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responses_test.go
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package protocol
import (
"encoding/hex"
"fmt"
"reflect"
"strings"
"testing"
"github.com/google/uuid"
"github.com/grepplabs/kafka-proxy/config"
"github.com/pkg/errors"
"github.com/stretchr/testify/assert"
)
var (
emptyMetadataResponse = []byte{
// brokers
0x00, 0x00, 0x00, 0x00,
// topic_metadata
0x00, 0x00, 0x00, 0x00}
testResponseModifier = func(brokerHost string, brokerPort int32, brokerId int32) (listenerHost string, listenerPort int32, err error) {
if brokerHost == "localhost" && brokerPort == 51 {
return "myhost1", 34001, nil
} else if brokerHost == "google.com" && brokerPort == 273 {
return "myhost2", 34002, nil
} else if brokerHost == "kafka.org" && brokerPort == 53503 {
return "myhost3", 34003, nil
}
return "", 0, errors.New("unexpected data")
}
testResponseModifier2 = func(brokerHost string, brokerPort int32, brokerId int32) (listenerHost string, listenerPort int32, err error) {
if brokerHost == "localhost" && brokerPort == 19092 {
return "myhost1", 34001, nil
} else if brokerHost == "localhost" && brokerPort == 29092 {
return "myhost2", 34002, nil
} else if brokerHost == "localhost" && brokerPort == 39092 {
return "myhost3", 34003, nil
} else if brokerHost == "localhost" && brokerPort == 9999 {
return "myhost", 34000, nil
} else if brokerHost == "localhost" && brokerPort == 9092 {
return "myhost5", 34005, nil
}
return "", 0, errors.New("unexpected data")
}
)
func TestDecodeEmptyMetadataResponseV0(t *testing.T) {
a := assert.New(t)
schema := metadataResponseSchemaVersions[0]
bytes := emptyMetadataResponse
s, err := DecodeSchema(bytes, schema)
a.Nil(err)
a.Equal(`metadata_response_v0{brokers:[],topic_metadata:[]}`, s.String())
a.Len(s.Values, 2)
brokers, ok := s.Get("brokers").([]interface{})
a.True(ok)
a.Len(brokers, 0)
topicMetadata, ok := s.Get("topic_metadata").([]interface{})
a.True(ok)
a.Len(topicMetadata, 0)
resp, err := EncodeSchema(s, schema)
a.Nil(err)
a.Equal(bytes, resp)
}
func TestMetadataResponseV0WithBrokers(t *testing.T) {
// The Hard Way
bytes := []byte{
// brokers
0x00, 0x00, 0x00, 0x02,
// brokers[0]
0x00, 0x00, 0xab, 0xff, // 44031
0x00, 0x09, 'l', 'o', 'c', 'a', 'l', 'h', 'o', 's', 't',
0x00, 0x00, 0x00, 0x33, // 51
// brokers[1]
0x00, 0x01, 0x02, 0x03, // 66051
0x00, 0x0a, 'g', 'o', 'o', 'g', 'l', 'e', '.', 'c', 'o', 'm',
0x00, 0x00, 0x01, 0x11, // 273
// topic_metadata
0x00, 0x00, 0x00, 0x00}
a := assert.New(t)
schema := metadataResponseSchemaVersions[0]
s, err := DecodeSchema(bytes, schema)
a.Nil(err)
a.Equal(`metadata_response_v0{brokers:[metadata_broker_v0{node_id:44031,host:localhost,port:51} metadata_broker_v0{node_id:66051,host:google.com,port:273}],topic_metadata:[]}`, s.String())
a.Len(s.Values, 2)
brokers, ok := s.Get("brokers").([]interface{})
a.True(ok)
a.Len(brokers, 2)
// broker[0]
brokerStruct, ok := brokers[0].(*Struct)
a.True(ok)
a.Len(brokerStruct.Values, 3)
nodeId, ok := brokerStruct.Get("node_id").(int32)
a.True(ok)
a.Equal(int32(0xabff), nodeId)
host, ok := brokerStruct.Get("host").(string)
a.True(ok)
a.Equal("localhost", host)
port, ok := brokerStruct.Get("port").(int32)
a.True(ok)
