diff --git a/services/tunnelbroker/test/DeliveryBrokerTest.cpp b/services/tunnelbroker/test/DeliveryBrokerTest.cpp
new file mode 100644
--- /dev/null
+++ b/services/tunnelbroker/test/DeliveryBrokerTest.cpp
@@ -0,0 +1,125 @@
+#include "DeliveryBroker.h"
+#include "Tools.h"
+
+#include <gtest/gtest.h>
+
+#include <ctime>
+#include <string>
+
+using namespace comm::network;
+
+class DeliveryBrokerTest : public testing::Test {};
+
+TEST(DeliveryBrokerTest, TestOperationsOnPushAndPop) {
+  const std::string toDeviceID =
+      "mobile:EMQNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdoYAQRt0S6TLzZWNM6XSvdWqxm";
+  const DeliveryBrokerMessage message{
+      .messageID = "bc0c1aa2-bf09-11ec-9d64-0242ac120002",
+      .deliveryTag = 99,
+      .fromDeviceID =
+          "mobile:"
+          "uTfNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdooLkRt0S6TLzZWNM6XSvdWLop",
+      .payload =
+          "lYlNcO6RR4i9UW3G1DGjdJTRRGbqtPya2aj94ZRjIGZWoHwT5MB9ciAgnQf2VafYb9Tl"
+          "8SZkX37tg4yZ9pOb4lqslY4g4h58OmWjumghVRvrPUZDalUuK8OLs1Qoengpu9wccxAk"
+          "Bti2leDTNeiJDy36NnwS9aCIUc0ozsMvXfX1gWdBdmKbiRG1LvpNd6S7BNGG7Zly5zYj"
+          "xz7s6ZUSDoFfZe3eJWQ15ngYhgMw1TsfbECnMVQTYvY6OyqWPBQi5wiftFcluoxor8G5"
+          "RJ1NEDQq2q2FRfWjNHLhky92C2C7Nnfe4oVzSinfC1319uUkNLpSzI4MvEMi6g5Ukbl7"
+          "iGhpnX7Hp4xpBL3h2IkvGviDRQ98UvW0ugwUuPxm1NOQpjLG5dPoqQ0jrMst0Bl5rgPw"
+          "ajjNGsUWmp9r0ST0wRQXrQcY30PoSoqKSlCEgFMLzHWLrPQ86QFyCICismGSe7iBIqdD"
+          "6d37StvXBzfJoZVU79UeOF2bFvb3DNoArEOe"};
+  DeliveryBroker::getInstance().push(
+      message.messageID,
+      message.deliveryTag,
+      toDeviceID,
+      message.fromDeviceID,
+      message.payload);
+  DeliveryBrokerMessage receivedMessage =
+      DeliveryBroker::getInstance().pop(toDeviceID);
+  EXPECT_EQ(message.messageID == receivedMessage.messageID, true);
+  EXPECT_EQ(message.deliveryTag == receivedMessage.deliveryTag, true);
+  EXPECT_EQ(message.fromDeviceID == receivedMessage.fromDeviceID, true);
+  EXPECT_EQ(message.payload == receivedMessage.payload, true);
+}
+
+TEST(DeliveryBrokerTest, TestOperationsOnPushAndPopGenerated) {
+  const std::string toDeviceID =
+      "mobile:" + tools::generateRandomString(DEVICEID_CHAR_LENGTH);
+  const DeliveryBrokerMessage message{
+      .messageID = tools::generateUUID(),
+      .deliveryTag = std::time(0),
+      .fromDeviceID =
+          "mobile:" + tools::generateRandomString(DEVICEID_CHAR_LENGTH),
+      .payload = tools::generateRandomString(512)};
+  DeliveryBroker::getInstance().push(
+      message.messageID,
+      message.deliveryTag,
+      toDeviceID,
+      message.fromDeviceID,
+      message.payload);
+  DeliveryBrokerMessage receivedMessage =
+      DeliveryBroker::getInstance().pop(toDeviceID);
+  EXPECT_EQ(message.messageID == receivedMessage.messageID, true);
+  EXPECT_EQ(message.deliveryTag == receivedMessage.deliveryTag, true);
+  EXPECT_EQ(message.fromDeviceID == receivedMessage.fromDeviceID, true);
