diff --git a/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/LogDataTestCase.java b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/LogDataTestCase.java
new file mode 100644
index 000000000..63bd6ee89
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/LogDataTestCase.java
@@ -0,0 +1,29 @@
+package com.a.eye.skywalking.collector.worker.segment.entity;
+
+import com.google.gson.stream.JsonReader;
+import java.io.IOException;
+import java.io.StringReader;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author pengys5
+ */
+public class LogDataTestCase {
+
+    @Test
+    public void deserialize() throws IOException {
+        LogData logData = new LogData();
+
+        JsonReader reader = new JsonReader(new StringReader("{\"tm\":1, \"fi\": {\"test1\":\"test1\",\"test2\":\"test2\"}, \"skip\":\"skip\"}"));
+        logData.deserialize(reader);
+
+        Assert.assertEquals(1L, logData.getTime());
+
+        Map<String, String> fields = logData.getFields();
+        Assert.assertEquals("test1", fields.get("test1"));
+        Assert.assertEquals("test2", fields.get("test2"));
+        Assert.assertEquals(false, fields.containsKey("skip"));
+    }
+}
diff --git a/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/SpanViewTestCase.java b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/SpanViewTestCase.java
new file mode 100644
index 000000000..b98186c88
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/SpanViewTestCase.java
@@ -0,0 +1,37 @@
+package com.a.eye.skywalking.collector.worker.segment.entity;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author pengys5
+ */
+public class SpanViewTestCase {
+
+    @Test
+    public void test() {
+        SpanView spanView = new SpanView();
+        spanView.setSpanId(1);
+        Assert.assertEquals(1, spanView.getSpanId());
+
+        spanView.setSegId("1");
+        Assert.assertEquals("1", spanView.getSegId());
+
+        spanView.setAppCode("2");
+        Assert.assertEquals("2", spanView.getAppCode());
+
+        spanView.setRelativeStartTime(10L);
+        Assert.assertEquals(10L, spanView.getRelativeStartTime());
+
+        spanView.setCost(20L);
+        Assert.assertEquals(20L, spanView.getCost());
+
+        spanView.setOperationName("3");
+        Assert.assertEquals("3", spanView.getOperationName());
+
+        SpanView child = new SpanView();
+        spanView.addChild(child);
+
+        spanView.compareTo(child);
+    }
+}
diff --git a/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/TraceSegmentRefTestCase.java b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/TraceSegmentRefTestCase.java
new file mode 100644
index 000000000..6bb6a0ee3
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/TraceSegmentRefTestCase.java
@@ -0,0 +1,25 @@
+package com.a.eye.skywalking.collector.worker.segment.entity;
+
+import com.google.gson.stream.JsonReader;
+import java.io.IOException;
+import java.io.StringReader;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author pengys5
+ */
+public class TraceSegmentRefTestCase {
+
+    @Test
+    public void deserialize() throws IOException {
+        TraceSegmentRef traceSegmentRef = new TraceSegmentRef();
+        JsonReader reader = new JsonReader(new StringReader("{\"ts\" :\"ts\",\"si\":0,\"ac\":\"ac\",\"ph\":\"ph\", \"skip\":\"skip\"}"));
+        traceSegmentRef.deserialize(reader);
+
+        Assert.assertEquals("ts", traceSegmentRef.getTraceSegmentId());
+        Assert.assertEquals("ac", traceSegmentRef.getApplicationCode());
+        Assert.assertEquals("ph", traceSegmentRef.getPeerHost());
+        Assert.assertEquals(0, traceSegmentRef.getSpanId());
+    }
+}
diff --git a/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/BooleanTagTestCase.java b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/BooleanTagTestCase.java
new file mode 100644
index 000000000..41ca79805
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/BooleanTagTestCase.java
@@ -0,0 +1,31 @@
+package com.a.eye.skywalking.collector.worker.segment.entity.tag;
+
+import com.a.eye.skywalking.collector.worker.segment.entity.Span;
+import java.lang.reflect.Field;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author pengys5
+ */