a.Equal(int32(0x33), port)
// broker[1]
brokerStruct, ok = brokers[1].(*Struct)
a.True(ok)
a.Len(brokerStruct.Values, 3)
nodeId, ok = brokerStruct.Get("node_id").(int32)
a.True(ok)
a.Equal(int32(0x00010203), nodeId)
host, ok = brokerStruct.Get("host").(string)
a.True(ok)
a.Equal("google.com", host)
port, ok = brokerStruct.Get("port").(int32)
a.True(ok)
a.Equal(int32(0x0111), port)
topicMetadata, ok := s.Get("topic_metadata").([]interface{})
a.True(ok)
a.Len(topicMetadata, 0)
resp, err := EncodeSchema(s, schema)
a.Nil(err)
a.Equal(bytes, resp)
}
func TestMetadataResponseV0WithTopics(t *testing.T) {
// The Hard Way
bytes := []byte{
// brokers
0x00, 0x00, 0x00, 0x00,
// topic_metadata
0x00, 0x00, 0x00, 0x02,
// topic_metadata[0]
0x00, 0x00,
0x00, 0x03, 'f', 'o', 'o',
// partition_metadata
0x00, 0x00, 0x00, 0x01,
0x00, 0x04,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x07,
0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x00,
// topic_metadata[1]
0x00, 0x00,
0x00, 0x03, 'b', 'a', 'r',
// partition_metadata
0x00, 0x00, 0x00, 0x00}
a := assert.New(t)
schema := metadataResponseSchemaVersions[0]
s, err := DecodeSchema(bytes, schema)
a.Nil(err)
a.Equal(`metadata_response_v0{brokers:[],topic_metadata:[topic_metadata_v0{error_code:0,topic:foo,partition_metadata:[partition_metadata_v0{error_code:4,partition:1,leader:7,replicas:[1 2 3],isr:[]}]} topic_metadata_v0{error_code:0,topic:bar,partition_metadata:[]}]}`, s.String())
a.Len(s.Values, 2)
brokers, ok := s.Get("brokers").([]interface{})
a.True(ok)
a.Len(brokers, 0)
topicMetadata, ok := s.Get("topic_metadata").([]interface{})
a.True(ok)
a.Len(topicMetadata, 2)
// topic_metadata[0]
topicMetadataStruct, ok := topicMetadata[0].(*Struct)
a.True(ok)
a.Len(topicMetadataStruct.Values, 3)
errorCode, ok := topicMetadataStruct.Get("error_code").(int16)
a.True(ok)
a.Equal(int16(0), errorCode)
topic, ok := topicMetadataStruct.Get("topic").(string)
a.True(ok)
a.Equal("foo", topic)
partitionMetadata, ok := topicMetadataStruct.Get("partition_metadata").([]interface{})
a.True(ok)
a.Len(partitionMetadata, 1)
// partitionMetadata[0]
partitionMetadataStruct, ok := partitionMetadata[0].(*Struct)
a.True(ok)
a.Len(partitionMetadataStruct.Values, 5)
errorCode, ok = partitionMetadataStruct.Get("error_code").(int16)
a.True(ok)
a.Equal(int16(4), errorCode)
partition, ok := partitionMetadataStruct.Get("partition").(int32)
a.True(ok)
a.Equal(int32(1), partition)
leader, ok := partitionMetadataStruct.Get("leader").(int32)
a.True(ok)
a.Equal(int32(7), leader)
replicas, ok := partitionMetadataStruct.Get("replicas").([]interface{})
a.True(ok)
a.Len(replicas, 3)
a.Equal(int32(1), replicas[0])
a.Equal(int32(2), replicas[1])
a.Equal(int32(3), replicas[2])
isr, ok := partitionMetadataStruct.Get("isr").([]interface{})
a.True(ok)
a.Len(isr, 0)
// topic_metadata[1]
topicMetadataStruct, ok = topicMetadata[1].(*Struct)
a.True(ok)
a.Len(topicMetadataStruct.Values, 3)
errorCode, ok = topicMetadataStruct.Get("error_code").(int16)
a.True(ok)
a.Equal(int16(0), errorCode)
topic, ok = topicMetadataStruct.Get("topic").(string)
a.True(ok)
a.Equal("bar", topic)
partitionMetadata, ok = topicMetadataStruct.Get("partition_metadata").([]interface{})
a.True(ok)
a.Len(partitionMetadata, 0)
