diff --git a/services/tunnelbroker/test/ToolsTest.cpp b/services/tunnelbroker/test/ToolsTest.cpp
new file mode 100644
--- /dev/null
+++ b/services/tunnelbroker/test/ToolsTest.cpp
@@ -0,0 +1,72 @@
+#include "Tools.h"
+#include "Constants.h"
+
+#include <gtest/gtest.h>
+
+#include <string>
+
+using namespace comm::network;
+
+class ToolsTest : public testing::Test {};
+
+TEST(ToolsTest, GeneratedRandomStringHasValidLength) {
+  const std::size_t length = 32;
+  const std::string generated = tools::generateRandomString(length);
+  EXPECT_EQ(generated.length(), length)
+      << "Generated random string \"" << generated << "\" length "
+      << generated.length() << " is not equal to " << length;
+}
+
+TEST(ToolsTest, ValidateDeviceIDReturnsTrueOnStaticValidDeviceID) {
+  const std::string validDeviceID =
+      "mobile:EMQNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdoYAQRt0S6TLzZWNM6XSvdWqxm";
+  EXPECT_EQ(tools::validateDeviceID(validDeviceID), true)
+      << "Valid deviceID \"" << validDeviceID
+      << "\" is invalid by the function";
+}
+
+TEST(ToolsTest, ValidateDeviceIDReturnsTrueOnGeneratedValidDeviceID) {
+  const std::string validDeviceID =
+      "mobile:" + tools::generateRandomString(DEVICEID_CHAR_LENGTH);
+  EXPECT_EQ(tools::validateDeviceID(validDeviceID), true)
+      << "Valid generated deviceID \"" << validDeviceID
+      << "\" is invalid by the function";
+}
+
+TEST(ToolsTest, ValidateDeviceIDReturnsFalseOnInvalidDeviceIDPrefix) {
+  const std::string invalidDeviceIDPrefix =
+      "invalid-"
+      "EMQNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdoYAQRt0S6TLzZWNM6XSvdWqxm";
+  EXPECT_EQ(tools::validateDeviceID(invalidDeviceIDPrefix), false)
+      << "Invalid prefix deviceID \"" << invalidDeviceIDPrefix
+      << "\" is valid by the function";
+}
+
+TEST(ToolsTest, ValidateDeviceIDReturnsFalseOnInvalidDeviceIDSuffix) {
+  const std::string invalidDeviceIDSuffix =
+      "mobile:tQNoQ7b2ueEmQ4QsevRWlXxFCNt055y20T1PHdoYAQRt0S6TLzZWNM6XSvdWqxm";
+  EXPECT_EQ(tools::validateDeviceID(invalidDeviceIDSuffix), false)
+      << "Invalid suffix deviceID \"" << invalidDeviceIDSuffix
+      << "\" is valid by the function";
+}
+
+TEST(ToolsTest, ValidateSessionIDReturnsTrueOnValidStaticSessionID) {
+  const std::string validSessionID = "bc0c1aa2-bf09-11ec-9d64-0242ac120002";
+  EXPECT_EQ(tools::validateSessionID(validSessionID), true)
+      << "Valid sessionID \"" << validSessionID
+      << "\" is invalid by the function";
+}
+
+TEST(ToolsTest, ValidateSessionIDReturnsTrueOnValidGeneratedSessionID) {
+  const std::string validSessionID = tools::generateUUID();
+  EXPECT_EQ(tools::validateSessionID(validSessionID), true)
+      << "Valid generated sessionID \"" << validSessionID
+      << "\" is invalid by the function";
+}
+
+TEST(ToolsTest, ValidateSessionIDReturnsFalseOnInvalidSessionID) {
+  const std::string invalidSessionID = "bc0c1aa29bf09-11ec-9d64-0242ac120002";
+  EXPECT_EQ(tools::validateSessionID(invalidSessionID), false)
+      << "Invalid sessionID \"" << invalidSessionID
+      << "\" is valid by the function";
+}