+public class BooleanTagTestCase {
+
+    @Test
+    public void test() throws NoSuchFieldException, IllegalAccessException {
+        BooleanTag booleanTag = new BooleanTag("test", false);
+
+        Map<String, Boolean> tagsWithInt = new LinkedHashMap<>();
+
+        Span span = new Span();
+        Field testAField = span.getClass().getDeclaredField("tagsWithBool");
+        testAField.setAccessible(true);
+        testAField.set(span, tagsWithInt);
+
+        Assert.assertEquals(false, booleanTag.get(span));
+
+        tagsWithInt.put("test", true);
+        Assert.assertEquals(true, booleanTag.get(span));
+    }
+}
diff --git a/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/IntTagTestCase.java b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/IntTagTestCase.java
new file mode 100644
index 000000000..8d739bf03
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/IntTagTestCase.java
@@ -0,0 +1,31 @@
+package com.a.eye.skywalking.collector.worker.segment.entity.tag;
+
+import com.a.eye.skywalking.collector.worker.segment.entity.Span;
+import java.lang.reflect.Field;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author pengys5
+ */
+public class IntTagTestCase {
+
+    @Test
+    public void test() throws NoSuchFieldException, IllegalAccessException {
+        IntTag intTag = new IntTag("test");
+
+        Map<String, Integer> tagsWithInt = new LinkedHashMap<>();
+
+        Span span = new Span();
+        Field testAField = span.getClass().getDeclaredField("tagsWithInt");
+        testAField.setAccessible(true);
+        testAField.set(span, tagsWithInt);
+
+        Assert.assertEquals(null, intTag.get(span));
+
+        tagsWithInt.put("test", 10);
+        Assert.assertEquals(10, intTag.get(span).intValue());
+    }
+}
diff --git a/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/ShortTagTestCase.java b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/ShortTagTestCase.java
new file mode 100644
index 000000000..61cedbc6c
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/ShortTagTestCase.java
@@ -0,0 +1,35 @@
+package com.a.eye.skywalking.collector.worker.segment.entity.tag;
+
+import com.a.eye.skywalking.collector.worker.segment.entity.Span;
+import com.a.eye.skywalking.collector.worker.storage.SegmentData;
+import com.a.eye.skywalking.collector.worker.storage.WindowData;
+import java.lang.reflect.Field;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author pengys5
+ */
+public class ShortTagTestCase {
+
+    @Test
+    public void test() throws NoSuchFieldException, IllegalAccessException {
+        ShortTag shortTag = new ShortTag("short");
+
+        Map<String, Integer> tagsWithInt = new LinkedHashMap<>();
+
+        Span span = new Span();
+        Field testAField = span.getClass().getDeclaredField("tagsWithInt");
+        testAField.setAccessible(true);
+        testAField.set(span, tagsWithInt);
+
+        Short tag = shortTag.get(span);
+        Assert.assertEquals(null, tag);
+
+        tagsWithInt.put("short", 10);
+        tag = shortTag.get(span);
+        Assert.assertEquals(10, tag.intValue());
+    }
+}
diff --git a/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/TagsTestCase.java b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/TagsTestCase.java
new file mode 100644
index 000000000..5dafb8bf3
--- /dev/null
+++ b/skywalking-collector/skywalking-collector-worker/src/test/java/com/a/eye/skywalking/collector/worker/segment/entity/tag/TagsTestCase.java
@@ -0,0 +1,28 @@
+package com.a.eye.skywalking.collector.worker.segment.entity.tag;
+
+import com.a.eye.skywalking.collector.worker.segment.entity.Span;
+import java.lang.reflect.Field;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @author pengys5
+ */
+public class TagsTestCase {
+
+    @Test
+    public void test() throws NoSuchFieldException, IllegalAccessException {
+        Span span = new Span();
+
+        Map<String, String> tagsWithStr = new LinkedHashMap<>();
+        tagsWithStr.put("span.layer", "db");
+
+        Field testAField = span.getClass().getDeclaredField("tagsWithStr");
+        testAField.setAccessible(true);
+        testAField.set(span, tagsWithStr);
+
+        Assert.assertEquals("db", Tags.SPAN_LAYER.get(span));
+    }
+}