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consumer_test.go
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package gogo_kafka
import (
"errors"
"fmt"
"testing"
"github.com/Shopify/sarama"
"github.com/stretchr/testify/suite"
"github.com/devit-tel/gogo-kafka/mocks"
)
type ConsumerTestSuite struct {
suite.Suite
consumer *consumerSarama
consumerGroupClaim *mocks.ConsumerGroupClaim
consumerGroupSession *mocks.ConsumerGroupSession
retryManager *mocks.RetryProcess
}
func (suite *ConsumerTestSuite) SetupTest() {
suite.consumerGroupClaim = &mocks.ConsumerGroupClaim{}
suite.consumerGroupSession = &mocks.ConsumerGroupSession{}
suite.retryManager = &mocks.RetryProcess{}
suite.consumer = &consumerSarama{
retryManager: suite.retryManager,
ready: make(chan bool),
handlers: map[string]WorkerHandler{},
}
}
func TestConsumerSuite(t *testing.T) {
suite.Run(t, new(ConsumerTestSuite))
}
func makeTestChannelConsumer(messages []*sarama.ConsumerMessage) func() <-chan *sarama.ConsumerMessage {
return func() <-chan *sarama.ConsumerMessage {
out := make(chan *sarama.ConsumerMessage)
go func() {
for _, n := range messages {
out <- n
}
close(out)
}()
return out
}
}
func (suite *ConsumerTestSuite) TestConsumerSarama_Success() {
var result string
testFunc := func(key string, data []byte) error {
result = string(data)
return nil
}
// Map topic to handler
suite.consumer.handlers["testTopic"] = testFunc
// Make message data for test
messages := []*sarama.ConsumerMessage{
{Key: []byte("key_1"), Value: []byte("data_1"), Topic: "testTopic"},
{Key: []byte("key_2"), Value: []byte("data_2"), Topic: "testTopic"},
{Key: []byte("key_3"), Value: []byte("data_3"), Topic: "testTopic"},
}
suite.consumerGroupClaim.On("Messages").Once().Return(makeTestChannelConsumer(messages))
suite.retryManager.On("IsMaximumRetry", "key_1").Once().Return(false)
suite.retryManager.On("IsMaximumRetry", "key_2").Once().Return(false)
suite.retryManager.On("IsMaximumRetry", "key_3").Once().Return(false)
suite.consumerGroupSession.On("MarkMessage", messages[0], "").Once()
suite.consumerGroupSession.On("MarkMessage", messages[1], "").Once()
suite.consumerGroupSession.On("MarkMessage", messages[2], "").Once()
err := suite.consumer.ConsumeClaim(suite.consumerGroupSession, suite.consumerGroupClaim)
suite.NoError(err)
suite.Equal("data_3", result)
suite.retryManager.AssertExpectations(suite.T())
suite.consumerGroupClaim.AssertExpectations(suite.T())
suite.consumerGroupSession.AssertExpectations(suite.T())
}
func (suite *ConsumerTestSuite) TestConsumerSarama_CustomRecoveryFunc() {
var resultData, resultTopic, resultKey, resultPanic string
testFunc := func(key string, data []byte) error {
if string(data) == "data_2" {
panic("data_from_panic_handler")
}
return nil
}
panicFunc := func(err interface{}, topic, key string, data []byte) error {
resultData = string(data)
resultTopic = topic
resultKey = key
resultPanic = fmt.Sprintf("%v", err)
return nil
}
// Map topic to handler
suite.consumer.handlers["testTopic"] = testFunc
suite.consumer.panicHandler = panicFunc
// Make message data for test
messages := []*sarama.ConsumerMessage{
{Key: []byte("key_1"), Value: []byte("data_1"), Topic: "testTopic"},
{Key: []byte("key_2"), Value: []byte("data_2"), Topic: "testTopic"},
{Key: []byte("key_3"), Value: []byte("data_3"), Topic: "testTopic"},
}
suite.consumerGroupClaim.On("Messages").Once().Return(makeTestChannelConsumer(messages))
// Lap: 1
