Adding detect-raw-datetime-manipulation option

testing/resources/detect_datetime_raw_manipulation/raw_timedelta_usage__clean.py

@@ -0,0 +1,27 @@
+import datetime
+from datetime import timedelta
+
+
+def dummy_func(inp):
+    print(inp)
+
+
+def move_time_forward():
+    now = datetime.datetime.now()
+
+    # Check commented out lines
+    # now += timedelta(days=1)
+    # now += datetime.timedelta(weeks=1)
+    #
+    # now -= timedelta(weeks=1)
+    # now -= timedelta(weeks=2)
+    #
+    # now = now.replace(hour=2)
+    # now = now.replace(tzinfo=None)
+    # now = now.replace(hour=1, tzinfo=pytz.utc)
+
+    # Test regular usage of timedelta & datetime
+    dummy_func(timedelta(days=1))
+    dummy_func(datetime.datetime(2018, 10, 11, 2, 3, 4, 450000))
+
+    print(now)

testing/resources/detect_datetime_raw_manipulation/raw_timedelta_usage__flag.py

@@ -0,0 +1,37 @@
+import datetime
+from datetime import timedelta
+
+import pytz
+
+
+def move_time_forward():
+    now = datetime.datetime.now()
+    timezone = pytz.utc
+
+    # 1
+    now = datetime.datetime(now.year, now.month, now.day, hour=8, minute=0, tzinfo=timezone)
+
+    # 2
+    now += timedelta(days=1)
+    # 3
+    now += datetime.timedelta(weeks=1)
+    # 4
+    now = now + timedelta(seconds=1)
+
+    # 5
+    now -= datetime.timedelta(weeks=1)
+    # 6
+    now -= timedelta(weeks=2)
+    # 7
+    now = now - timedelta(seconds=1)
+
+    now = now.replace(hour=2)
+    # 8
+    now = now.replace(tzinfo=None)
+    # 9
+    now = now.replace(hour=1, tzinfo=pytz.utc)
+
+    # 10
+    now = datetime.datetime(2018, 10, 11, 2, 3, 4, 450000, tzinfo=pytz.utc)
+
+    print(now)

testing/resources/detect_datetime_raw_manipulation/raw_timedelta_usage__ignore.py

@@ -0,0 +1,20 @@
+import datetime
+from datetime import timedelta
+
+import pytz
+
+
+def move_time_forward():
+    now = datetime.datetime.now()
+
+    now += timedelta(days=1)  # safe_dt_op
+    now += datetime.timedelta(weeks=1)  # safe_dt_op
+
+    now -= timedelta(weeks=1)  # safe_dt_op
+    now -= timedelta(weeks=2)  # safe_dt_op
+
+    now = now.replace(hour=2)
+    now = now.replace(tzinfo=None)  # safe_dt_op
+    now = now.replace(hour=1, tzinfo=pytz.utc)  # safe_dt_op
+
+    print(now)