FIX: Show DDBC error messages in exceptions for unknown codes (#40)

* FIX: Show ddbc error messages in exceptions for unknown codes

* fixing tests

Author: bewithgaurav

mssql_python/exceptions.py

@@ -645,6 +645,6 @@ def raise_exception(sqlstate: str, ddbc_error: str) -> None:
             logger.error(exception_class)
         raise exception_class
     raise DatabaseError(
-        driver_error="An error occurred with SQLSTATE code",
-        ddbc_error=f"Unknown DDBC error: {sqlstate}",
+        driver_error=f"An error occurred with SQLSTATE code: {sqlstate}",
+        ddbc_error=f"{ddbc_error}" if ddbc_error else f"Unknown DDBC error",
     )

tests/test_005_exceptions.py

@@ -71,7 +71,7 @@ def test_not_supported_error_exception():
 def test_unknown_error_exception():
     with pytest.raises(DatabaseError) as excinfo:
         raise_exception('99999', 'Unknown error')
-    assert str(excinfo.value) == "Driver Error: An error occurred with SQLSTATE code; DDBC Error: Unknown DDBC error: 99999"
+    assert str(excinfo.value) == "Driver Error: An error occurred with SQLSTATE code: 99999; DDBC Error: Unknown error"
 
 def test_syntax_error(cursor):
     with pytest.raises(ProgrammingError) as excinfo: