Add regression test for #717

spacy/tests/regression/test_issue717.py

@@ -0,0 +1,15 @@
+# coding: utf8
+from __future__ import unicode_literals
+
+import pytest
+
+
+@pytest.mark.xfail
+@pytest.mark.models
+@pytest.mark.parametrize('text1,text2', [("You're happy", "You are happy")])
+def test_issue717(EN, text1, text2):
+    """Test that contractions are assigned the correct lemma."""
+    doc1 = EN(text1)
+    doc2 = EN(text2)
+    assert doc1[1].lemma_ == doc2[1].lemma_
+    assert doc1[1].lemma == doc2[1].lemma