working for in memory single log buffer

weed/util/log_buffer/log_buffer_test.go

@@ -0,0 +1,41 @@
+package log_buffer
+
+import (
+	"math/rand"
+	"testing"
+	"time"
+
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+)
+
+func TestNewLogBuffer(t *testing.T) {
+	lb := NewLogBuffer(time.Second, func(startTime, stopTime time.Time, buf []byte) {
+
+	}, func() {
+
+	})
+
+	startTime := time.Now()
+
+	messageSize := 1024
+	messageCount := 994
+	var buf = make([]byte, messageSize)
+	for i := 0; i < messageCount; i++ {
+		rand.Read(buf)
+		lb.AddToBuffer(nil, buf)
+	}
+
+	receivedmessageCount := 0
+	lb.LoopProcessLogData(startTime, func() bool {
+		// stop if no more messages
+		return false
+	}, func(logEntry *filer_pb.LogEntry) error {
+		receivedmessageCount++
+		return nil
+	})
+
+	if receivedmessageCount != messageCount {
+		t.Errorf("sent %d received %d", messageCount, receivedmessageCount)
+	}
+
+}