Added unit tests

tests/test_exception.py

@@ -0,0 +1,47 @@
+import unittest
+
+from aprsd import exception
+
+
+class TestExceptions(unittest.TestCase):
+    """Unit tests for custom exception classes."""
+
+    def test_missing_config_option_exception(self):
+        """Test MissingConfigOptionException."""
+        exc = exception.MissingConfigOptionException('test.option')
+        self.assertIsInstance(exc, Exception)
+        self.assertIn('test.option', exc.message)
+        self.assertIn("Option 'test.option' was not in config file", exc.message)
+
+    def test_config_option_bogus_default_exception(self):
+        """Test ConfigOptionBogusDefaultException."""
+        exc = exception.ConfigOptionBogusDefaultException(
+            'test.option', 'default_value'
+        )
+        self.assertIsInstance(exc, Exception)
+        self.assertIn('test.option', exc.message)
+        self.assertIn('default_value', exc.message)
+        self.assertIn('needs to be changed', exc.message)
+
+    def test_aprs_client_not_configured_exception(self):
+        """Test APRSClientNotConfiguredException."""
+        exc = exception.APRSClientNotConfiguredException()
+        self.assertIsInstance(exc, Exception)
+        self.assertEqual(exc.message, 'APRS client is not configured.')
+
+    def test_exception_inheritance(self):
+        """Test that exceptions inherit from Exception."""
+        exc1 = exception.MissingConfigOptionException('test')
+        exc2 = exception.ConfigOptionBogusDefaultException('test', 'default')
+        exc3 = exception.APRSClientNotConfiguredException()
+
+        self.assertIsInstance(exc1, Exception)
+        self.assertIsInstance(exc2, Exception)
+        self.assertIsInstance(exc3, Exception)
+
+    def test_exception_raising(self):
+        """Test that exceptions can be raised and caught."""
+        with self.assertRaises(exception.MissingConfigOptionException) as context:
+            raise exception.MissingConfigOptionException('test.option')
+
+        self.assertIn('test.option', str(context.exception))