resp, err := EncodeSchema(s, schema)
a.Nil(err)
a.Equal(bytes, resp)
}
func TestEmptyMetadataResponseV0(t *testing.T) {
a := assert.New(t)
schema := metadataResponseSchemaVersions[0]
bytes := emptyMetadataResponse
s, err := DecodeSchema(bytes, schema)
a.Nil(err)
dc := newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected := []string{
"[brokers]",
"[topic_metadata]",
}
a.Equal(expected, dc.AttrValues())
resp, err := EncodeSchema(s, schema)
a.Nil(err)
a.Equal(bytes, resp)
}
func TestMetadataResponseV0(t *testing.T) {
/*
Metadata Response (Version: 0) => [brokers] [topic_metadata]
brokers => node_id host port
node_id => INT32
host => STRING
port => INT32
topic_metadata => error_code topic [partition_metadata]
error_code => INT16
topic => STRING
partition_metadata => error_code partition leader [replicas] [isr]
error_code => INT16
partition => INT32
leader => INT32
replicas => INT32
isr => INT32
*/
apiVersion := int16(0)
bytes := []byte{
// brokers
0x00, 0x00, 0x00, 0x02,
// brokers[0]
0x00, 0x00, 0xab, 0xff, // 44031
0x00, 0x09, 'l', 'o', 'c', 'a', 'l', 'h', 'o', 's', 't',
0x00, 0x00, 0x00, 0x33, // 51
// brokers[1]
0x00, 0x01, 0x02, 0x03, // 66051
0x00, 0x0a, 'g', 'o', 'o', 'g', 'l', 'e', '.', 'c', 'o', 'm',
0x00, 0x00, 0x01, 0x11, // 273
// topic_metadata
0x00, 0x00, 0x00, 0x02,
// topic_metadata[0]
0x00, 0x00,
0x00, 0x03, 'f', 'o', 'o',
// partition_metadata
0x00, 0x00, 0x00, 0x01,
0x00, 0x04,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x07,
0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x00,
// topic_metadata[1]
0x00, 0x00,
0x00, 0x03, 'b', 'a', 'r',
// partition_metadata
0x00, 0x00, 0x00, 0x00}
a := assert.New(t)
schema := metadataResponseSchemaVersions[apiVersion]
s, err := DecodeSchema(bytes, schema)
a.Nil(err)
dc := newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected := []string{
"[brokers]",
"brokers struct",
"node_id int32 44031",
"host string localhost",
"port int32 51",
"brokers struct",
"node_id int32 66051",
"host string google.com",
"port int32 273",
"[topic_metadata]",
"topic_metadata struct",
"error_code int16 0",
"topic string foo",
"[partition_metadata]",
"partition_metadata struct",
"error_code int16 4",
"partition int32 1",
"leader int32 7",
"[replicas]",
"replicas int32 1",
"replicas int32 2",
"replicas int32 3",
"[isr]",
"topic_metadata struct",
"error_code int16 0",
"topic string bar",
"[partition_metadata]",
}
a.Equal(expected, dc.AttrValues())
resp, err := EncodeSchema(s, schema)
a.Nil(err)
a.Equal(bytes, resp)
modifier, err := GetResponseModifier(apiKeyMetadata, apiVersion, func(brokerHost string, brokerPort int32, brokerId int32) (listenerHost string, listenerPort int32, err error) {
if brokerHost == "localhost" && brokerPort == 51 {
return "azure.microsoft.com", 34001, nil
} else if brokerHost == "google.com" && brokerPort == 273 {
return "aws.com", 34999, nil
}
return "", 0, errors.New("unexpected data")
})
a.Nil(err)
resp, err = modifier.Apply(resp)
a.Nil(err)
s, err = DecodeSchema(resp, schema)
a.Nil(err)
dc = newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected = []string{
"[brokers]",
"brokers struct",
"node_id int32 44031",
"host string azure.microsoft.com", // replaced
"port int32 34001", // replaced
