setup(m => m.OffsetsForTimes(It.IsAny <IEnumerable <TopicPartitionTimestamp> >(), It.IsAny <TimeSpan>()))
.Returns(offsetsForTimes)
.Callback(callback);
var lazyConsumer = new Lazy <IConsumer <string, byte[]> >(() => mockConsumer.Object);
var receiver = new KafkaReceiver("name", "one_topic", "groupId", "servers");
receiver.Unlock()._consumer = lazyConsumer;
var timestamp = new DateTime(2020, 9, 3, 17, 52, 37, DateTimeKind.Local).ToUniversalTime();
receiver.Seek(timestamp);
mockConsumer.Verify(m => m.Seek(offsetsForTimes[0]), Times.Once());
mockConsumer.Verify(m => m.Seek(offsetsForTimes[1]), Times.Once());
var expectedTimestampsToSearch = assignments.Select(tp => new TopicPartitionTimestamp(tp, new Timestamp(timestamp))).ToArray();
mockConsumer.Verify(m => m.OffsetsForTimes(expectedTimestampsToSearch, It.IsAny <TimeSpan>()), Times.Once());
actualTimestamps.Should().HaveCount(2);
actualTimestamps.Select(t => t.TopicPartition).Should().BeEquivalentTo(assignments);
actualTimestamps.Select(t => t.Timestamp.UtcDateTime).Should().AllBeEquivalentTo(timestamp);
}