Index: tests/protocols/CMakeLists.txt
===================================================================
--- tests/protocols/CMakeLists.txt
+++ tests/protocols/CMakeLists.txt
@@ -1 +1,2 @@
 add_subdirectory(oscar)
+add_subdirectory(qq)
Index: tests/protocols/qq/CMakeLists.txt
===================================================================
--- /dev/null
+++ tests/protocols/qq/CMakeLists.txt
@@ -0,0 +1,22 @@
+find_package(Qt5 REQUIRED COMPONENTS Test)
+include_directories(
+    ${CMAKE_SOURCE_DIR}/protocols/qq
+    ${CMAKE_SOURCE_DIR}/protocols/qq/icons
+    ${CMAKE_SOURCE_DIR}/protocols/qq/ui
+    ${KOPETE_SOURCE_DIR}
+)
+
+set(
+    QQ_TEST_LIBRARIES
+    KF5::KDELibs4Support
+    Qt5::Test
+    ${CMAKE_SOURCE_DIR}/protocols/qq/crypt.cpp
+)
+
+# Test for crypt(TEA)
+set(qqcrypttest_SRCS qqcrypttest.cpp)
+ecm_add_test(
+    ${qqcrypttest_SRCS}
+    LINK_LIBRARIES ${QQ_TEST_LIBRARIES}
+)
+
Index: tests/protocols/qq/qqcrypttest.cpp
===================================================================
--- /dev/null
+++ tests/protocols/qq/qqcrypttest.cpp
@@ -0,0 +1,47 @@
+#include "crypt.h"
+
+#include <QtTest>
+#include <QObject>
+
+class QQCryptTest : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void CryptTest();
+};
+
+void QQCryptTest::CryptTest()
+{
+    char input[2]={'a','b'}; /* This character which is going to encrypt */
+
+    /* data which is going to  encrypt */
+    unsigned int a[2]={(unsigned int)input[0],(unsigned int)input[1]};
+
+    /* encrypted data && input for decipher function */
+    unsigned int b[2]={0,0};
+
+    /* output after decrypt */
+    unsigned int c[2]={0,0};
+
+    /* key which is going to used in encryption */
+    const unsigned int k[4]={1,2,3,4};
+
+    /* void TEA::encipher(unsigned int *const v, const unsigned int *const k, unsigned int *const w); */
+    TEA::encipher(a, k, b);
+
+    char encrypted[2]={(char)b[0],(char)b[1]};
+
+    /* void TEA::decipher(unsigned int *const v, const unsigned int *const k, unsigned int *const w); */
+    TEA::decipher(b, k, c);
+
+    char output[2]={(char)c[0],(char)c[1]};
+
+    QVERIFY(input[0] != encrypted[0]);
+    QVERIFY(input[1] != encrypted[1]);
+    QCOMPARE(input[0],output[0]);
+    QCOMPARE(input[1],output[1]);
+}
+
+QTEST_MAIN(QQCryptTest)
+#include "qqcrypttest.moc"