diff --git a/services/screentransport/test/unittest/screendatachannel/src/screen_data_channel_impl_test.cpp b/services/screentransport/test/unittest/screendatachannel/src/screen_data_channel_impl_test.cpp
index 6a9754ce51392aa363933016059cb6451b2f9394..afa7cf0b4028c578092a11d650dd8f1147bba864 100644
--- a/services/screentransport/test/unittest/screendatachannel/src/screen_data_channel_impl_test.cpp
+++ b/services/screentransport/test/unittest/screendatachannel/src/screen_data_channel_impl_test.cpp
@@ -37,6 +37,7 @@ void ScreenDataChannelImplTest::TearDown(void)
     dataChannelImpl_ = nullptr;
 }
 
+
 /**
  * @tc.name: CreateSession_001
  * @tc.desc: Verify the CreateSession function.
@@ -47,7 +48,6 @@ HWTEST_F(ScreenDataChannelImplTest, CreateSession_001, TestSize.Level1)
 {
     std::shared_ptr<IScreenChannelListener> listener = nullptr;
     int32_t ret = dataChannelImpl_->CreateSession(listener);
-
     EXPECT_EQ(ERR_DH_SCREEN_TRANS_NULL_VALUE, ret);
 }
 
@@ -62,10 +62,22 @@ HWTEST_F(ScreenDataChannelImplTest, CreateSession_002, TestSize.Level1)
     std::shared_ptr<IScreenChannelListener> listener = std::make_shared<MockIScreenChannelListener>();
     dataChannelImpl_->jpegSessionFlag_ = false;
     int32_t ret = dataChannelImpl_->CreateSession(listener);
-
     EXPECT_EQ(-1, ret);
 }
 
+/**
+ * @tc.name: ReleaseSession_001
+ * @tc.desc: Verify the CreateSession function.
+ * @tc.type: FUNC
+ * @tc.require: Issue Number
+ */
+HWTEST_F(ScreenDataChannelImplTest, ReleaseSession_001, TestSize.Level1)
+{
+    std::shared_ptr<IScreenChannelListener> listener = std::make_shared<MockIScreenChannelListener>();
+    dataChannelImpl_->SetJpegSessionFlag(true);
+    EXPECT_EQ(ERR_DH_SCREEN_TRANS_ILLEGAL_OPERATION, dataChannelImpl_->ReleaseSession());   
+}
+
 /**
  * @tc.name: OpenSession_001
  * @tc.desc: Verify the OpenSession function.
@@ -75,7 +87,19 @@ HWTEST_F(ScreenDataChannelImplTest, CreateSession_002, TestSize.Level1)
 HWTEST_F(ScreenDataChannelImplTest, OpenSession_001, TestSize.Level1)
 {
     int32_t ret = dataChannelImpl_->OpenSession();
+    EXPECT_EQ(ERR_DH_SCREEN_TRANS_ERROR, ret);
+}
 
+/**
+ * @tc.name: OpenSession_002
+ * @tc.desc: Verify the OpenSession function.
+ * @tc.type: FUNC
+ * @tc.require: Issue Number
+ */
+HWTEST_F(ScreenDataChannelImplTest, OpenSession_002, TestSize.Level1)
+{
+    dataChannelImpl_->SetJpegSessionFlag(true);
+    int32_t ret = dataChannelImpl_->OpenSession();
     EXPECT_EQ(ERR_DH_SCREEN_TRANS_ERROR, ret);
 }
 
@@ -89,7 +113,6 @@ HWTEST_F(ScreenDataChannelImplTest, SendFullData_001, TestSize.Level1)
 {
     std::shared_ptr<DataBuffer> screenData = nullptr;
     int32_t ret = dataChannelImpl_->SendFullData(screenData);
-
     EXPECT_EQ(ERR_DH_SCREEN_TRANS_NULL_VALUE, ret);
 }
 
@@ -104,7 +127,6 @@ HWTEST_F(ScreenDataChannelImplTest, SendFullData_002, TestSize.Level1)
     std::shared_ptr<DataBuffer> data = std::make_shared<DataBuffer>(10);
     dataChannelImpl_->sessionId_ = 1;
     int32_t ret = dataChannelImpl_->SendFullData(data);
-
     EXPECT_EQ(ERR_DH_SCREEN_TRANS_ERROR, ret);
 }
 
@@ -118,7 +140,6 @@ HWTEST_F(ScreenDataChannelImplTest, SendDirtyData_001, TestSize.Level1)
 {
     std::shared_ptr<DataBuffer> screenData = nullptr;
     int32_t ret = dataChannelImpl_->SendDirtyData(screenData);
-
     EXPECT_EQ(ERR_DH_SCREEN_TRANS_NULL_VALUE, ret);
 }
 