"brokers struct",
"node_id int32 66051",
"host string aws.com", // replaced
"port int32 34999", // replaced
"[topic_metadata]",
"topic_metadata struct",
"error_code int16 0",
"topic string foo",
"[partition_metadata]",
"partition_metadata struct",
"error_code int16 4",
"partition int32 1",
"leader int32 7",
"[replicas]",
"replicas int32 1",
"replicas int32 2",
"replicas int32 3",
"[isr]",
"topic_metadata struct",
"error_code int16 0",
"topic string bar",
"[partition_metadata]",
}
a.Equal(expected, dc.AttrValues())
}
func TestMetadataResponseV1(t *testing.T) {
/*
Metadata Response (Version: 1) => [brokers] controller_id [topic_metadata]
brokers => node_id host port rack
node_id => INT32
host => STRING
port => INT32
rack => NULLABLE_STRING
controller_id => INT32
topic_metadata => error_code topic is_internal [partition_metadata]
error_code => INT16
topic => STRING
is_internal => BOOLEAN
partition_metadata => error_code partition leader [replicas] [isr]
error_code => INT16
partition => INT32
leader => INT32
replicas => INT32
isr => INT32
*/
apiVersion := int16(1)
bytes := []byte{
// brokers
0x00, 0x00, 0x00, 0x03,
// brokers[0]
0x00, 0x00, 0xab, 0xff, // 44031
0x00, 0x09, 'l', 'o', 'c', 'a', 'l', 'h', 'o', 's', 't',
0x00, 0x00, 0x00, 0x33, // 51
0x00, 0x00, // ''
// brokers[1]
0x00, 0x01, 0x02, 0x03, // 66051
0x00, 0x0a, 'g', 'o', 'o', 'g', 'l', 'e', '.', 'c', 'o', 'm',
0x00, 0x00, 0x01, 0x11, // 273
0x00, 0x07, 'e', 'u', 'w', 'e', 's', 't', '1',
// brokers[2]
0x00, 0x00, 0x00, 0x02, // 2
0x00, 0x09, 'k', 'a', 'f', 'k', 'a', '.', 'o', 'r', 'g',
0x00, 0x00, 0xd0, 0xff, // 53503
0xff, 0xff, // -1 is nil'
// controller_id
0x00, 0x00, 0xe1, 0xb2, // 57778
// topic_metadata
0x00, 0x00, 0x00, 0x02,
// topic_metadata[0]
0x00, 0x00,
0x00, 0x03, 'f', 'o', 'o',
0x01, // true
// partition_metadata
0x00, 0x00, 0x00, 0x01,
0x00, 0x04,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x07,
0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x02,
// topic_metadata[1]
0x00, 0x00,
0x00, 0x03, 'b', 'a', 'r',
0x00, // false
// partition_metadata
0x00, 0x00, 0x00, 0x00}
a := assert.New(t)
schema := metadataResponseSchemaVersions[apiVersion]
s, err := DecodeSchema(bytes, schema)
a.Nil(err)
dc := newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected := []string{
"[brokers]",
"brokers struct",
"node_id int32 44031",
"host string localhost",
"port int32 51",
"rack *string ",
"brokers struct",
"node_id int32 66051",
"host string google.com",
"port int32 273",
"rack *string euwest1",
"brokers struct",
"node_id int32 2",
"host string kafka.org",
"port int32 53503",
"rack *string <nil>",
"controller_id int32 57778",
"[topic_metadata]",
"topic_metadata struct",
"error_code int16 0",
"topic string foo",
"is_internal bool true",
"[partition_metadata]",
"partition_metadata struct",
"error_code int16 4",
"partition int32 1",
"leader int32 7",
"[replicas]",
"replicas int32 1",
"replicas int32 2",
"replicas int32 3",
"[isr]",
"isr int32 3",
"isr int32 2",
"topic_metadata struct",
"error_code int16 0",
"topic string bar",
"is_internal bool false",
"[partition_metadata]",
}
a.Equal(expected, dc.AttrValues())
resp, err := EncodeSchema(s, schema)
a.Nil(err)
a.Equal(bytes, resp)
