Fix unhashable exception

coveralls/exception.py

@@ -6,3 +6,6 @@ def __eq__(self, other):
 
     def __ne__(self, other):
         return not self.__eq__(other)
+
+    def __hash__(self):
+        return hash(str(self))

tests/api/exception_test.py

@@ -0,0 +1,41 @@
+# pylint: disable=no-self-use
+import logging
+import unittest
+
+import pytest
+
+from coveralls.exception import CoverallsException
+
+class CoverallsExceptionTest(unittest.TestCase):
+
+    _caplog = None
+
+    @pytest.fixture(autouse=True)
+    def inject_fixtures(self, caplog):
+        self._caplog = caplog
+
+    def test_log(self):
+        self._caplog.set_level(logging.INFO)
+        exc_value = ''
+        try:
+            raise CoverallsException('Some exception')
+        except CoverallsException as e:
+            logging.exception('Found exception')
+            assert 'raise CoverallsException(' in \
+                self._caplog.text
+            exc_value = str(e)
+
+        assert exc_value == 'Some exception'
+
+    def test_eq(self):
+        exc1 = CoverallsException('Value1')
+        exc2 = CoverallsException('Value1')
+        assert exc1 == exc2
+        assert not exc1 == 35  # pylint: disable=unneeded-not
+        assert exc1 is not exc2
+
+    def test_ne(self):
+        exc1 = CoverallsException('Value1')
+        exc2 = CoverallsException('Value2')
+        assert exc1 != exc2
+        assert exc1 is not exc2