Test filename is included in parse errors

test/test_parser.py

+from __future__ import unicode_literals
+
+import sys
+if sys.version_info < (2, 7):
+    from StringIO import StringIO
+else:
+    from io import StringIO
+    
+import pytest
+
+import pytoml as toml
+
+
+def test_name_of_fileobj_is_used_in_errors():
+    source = StringIO("[")
+    source.name = "<source>"
+    error = pytest.raises(toml.TomlError, lambda: toml.load(source))
+    assert error.value.filename == "<source>"
+
+
+def test_when_fileobj_has_no_name_attr_then_repr_of_fileobj_is_used_in_errors():
+    source = StringIO("[")
+    error = pytest.raises(toml.TomlError, lambda: toml.load(source))
+    assert error.value.filename == repr(source)