Fix broken tests

Author: gatkin

azure-pipelines.yml

@@ -7,7 +7,7 @@ jobs:
     - task: UsePythonVersion@0
       displayName: Setup Python
       inputs:
-        versionSpec: '3.7.0'
+        versionSpec: '3.7'
 
     - template: azure-steps/install_deps.yml
 
@@ -23,7 +23,7 @@ jobs:
     - task: UsePythonVersion@0
       displayName: Setup Python
       inputs:
-        versionSpec: '3.7.0'
+        versionSpec: '3.7'
 
     - template: azure-steps/install_deps.yml
 
@@ -40,7 +40,7 @@ jobs:
         python27:
           python.version: '2.7'
         python37:
-          python.version: '3.7.0'
+          python.version: '3.7'
 
     steps:
     - template: azure-steps/test.yml
@@ -56,7 +56,7 @@ jobs:
         python27:
           python.version: '2.7'
         python37:
-          python.version: '3.7.0'
+          python.version: '3.7'
 
     steps:
     - template: azure-steps/test.yml
@@ -72,7 +72,7 @@ jobs:
         python27:
           python.version: '2.7'
         python37:
-          python.version: '3.7.0'
+          python.version: '3.7'
 
     steps:
     - template: azure-steps/test.yml
@@ -94,7 +94,7 @@ jobs:
     - task: UsePythonVersion@0
       displayName: Setup Python
       inputs:
-        versionSpec: '3.7.0'
+        versionSpec: '3.7'
 
     - task: PyPIPublisher@0
       displayName: Package and Publish to PyPI

tests/test_errors.py

@@ -31,15 +31,15 @@ def test_parse(self):
         with pytest.raises(self.expected_exception_type) as exception_info:
             xml.parse_from_string(self.processor, self.xml_string)
 
-        actual_message = str(exception_info)
+        actual_message = str(exception_info.value)
         assert actual_message.endswith(self.expected_message)
 
     def test_serialize(self):
         """Tests serializing with error message"""
         with pytest.raises(self.expected_exception_type) as exception_info:
             xml.serialize_to_string(self.processor, self.value)
 
-        actual_message = str(exception_info)
+        actual_message = str(exception_info.value)
         assert actual_message.endswith(self.expected_message)
 
 

tests/test_hooks_validation.py

@@ -238,13 +238,14 @@ def _assert_error_message(processor, value, xml_string, expected_location):
         with pytest.raises(_ValidationError) as parse_exception:
             xml.parse_from_string(processor, xml_string)
 
-        actual_parse_message = str(parse_exception)
+        actual_parse_message = str(parse_exception.value)
+        print(actual_parse_message)
         assert actual_parse_message.endswith(expected_location)
 
         with pytest.raises(_ValidationError) as serialize_exception:
             xml.serialize_to_string(processor, value)
 
-        actual_serialize_message = str(serialize_exception)
+        actual_serialize_message = str(serialize_exception.value)
         assert actual_serialize_message.endswith(expected_location)
 
     @property