suite.retryManager.On("IsMaximumRetry", "key_1").Once().Return(false)
suite.consumerGroupSession.On("MarkMessage", messages[0], "").Once()
// Lap: 2
suite.retryManager.On("IsMaximumRetry", "key_2").Once().Return(false)
suite.retryManager.On("AddRetryCount", "key_2").Once().Return(3)
suite.retryManager.On("IsMaximumRetry", "key_2").Once().Return(true)
err := suite.consumer.ConsumeClaim(suite.consumerGroupSession, suite.consumerGroupClaim)
suite.NoError(err)
suite.Equal("data_2", resultData)
suite.Equal("testTopic", resultTopic)
suite.Equal("key_2", resultKey)
suite.Equal("data_from_panic_handler", resultPanic)
suite.retryManager.AssertExpectations(suite.T())
suite.consumerGroupClaim.AssertExpectations(suite.T())
suite.consumerGroupSession.AssertExpectations(suite.T())
}
func (suite *ConsumerTestSuite) TestConsumerSarama_ProcessError() {
var retryCounter int
testFunc := func(key string, data []byte) error {
if string(data) == "data_1" && retryCounter == 0 {
retryCounter += 1
return errors.New("test_error")
}
return nil
}
// Map topic to handler
suite.consumer.handlers["testTopic"] = testFunc
// Make message data for test
messages := []*sarama.ConsumerMessage{
{Key: []byte("key_1"), Value: []byte("data_1"), Topic: "testTopic"},
{Key: []byte("key_2"), Value: []byte("data_2"), Topic: "testTopic"},
{Key: []byte("key_3"), Value: []byte("data_3"), Topic: "testTopic"},
}
suite.consumerGroupClaim.On("Messages").Once().Return(makeTestChannelConsumer(messages))
suite.retryManager.On("IsMaximumRetry", "key_1").Once().Return(false)
suite.retryManager.On("AddRetryCount", "key_1").Once().Return(1)
suite.retryManager.On("IsMaximumRetry", "key_1").Once().Return(false)
suite.retryManager.On("DelayProcessFollowBackOffTime", "key_1").Once()
err := suite.consumer.ConsumeClaim(suite.consumerGroupSession, suite.consumerGroupClaim)
suite.Equal(errors.New("test_error"), err)
suite.retryManager.AssertExpectations(suite.T())
suite.consumerGroupClaim.AssertExpectations(suite.T())
suite.consumerGroupSession.AssertExpectations(suite.T())
}
func (suite *ConsumerTestSuite) TestConsumerSarama_MaximumRetryAndSkip() {
var retryCounter int
testFunc := func(key string, data []byte) error {
if string(data) == "data_1" && retryCounter == 0 {
retryCounter += 1
return errors.New("test_error")
}
return nil
}
// Map topic to handler
suite.consumer.handlers["testTopic"] = testFunc
// Make message data for test
messages := []*sarama.ConsumerMessage{
{Key: []byte("key_1"), Value: []byte("data_1"), Topic: "testTopic"},
{Key: []byte("key_2"), Value: []byte("data_2"), Topic: "testTopic"},
{Key: []byte("key_3"), Value: []byte("data_3"), Topic: "testTopic"},
}
suite.consumerGroupClaim.On("Messages").Once().Return(makeTestChannelConsumer(messages))
suite.retryManager.On("IsMaximumRetry", "key_1").Once().Return(true)
suite.retryManager.On("IsMaximumRetry", "key_2").Once().Return(false)
suite.retryManager.On("IsMaximumRetry", "key_3").Once().Return(false)
suite.retryManager.On("ClearRetryCount", "key_1").Once()
suite.consumerGroupSession.On("MarkMessage", messages[0], "").Once()
suite.consumerGroupSession.On("MarkMessage", messages[1], "").Once()
suite.consumerGroupSession.On("MarkMessage", messages[2], "").Once()
err := suite.consumer.ConsumeClaim(suite.consumerGroupSession, suite.consumerGroupClaim)
suite.NoError(err)
suite.retryManager.AssertExpectations(suite.T())
suite.consumerGroupClaim.AssertExpectations(suite.T())
suite.consumerGroupSession.AssertExpectations(suite.T())
}