Tests: Reduced code duplication in database initializer tests

monkey/tests/unit_tests/monkey_island/cc/setup/mongo/test_database_initializer.py

@@ -1,4 +1,3 @@
-from pathlib import Path
 from unittest.mock import MagicMock
 
 import mongomock
@@ -8,49 +7,59 @@ from monkey_island.cc.setup.mongo.database_initializer import reset_database
 
 
 @pytest.fixture
-def fake_mongo(monkeypatch):
-    mongo = mongomock.MongoClient()
-    monkeypatch.setattr("monkey_island.cc.setup.mongo.database_initializer.mongo", mongo)
-    monkeypatch.setattr("monkey_island.cc.services.database.mongo", mongo)
-    return mongo
+def patch_attack_mitigations_path(monkeypatch, data_for_tests_dir):
+    def inner(file_name):
+        path = data_for_tests_dir / "mongo_mitigations" / file_name
+        monkeypatch.setattr(
+            "monkey_island.cc.setup.mongo.database_initializer.ATTACK_MITIGATION_PATH", path
+        )
+
+    return inner
+
+
+@pytest.fixture(scope="module", autouse=True)
+def patch_dependencies(monkeypatch_session):
+    monkeypatch_session.setattr(
+        "monkey_island.cc.services.config.ConfigService.init_config", lambda: None
+    )
+    monkeypatch_session.setattr(
+        "monkey_island.cc.services.attack.attack_config.AttackConfig.reset_config", lambda: None
+    )
+    monkeypatch_session.setattr(
+        "monkey_island.cc.services.database.jsonify", MagicMock(return_value=True)
+    )
 
 
 @pytest.fixture
-def fake_config(monkeypatch):
-    monkeypatch.setattr("monkey_island.cc.services.config.ConfigService.init_config", lambda: None)
-    monkeypatch.setattr("monkey_island.cc.services.attack.attack_config.AttackConfig.reset_config", lambda: None)
-    monkeypatch.setattr("monkey_island.cc.services.database.jsonify", MagicMock(return_value=True))
+def mock_mongo_client(monkeypatch):
+    mongo = mongomock.MongoClient()
+    mongo.db.validate_collection = MagicMock(return_value=True)
+
+    monkeypatch.setattr("monkey_island.cc.setup.mongo.database_initializer.mongo", mongo)
+    monkeypatch.setattr("monkey_island.cc.services.database.mongo", mongo)
+
+    return mongo
 
 
-def test_store_mitigations_on_mongo(monkeypatch, data_for_tests_dir, fake_mongo, fake_config):
-    monkeypatch.setattr(
-        "monkey_island.cc.setup.mongo.database_initializer.ATTACK_MITIGATION_PATH",
-        Path(data_for_tests_dir) / "mongo_mitigations" / "attack_mitigations.json",
-    )
-    fake_mongo.db.validate_collection = MagicMock(return_value=True)
+def test_store_mitigations_on_mongo(patch_attack_mitigations_path, mock_mongo_client):
+    patch_attack_mitigations_path("attack_mitigations.json")
+
     reset_database()
 
-    assert len(list(fake_mongo.db.attack_mitigations.find({}))) == 3
+    assert len(list(mock_mongo_client.db.attack_mitigations.find({}))) == 3
 
 
-def test_store_mitigations_on_mongo__invalid_mitigation(
-    monkeypatch, data_for_tests_dir, fake_mongo, fake_config
-):
-    monkeypatch.setattr(
-        "monkey_island.cc.setup.mongo.database_initializer.ATTACK_MITIGATION_PATH",
-        Path(data_for_tests_dir) / "mongo_mitigations" / "invalid_mitigation",
-    )
-    fake_mongo.db.validate_collection = MagicMock(return_value=True)
+def test_store_mitigations_on_mongo__invalid_mitigation(patch_attack_mitigations_path):
+    patch_attack_mitigations_path("invalid_mitigation")
+
     with pytest.raises(Exception):
         reset_database()
 
 
-def test_get_all_mitigations(monkeypatch, fake_mongo, fake_config):
-    fake_mongo.db.validate_collection = MagicMock(return_value=True)
-
+def test_get_all_mitigations(mock_mongo_client):
     reset_database()
 
-    mitigations = list(fake_mongo.db.attack_mitigations.find({}))
+    mitigations = list(mock_mongo_client.db.attack_mitigations.find({}))
 
     assert len(mitigations) >= 266