add extra tests for exceptions

satella/exceptions.py

 class BaseSatellaException(Exception):
-    def __init__(self, msg):
-        super(BaseSatellaException, self).__init__()
+    def __init__(self, msg, *args, **kwargs):
+        super().__init__(*((msg, )+args))
         self.msg = msg
 
     def __str__(self):
-        return '%s(%s)' % (self.__class__.__qualname__, repr(self.msg),)
+        return '%s(%s)' % ((self.__class__.__qualname__,) + self.args)
 
 
 class ResourceLocked(BaseSatellaException):

tests/test_exceptions.py

+import unittest
+import typing as tp
+from satella.exceptions import BaseSatellaException
+
+
+class TestExceptions(unittest.TestCase):
+    def test_exception(self):
+        try:
+            raise BaseSatellaException('message', 'arg1', 'arg2')
+        except BaseSatellaException as e:
+            self.assertIn('arg1', str(e))
+            self.assertIn('arg2', str(e))
+        else:
+            self.fail()