fix ignoring packages that are imported after freezing

fixes #420

freezegun/api.py

@@ -322,7 +322,11 @@ def __sub__(self, other):
 
     @classmethod
     def today(cls):
-        result = cls._date_to_freeze() + cls._tz_offset()
+        if _should_use_real_time():
+            result = real_date.today() + cls._tz_offset()
+        else:
+            result = cls._date_to_freeze() + cls._tz_offset()
+
         return date_to_fakedate(result)
 
     @staticmethod
@@ -383,7 +387,11 @@ def timestamp(self):
 
     @classmethod
     def now(cls, tz=None):
-        now = cls._time_to_freeze() or real_datetime.now()
+        if _should_use_real_time():
+            now = real_datetime.now()
+        else:
+            now = cls._time_to_freeze() or real_datetime.now()
+
         if tz:
             result = tz.fromutc(now.replace(tzinfo=tz)) + cls._tz_offset()
         else:
@@ -407,7 +415,10 @@ def today(cls):
 
     @classmethod
     def utcnow(cls):
-        result = cls._time_to_freeze() or real_datetime.utcnow()
+        if _should_use_real_time():
+            result = real_datetime.utcnow()
+        else:
+            result = cls._time_to_freeze() or real_datetime.utcnow()
         return datetime_to_fakedatetime(result)
 
     @staticmethod

tests/another_module.py

@@ -61,3 +61,18 @@ def get_fake_gmtime():
 
 def get_fake_strftime():
     return fake_strftime
+
+
+# Getters
+
+
+def get_datetime_now():
+    return datetime.now()
+
+
+def get_datetime_utcnow():
+    return datetime.utcnow()
+
+
+def get_date_today():
+    return date.today()

tests/test_class_import.py

@@ -178,7 +178,30 @@ def test_import_after_start():
     assert another_module.get_fake_localtime() is fake_localtime
     assert another_module.get_fake_gmtime() is fake_gmtime
     assert another_module.get_fake_strftime() is fake_strftime
-    del sys.modules['tests.another_module']
+
+    del sys.modules["tests.another_module"]
+    del sys.modules["tests"]
+    del another_module
+
+
+def test_ignore_import_after_start():
+    with freeze_time("2012-01-14", ignore=["tests.another_module"]):
+        assert "tests.another_module" not in sys.modules.keys()
+        from tests import another_module
+
+        utcnow = another_module.get_datetime_utcnow()
+        assert utcnow != FakeDatetime(2012, 1, 14)
+
+        now = another_module.get_datetime_now()
+        assert now != FakeDatetime(2012, 1, 14)
+
+        today = another_module.get_date_today()
+        assert today != FakeDate(2012, 1, 14)
+
+    del sys.modules["tests.another_module"]
+    del sys.modules["tests"]
+    del another_module
+
 
 def test_none_as_initial():
     with freeze_time() as ft: