fix codacy-bot warrning

src/tests/unit/test_app.py

@@ -10,21 +10,23 @@ from src import app
 class TestApp(TestCase):
     """Unit test class to test other methods in the app."""
 
-    """create symlink"""
+    #create symlink
+    @classmethod
     def test_symlink_correct(self):
         os.mknod(os.path.join("./","testFile1.txt"))
         app.symlink_force(os.path.join("./","testFile1.txt"),os.path.join("./","link_testFile1.txt"))
         os.remove(os.path.join("./","testFile1.txt"))
         os.remove(os.path.join("./","link_testFile1.txt"))
 
-    """ link already exist"""
+    #link already exist
+    @classmethod
     def test_symlink_already_exist(self):
         os.mknod(os.path.join("./","testFile2.txt"))
         os.mknod(os.path.join("./","link_testFile2.txt"))
         app.symlink_force(os.path.join("./","testFile2.txt"),os.path.join("./","link_testFile2.txt"))
         os.remove(os.path.join("./","testFile2.txt"))
         os.remove(os.path.join("./","link_testFile2.txt"))
-    
+
     def test_valid_env(self):
         key = 'ENV_1'
         os.environ[key] = 'test'