sarama/fetch_response_test.go

package sarama

import (
	"bytes"
	"testing"
)

var (
	emptyFetchResponse = []byte{
		0x00, 0x00, 0x00, 0x00}

	oneMessageFetchResponse = []byte{
		0x00, 0x00, 0x00, 0x01,
		0x00, 0x05, 't', 'o', 'p', 'i', 'c',
		0x00, 0x00, 0x00, 0x01,
		0x00, 0x00, 0x00, 0x05,
		0x00, 0x01,
		0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x10, 0x10,
		0x00, 0x00, 0x00, 0x1C,
		// messageSet
		0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x10,
		// message
		0x23, 0x96, 0x4a, 0xf7, // CRC
		0x00,
		0x00,
		0xFF, 0xFF, 0xFF, 0xFF,
		0x00, 0x00, 0x00, 0x02, 0x00, 0xEE}
)

func TestEmptyFetchResponse(t *testing.T) {
	response := FetchResponse{}
	testDecodable(t, "empty", &response, emptyFetchResponse)

	if len(response.Blocks) != 0 {
		t.Error("Decoding produced topic blocks where there were none.")
	}

}

func TestOneMessageFetchResponse(t *testing.T) {
	response := FetchResponse{}
	testDecodable(t, "one message", &response, oneMessageFetchResponse)

	if len(response.Blocks) == 1 {
		if len(response.Blocks["topic"]) == 1 {
			block := response.GetBlock("topic", 5)
			if block != nil {
				if block.Err != OFFSET_OUT_OF_RANGE {
					t.Error("Decoding didn't produce correct error code.")
				}
				if block.HighWaterMarkOffset != 0x10101010 {
					t.Error("Decoding didn't produce correct high water mark offset.")
				}
				if block.MsgSet.PartialTrailingMessage {
					t.Error("Decoding detected a partial trailing message where there wasn't one.")
				}
				if len(block.MsgSet.Messages) == 1 {
					msgBlock := block.MsgSet.Messages[0]
					if msgBlock.Offset != 0x550000 {
						t.Error("Decoding produced incorrect message offset.")
					}
					msg := msgBlock.Msg
					if msg.Codec != COMPRESSION_NONE {
						t.Error("Decoding produced incorrect message compression.")
					}
					if msg.Key != nil {
						t.Error("Decoding produced message key where there was none.")
					}
					if !bytes.Equal(msg.Value, []byte{0x00, 0xEE}) {
						t.Error("Decoding produced incorrect message value.")
					}
				} else {
					t.Error("Decoding produced incorrect number of messages.")
				}
			} else {
				t.Error("GetBlock didn't return block.")
			}
		} else {
			t.Error("Decoding produced incorrect number of partition blocks for topic.")
		}
	} else {
		t.Error("Decoding produced incorrect number of topic blocks.")
	}
}