diff --git a/src/tests/unit/test_app.py b/src/tests/unit/test_app.py
index 93c555e..8acf3d5 100644
--- a/src/tests/unit/test_app.py
+++ b/src/tests/unit/test_app.py
@@ -9,6 +9,19 @@ from src import app
 
 class TestApp(TestCase):
     """Unit test class to test other methods in the app."""
+    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"""
+    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'