modifier, err := GetResponseModifier(apiKeyMetadata, apiVersion, testResponseModifier)
a.Nil(err)
resp, err = modifier.Apply(resp)
a.Nil(err)
s, err = DecodeSchema(resp, schema)
a.Nil(err)
dc = newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected = []string{
"[brokers]",
"brokers struct",
"node_id int32 44031",
"host string myhost1", // replaced
"port int32 34001", // replaced
"rack *string ",
"brokers struct",
"node_id int32 66051",
"host string myhost2", // replaced
"port int32 34002", // replaced
"rack *string euwest1",
"brokers struct",
"node_id int32 2",
"host string myhost3", // replaced
"port int32 34003", // replaced
"rack *string <nil>",
"controller_id int32 57778",
"[topic_metadata]",
"topic_metadata struct",
"error_code int16 0",
"topic string foo",
"is_internal bool true",
"[partition_metadata]",
"partition_metadata struct",
"error_code int16 4",
"partition int32 1",
"leader int32 7",
"[replicas]",
"replicas int32 1",
"replicas int32 2",
"replicas int32 3",
"[isr]",
"isr int32 3",
"isr int32 2",
"topic_metadata struct",
"error_code int16 0",
"topic string bar",
"is_internal bool false",
"[partition_metadata]",
}
a.Equal(expected, dc.AttrValues())
}
func TestMetadataResponseV2(t *testing.T) {
/*
Metadata Response (Version: 2) => [brokers] cluster_id controller_id [topic_metadata]
brokers => node_id host port rack
node_id => INT32
host => STRING
port => INT32
rack => NULLABLE_STRING
cluster_id => NULLABLE_STRING
controller_id => INT32
topic_metadata => error_code topic is_internal [partition_metadata]
error_code => INT16
topic => STRING
is_internal => BOOLEAN
partition_metadata => error_code partition leader [replicas] [isr]
error_code => INT16
partition => INT32
leader => INT32
replicas => INT32
isr => INT32
*/
apiVersion := int16(2)
bytes := []byte{
// brokers
0x00, 0x00, 0x00, 0x03,
// brokers[0]
0x00, 0x00, 0xab, 0xff, // 44031
0x00, 0x09, 'l', 'o', 'c', 'a', 'l', 'h', 'o', 's', 't',
0x00, 0x00, 0x00, 0x33, // 51
0x00, 0x00, // ''
// brokers[1]
0x00, 0x01, 0x02, 0x03, // 66051
0x00, 0x0a, 'g', 'o', 'o', 'g', 'l', 'e', '.', 'c', 'o', 'm',
0x00, 0x00, 0x01, 0x11, // 273
0x00, 0x07, 'e', 'u', 'w', 'e', 's', 't', '1',
// brokers[2]
0x00, 0x00, 0x00, 0x02, // 2
0x00, 0x09, 'k', 'a', 'f', 'k', 'a', '.', 'o', 'r', 'g',
0x00, 0x00, 0xd0, 0xff, // 53503
0xff, 0xff, // -1 is nil'
// cluster_id
0xff, 0xff, // nil
// controller_id
0x00, 0x00, 0xe1, 0xb2, // 57778
// topic_metadata
0x00, 0x00, 0x00, 0x02,
// topic_metadata[0]
0x00, 0x00,
0x00, 0x03, 'f', 'o', 'o',
0x01, // true
// partition_metadata
0x00, 0x00, 0x00, 0x01,
0x00, 0x04,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x07,
0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x02,
// topic_metadata[1]
0x00, 0x00,
0x00, 0x03, 'b', 'a', 'r',
0x00, // false
// partition_metadata
0x00, 0x00, 0x00, 0x00}
a := assert.New(t)
schema := metadataResponseSchemaVersions[apiVersion]
s, err := DecodeSchema(bytes, schema)
a.Nil(err)
dc := newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected := []string{
"[brokers]",
"brokers struct",
"node_id int32 44031",
"host string localhost",
"port int32 51",
"rack *string ",
"brokers struct",
"node_id int32 66051",
"host string google.com",
"port int32 273",