@@ -133,7 +154,6 @@ HWTEST_F(ScreenDataChannelImplTest, SendDirtyData_002, TestSize.Level1)
     std::shared_ptr<DataBuffer> data = std::make_shared<DataBuffer>(10);
     dataChannelImpl_->jpegSessionId_ = 1;
     int32_t ret = dataChannelImpl_->SendFullData(data);
-
     EXPECT_EQ(ERR_DH_SCREEN_TRANS_ERROR, ret);
 }
 
@@ -184,6 +204,32 @@ HWTEST_F(ScreenDataChannelImplTest, close_session_test_002, TestSize.Level1)
     EXPECT_EQ(ERR_DH_SCREEN_TRANS_SESSION_NOT_OPEN, dataChannelImpl_->CloseSession());
 }
 
+/**
+ * @tc.name: close_session_test_003
+ * @tc.desc: Verify the CloseSession function.
+ * @tc.type: FUNC
+ * @tc.require: Issue Number
+ */
+HWTEST_F(ScreenDataChannelImplTest, close_session_test_003, TestSize.Level1)
+{
+    dataChannelImpl_->channelListener_ = std::make_shared<MockIScreenChannelListener>();
+
+    StreamData ext = {0};
+    StreamFrameInfo *param = nullptr;
+
+    int32_t sessionId = 0;
+    StreamData data;
+    data.buf = new char[DATA_LEN];
+    data.bufLen = DATA_LEN;
+
+    auto dataBuffer = std::make_shared<DataBuffer>(10);
+    dataChannelImpl_->ProcessDirtyData(&data, dataBuffer, &ext);
+    dataChannelImpl_->OnStreamReceived(sessionId, &data, &ext, param);
+    delete[] data.buf;
+    dataChannelImpl_->sessionId_ = 0;
+    EXPECT_EQ(ERR_DH_SCREEN_TRANS_SESSION_NOT_OPEN, dataChannelImpl_->CloseSession());
+}
+
 /**
  * @tc.name: send_data_test_001
  * @tc.desc: Verify the SendData function.
@@ -237,6 +283,45 @@ HWTEST_F(ScreenDataChannelImplTest, send_data_test_003, TestSize.Level1)
     EXPECT_EQ(ERR_DH_SCREEN_TRANS_ERROR, dataChannelImpl_->SendData(data));
 }
 
+/**
+ * @tc.name: send_data_test_004
+ * @tc.desc: Verify the SendData function.
+ * @tc.type: FUNC
+ * @tc.require: Issue Number
+ */
+HWTEST_F(ScreenDataChannelImplTest, send_data_test_004, TestSize.Level1)
+{
+    std::shared_ptr<IScreenChannelListener> listener = nullptr;
+    dataChannelImpl_->channelListener_ = listener;
+    dataChannelImpl_->jpegSessionFlag_ = true;
+    int32_t sessionId = 0;
+    dataChannelImpl_->OnSessionOpened(sessionId, 10);
+    dataChannelImpl_->OnSessionClosed(sessionId);
+    std::shared_ptr<DataBuffer> data = std::make_shared<DataBuffer>(10);
+    data->SetDataType(VIDEO_FULL_SCREEN_DATA);
+    EXPECT_EQ(ERR_DH_SCREEN_TRANS_ERROR, dataChannelImpl_->SendData(data));
+}
+
+/**
+ * @tc.name: send_data_test_005
+ * @tc.desc: Verify the SendData function.
+ * @tc.type: FUNC
+ * @tc.require: Issue Number
+ */
+HWTEST_F(ScreenDataChannelImplTest, send_data_test_005, TestSize.Level1)
+{
+    std::shared_ptr<IScreenChannelListener> listener = nullptr;
+    dataChannelImpl_->channelListener_ = listener;
+    dataChannelImpl_->jpegSessionFlag_ = true;
+    dataChannelImpl_->sessionId_ = 1;
+    int32_t sessionId = 0;
+    dataChannelImpl_->OnSessionOpened(sessionId, 10);
+    dataChannelImpl_->OnSessionClosed(sessionId);
+    std::shared_ptr<DataBuffer> data = std::make_shared<DataBuffer>(10);
+    data->SetDataType(VIDEO_FULL_SCREEN_DATA);
+    EXPECT_EQ(ERR_DH_SCREEN_TRANS_ERROR, dataChannelImpl_->SendData(data));
+}
+
 /**
  * @tc.name: on_session_opened_test_001
  * @tc.desc: Verify the OnSessionOpened function.