diff --git a/nest_backend/test/test_4_alert.py b/nest_backend/test/test_4_alert.py
new file mode 100644
index 0000000..e28deb4
--- /dev/null
+++ b/nest_backend/test/test_4_alert.py
@@ -0,0 +1,87 @@
+from flask.testing import Client
+
+'''A file that contains tests of classes and methods for all the requests concerning an user.'''
+
+
+# test del file repository_conditions
+
+
+class TestAlertsGetAllOfARepository:
+    def test_repository_not_found(self, flask_client: Client, user_headers):
+        r = flask_client.get(f'/api/v1/repositories/99/alerts', headers=user_headers)
+        assert r.status_code == 404
+        assert r.json["result"] == "failure"
+
+    def test_unauthorized_repository(self, flask_client: Client, admin_headers):
+        r = flask_client.get(f'/api/v1/repositories/1/alerts', headers=admin_headers)
+        assert r.status_code == 403
+        assert r.json["result"] == "failure"
+
+    def test_get_all_alerts_of_a_repository(self, flask_client: Client, user_headers):
+        r = flask_client.get(f'/api/v1/repositories/1/alerts', headers=user_headers)
+        assert r.status_code == 200
+        assert r.json["result"] == "success"
+
+'''
+class TestConditionPost:
+    def test_missing_type(self, flask_client: Client, user_headers):
+        r = flask_client.post(f'/api/v1/repositories/1/conditions', headers=user_headers,
+                              json={})
+        assert r.status_code == 400
+        assert r.json["result"] == "failure"
+
+    def test_wrong_type(self, flask_client: Client, user_headers):
+        r = flask_client.post(f'/api/v1/repositories/1/conditions', headers=user_headers,
+                              json={"content": "string", "type": 99})
+        assert r.status_code == 400
+        assert r.json["result"] == "failure"
+
+    def test_missing_content(self, flask_client: Client, user_headers):
+        r = flask_client.post(f'/api/v1/repositories/1/conditions', headers=user_headers,
+                              json={"type": 0})
+        assert r.status_code == 400
+        assert r.json["result"] == "failure"
+
+    def test_for_success(self, flask_client: Client, user_headers):
+        r = flask_client.post(f'/api/v1/repositories/1/conditions', headers=user_headers,
+                              json={"content": "onlyForTest", "type": 0})
+        assert r.status_code == 201
+        assert r.json["result"] == "success"
+
+    # test del file condition
+
+
+class TestOneConditionOfARepository:
+    def test_condition_not_found(self, flask_client: Client, user_headers):
+        r = flask_client.get(f'/api/v1/conditions/99', headers=user_headers)
+        assert r.status_code == 404
+        assert r.json["result"] == "failure"
+
+    # test GET
+    def test_get_condition(self, flask_client: Client, user_headers):
+        r = flask_client.get(f'/api/v1/conditions/3', headers=user_headers)
+        assert r.status_code == 200
+        assert r.json["result"] == "success"
+
+    # test PATCH
+    def test_patch_condition_no_json(self, flask_client: Client, user_headers):
+        r = flask_client.patch(f'/api/v1/conditions/3', headers=user_headers)
+        assert r.status_code == 400
+        assert r.json["result"] == "failure"
+
+    def test_patch_condition_wrong_type(self, flask_client: Client, user_headers):
+        r = flask_client.patch(f'/api/v1/conditions/3', headers=user_headers,
+                               json={"content": "string", "type": 99})
+        assert r.status_code == 400
+        assert r.json["result"] == "failure"
+
+    def test_patch_condition_for_success(self, flask_client: Client, user_headers):
+        r = flask_client.patch(f'/api/v1/conditions/3', headers=user_headers,
+                               json={"content": "patchedForTest", "type": 0})
+        assert r.status_code == 204
+
+    # test DELETE
+    def test_delete_condition_for_success(self, flask_client: Client, user_headers):
+        r = flask_client.delete(f'/api/v1/conditions/3', headers=user_headers)
+        assert r.status_code == 204
+'''