"rack *string euwest1",
"brokers struct",
"node_id int32 2",
"host string kafka.org",
"port int32 53503",
"rack *string <nil>",
"cluster_id *string <nil>",
"controller_id int32 57778",
"[topic_metadata]",
"topic_metadata struct",
"error_code int16 0",
"topic string foo",
"is_internal bool true",
"[partition_metadata]",
"partition_metadata struct",
"error_code int16 4",
"partition int32 1",
"leader int32 7",
"[replicas]",
"replicas int32 1",
"replicas int32 2",
"replicas int32 3",
"[isr]",
"isr int32 3",
"isr int32 2",
"topic_metadata struct",
"error_code int16 0",
"topic string bar",
"is_internal bool false",
"[partition_metadata]",
}
a.Equal(expected, dc.AttrValues())
resp, err := EncodeSchema(s, schema)
a.Nil(err)
a.Equal(bytes, resp)
modifier, err := GetResponseModifier(apiKeyMetadata, apiVersion, testResponseModifier)
a.Nil(err)
resp, err = modifier.Apply(resp)
a.Nil(err)
s, err = DecodeSchema(resp, schema)
a.Nil(err)
dc = newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected = []string{
"[brokers]",
"brokers struct",
"node_id int32 44031",
"host string myhost1", // replaced
"port int32 34001", // replaced
"rack *string ",
"brokers struct",
"node_id int32 66051",
"host string myhost2", // replaced
"port int32 34002", // replaced
"rack *string euwest1",
"brokers struct",
"node_id int32 2",
"host string myhost3", // replaced
"port int32 34003", // replaced
"rack *string <nil>",
"cluster_id *string <nil>",
"controller_id int32 57778",
"[topic_metadata]",
"topic_metadata struct",
"error_code int16 0",
"topic string foo",
"is_internal bool true",
"[partition_metadata]",
"partition_metadata struct",
"error_code int16 4",
"partition int32 1",
"leader int32 7",
"[replicas]",
"replicas int32 1",
"replicas int32 2",
"replicas int32 3",
"[isr]",
"isr int32 3",
"isr int32 2",
"topic_metadata struct",
"error_code int16 0",
"topic string bar",
"is_internal bool false",
"[partition_metadata]",
}
a.Equal(expected, dc.AttrValues())
}
func TestMetadataResponseV3(t *testing.T) {
/*
Metadata Response (Version: 3) => throttle_time_ms [brokers] cluster_id controller_id [topic_metadata]
throttle_time_ms => INT32
brokers => node_id host port rack
node_id => INT32
host => STRING
port => INT32
rack => NULLABLE_STRING
cluster_id => NULLABLE_STRING
controller_id => INT32
topic_metadata => error_code topic is_internal [partition_metadata]
error_code => INT16
topic => STRING
is_internal => BOOLEAN
partition_metadata => error_code partition leader [replicas] [isr]
error_code => INT16
partition => INT32
leader => INT32
replicas => INT32
isr => INT32
*/
apiVersion := int16(3)
bytes := []byte{
// throttle_time_ms
0x00, 0x00, 0x00, 0x01, // 1
// brokers
0x00, 0x00, 0x00, 0x03,
// brokers[0]
0x00, 0x00, 0xab, 0xff, // 44031
0x00, 0x09, 'l', 'o', 'c', 'a', 'l', 'h', 'o', 's', 't',
0x00, 0x00, 0x00, 0x33, // 51
0x00, 0x00, // ''
// brokers[1]
0x00, 0x01, 0x02, 0x03, // 66051
0x00, 0x0a, 'g', 'o', 'o', 'g', 'l', 'e', '.', 'c', 'o', 'm',
0x00, 0x00, 0x01, 0x11, // 273
0x00, 0x07, 'e', 'u', 'w', 'e', 's', 't', '1',
// brokers[2]
0x00, 0x00, 0x00, 0x02, // 2
0x00, 0x09, 'k', 'a', 'f', 'k', 'a', '.', 'o', 'r', 'g',
0x00, 0x00, 0xd0, 0xff, // 53503
0xff, 0xff, // -1 is nil'
// cluster_id
