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kafka_handler_test.go
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kafka_handler_test.go
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package kafka_go
import (
"context"
"fmt"
"github.com/Shopify/sarama"
"sort"
"testing"
"time"
)
func TestConsumeClaim(t *testing.T) {
handler := newConsumerHandler(map[string]TopicHandler{
"test-topic": &testTopicHandler{},
}, map[string]TopicHandler{}, []ConsumerMiddleware{testMiddleware1, testMiddleware2},
[]ConsumerInterceptor{testInterceptor1, testInterceptor2}, true)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
ctx = context.WithValue(ctx, "meta", make(map[string]interface{}))
msgChan := make(chan *sarama.ConsumerMessage)
go func() {
for i := 0; i < 100; i++ {
msgChan <- &sarama.ConsumerMessage{
Key: []byte(fmt.Sprintf("key-%v", i)),
Value: []byte(fmt.Sprintf("value-%v", i)),
Topic: "test-topic",
Partition: 0,
Offset: 0,
}
}
cancel()
}()
err := handler.ConsumeClaim(mockConsumerGroupSession(ctx), mockConsumerGroupClaim(msgChan))
if err != nil {
t.Errorf("unkown error %v", err)
} else {
meta := ctx.Value("meta").(map[string]interface{})
if meta["msg"] == nil {
t.Errorf("Message not received by handler")
} else {
messages := meta["msg"].([]string)
if len(messages) != 100 {
t.Errorf("Few messages missed")
}
expectedKeys := make([]string, 0, 100)
for i := 0; i < 100; i++ {
expectedKeys = append(expectedKeys, fmt.Sprintf("key-%v", i))
}
for i := 0; i < len(expectedKeys); i++ {
if messages[i] != expectedKeys[i] {
t.Errorf("extected message key %v, found event %v", expectedKeys[i], messages[i])
}
}
delete(meta, "msg")
}
expectedEvents := []string{"mw1", "mw2", "before1", "before2", "after2", "after1"}
if len(meta) != len(expectedEvents) {
t.Errorf("%v event count not matched", 6-len(meta))
} else {
events := make([]string, 0)
for k, _ := range meta {
events = append(events, k)
}
sort.Slice(events, func(i, j int) bool {
return meta[events[i]].(int64) < meta[events[j]].(int64)
})
for i := 0; i < len(expectedEvents); i++ {
if events[i] != expectedEvents[i] {
t.Errorf("extected event %v, found event %v", expectedEvents[i], events[i])
}
}
}
}
}