+  EXPECT_EQ(message.payload == receivedMessage.payload, true);
+}
+
+TEST(DeliveryBrokerTest, TestOperationsOnIsEmpty) {
+  const std::string deviceID =
+      "mobile:"
+      "EMQNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdoYAQRt0S6TLzZWNM6XSvdWqxm";
+  EXPECT_EQ(DeliveryBroker::getInstance().isEmpty(deviceID), true);
+  const DeliveryBrokerMessage message{
+      .messageID = "bc0c1aa2-bf09-11ec-9d64-0242ac120002",
+      .deliveryTag = 99,
+      .fromDeviceID =
+          "mobile:"
+          "uTfNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdooLkRt0S6TLzZWNM6XSvdWLop",
+      .payload =
+          "lYlNcO6RR4i9UW3G1DGjdJTRRGbqtPya2aj94ZRjIGZWoHwT5MB9ciAgnQf2VafYb9Tl"
+          "8SZkX37tg4yZ9pOb4lqslY4g4h58OmWjumghVRvrPUZDalUuK8OLs1Qoengpu9wccxAk"
+          "Bti2leDTNeiJDy36NnwS9aCIUc0ozsMvXfX1gWdBdmKbiRG1LvpNd6S7BNGG7Zly5zYj"
+          "xz7s6ZUSDoFfZe3eJWQ15ngYhgMw1TsfbECnMVQTYvY6OyqWPBQi5wiftFcluoxor8G5"
+          "RJ1NEDQq2q2FRfWjNHLhky92C2C7Nnfe4oVzSinfC1319uUkNLpSzI4MvEMi6g5Ukbl7"
+          "iGhpnX7Hp4xpBL3h2IkvGviDRQ98UvW0ugwUuPxm1NOQpjLG5dPoqQ0jrMst0Bl5rgPw"
+          "ajjNGsUWmp9r0ST0wRQXrQcY30PoSoqKSlCEgFMLzHWLrPQ86QFyCICismGSe7iBIqdD"
+          "6d37StvXBzfJoZVU79UeOF2bFvb3DNoArEOe"};
+  DeliveryBroker::getInstance().push(
+      message.messageID,
+      message.deliveryTag,
+      deviceID,
+      message.fromDeviceID,
+      message.payload);
+  EXPECT_EQ(DeliveryBroker::getInstance().isEmpty(deviceID), false);
+}
+
+TEST(DeliveryBrokerTest, TestOperationsOnErase) {
+  const std::string deviceID =
+      "mobile:"
+      "EMQNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdoYAQRt0S6TLzZWNM6XSvdWqxm";
+  const DeliveryBrokerMessage message{
+      .messageID = "bc0c1aa2-bf09-11ec-9d64-0242ac120002",
+      .deliveryTag = 99,
+      .fromDeviceID =
+          "mobile:"
+          "uTfNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdooLkRt0S6TLzZWNM6XSvdWLop",
+      .payload =
+          "lYlNcO6RR4i9UW3G1DGjdJTRRGbqtPya2aj94ZRjIGZWoHwT5MB9ciAgnQf2VafYb9Tl"
+          "8SZkX37tg4yZ9pOb4lqslY4g4h58OmWjumghVRvrPUZDalUuK8OLs1Qoengpu9wccxAk"
+          "Bti2leDTNeiJDy36NnwS9aCIUc0ozsMvXfX1gWdBdmKbiRG1LvpNd6S7BNGG7Zly5zYj"
+          "xz7s6ZUSDoFfZe3eJWQ15ngYhgMw1TsfbECnMVQTYvY6OyqWPBQi5wiftFcluoxor8G5"
+          "RJ1NEDQq2q2FRfWjNHLhky92C2C7Nnfe4oVzSinfC1319uUkNLpSzI4MvEMi6g5Ukbl7"
+          "iGhpnX7Hp4xpBL3h2IkvGviDRQ98UvW0ugwUuPxm1NOQpjLG5dPoqQ0jrMst0Bl5rgPw"
+          "ajjNGsUWmp9r0ST0wRQXrQcY30PoSoqKSlCEgFMLzHWLrPQ86QFyCICismGSe7iBIqdD"
+          "6d37StvXBzfJoZVU79UeOF2bFvb3DNoArEOe"};
+  DeliveryBroker::getInstance().push(
+      message.messageID,
+      message.deliveryTag,
+      deviceID,
+      message.fromDeviceID,
+      message.payload);
+  EXPECT_EQ(DeliveryBroker::getInstance().isEmpty(deviceID), false);
+  DeliveryBroker::getInstance().erase(deviceID);
+  EXPECT_EQ(DeliveryBroker::getInstance().isEmpty(deviceID), true);
+}