0x00, 0x07, 'm', 'y', 'k', 'a', 'f', 'k', 'a',
// controller_id
0x00, 0x00, 0xe1, 0xb2, // 57778
// topic_metadata
0x00, 0x00, 0x00, 0x02,
// topic_metadata[0]
0x00, 0x00,
0x00, 0x03, 'f', 'o', 'o',
0x01, // true
// partition_metadata
0x00, 0x00, 0x00, 0x01,
0x00, 0x04,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x07,
0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x02,
// topic_metadata[1]
0x00, 0x00,
0x00, 0x03, 'b', 'a', 'r',
0x00, // false
// partition_metadata
0x00, 0x00, 0x00, 0x00}
a := assert.New(t)
schema := metadataResponseSchemaVersions[apiVersion]
s, err := DecodeSchema(bytes, schema)
a.Nil(err)
dc := newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected := []string{
"throttle_time_ms int32 1",
"[brokers]",
"brokers struct",
"node_id int32 44031",
"host string localhost",
"port int32 51",
"rack *string ",
"brokers struct",
"node_id int32 66051",
"host string google.com",
"port int32 273",
"rack *string euwest1",
"brokers struct",
"node_id int32 2",
"host string kafka.org",
"port int32 53503",
"rack *string <nil>",
"cluster_id *string mykafka",
"controller_id int32 57778",
"[topic_metadata]",
"topic_metadata struct",
"error_code int16 0",
"topic string foo",
"is_internal bool true",
"[partition_metadata]",
"partition_metadata struct",
"error_code int16 4",
"partition int32 1",
"leader int32 7",
"[replicas]",
"replicas int32 1",
"replicas int32 2",
"replicas int32 3",
"[isr]",
"isr int32 3",
"isr int32 2",
"topic_metadata struct",
"error_code int16 0",
"topic string bar",
"is_internal bool false",
"[partition_metadata]",
}
a.Equal(expected, dc.AttrValues())
resp, err := EncodeSchema(s, schema)
a.Nil(err)
a.Equal(bytes, resp)
modifier, err := GetResponseModifier(apiKeyMetadata, apiVersion, testResponseModifier)
a.Nil(err)
resp, err = modifier.Apply(resp)
a.Nil(err)
s, err = DecodeSchema(resp, schema)
a.Nil(err)
dc = newDecodeCheck()
err = dc.Traverse(s)
if err != nil {
t.Fatal(err)
}
expected = []string{
"throttle_time_ms int32 1",
"[brokers]",
"brokers struct",
"node_id int32 44031",
"host string myhost1", // replaced
"port int32 34001", // replaced
"rack *string ",
"brokers struct",
"node_id int32 66051",
"host string myhost2", // replaced
"port int32 34002", // replaced
"rack *string euwest1",
"brokers struct",
"node_id int32 2",
"host string myhost3", // replaced
"port int32 34003", // replaced
"rack *string <nil>",
"cluster_id *string mykafka",
"controller_id int32 57778",
"[topic_metadata]",
"topic_metadata struct",
"error_code int16 0",
"topic string foo",
"is_internal bool true",
"[partition_metadata]",
"partition_metadata struct",
"error_code int16 4",
"partition int32 1",
"leader int32 7",
"[replicas]",
"replicas int32 1",
"replicas int32 2",
"replicas int32 3",
"[isr]",
"isr int32 3",
"isr int32 2",
"topic_metadata struct",
"error_code int16 0",
"topic string bar",
"is_internal bool false",
"[partition_metadata]",
}
a.Equal(expected, dc.AttrValues())
}
func TestMetadataResponseV4(t *testing.T) {
// SAME as V3
/*
Metadata Response (Version: 4) => throttle_time_ms [brokers] cluster_id controller_id [topic_metadata]
throttle_time_ms => INT32
brokers => node_id host port rack
node_id => INT32
host => STRING
port => INT32
rack => NULLABLE_STRING