Add regression test for #891

spacy/tests/regression/test_issue891.py

@@ -0,0 +1,12 @@
+# coding: utf8
+from __future__ import unicode_literals
+
+import pytest
+
+@pytest.mark.xfail
+@pytest.mark.parametrize('text', ["want/need"])
+def test_issue891(en_tokenizer, text):
+    """Test that / infixes are split correctly."""
+    tokens = en_tokenizer(text)
+    assert len(tokens) == 3
+    assert tokens[1].text == "/"