Add test case for input normalization

Author: knutwannheden

rewrite/tests/python/all/import_test.py

@@ -1,3 +1,5 @@
+import pytest
+
 from rewrite.test import rewrite_run, python
 
 
@@ -13,6 +15,13 @@ def test_simple_with_alias():
     rewrite_run(python("import io as io"))
 
 
+# noinspection PyUnresolvedReferences
+@pytest.mark.xfail(reason="The parser performs Unicode normalization which can't be disabled", strict=True)
+def test_unicode_char_normalization():
+    # language=python
+    rewrite_run(python("from .main import MaµToMan"))
+
+
 # noinspection PyUnresolvedReferences
 def test_qualified():
     # language=python