Add test for #1945: PhraseMatcher regression

spacy/tests/regression/test_issue1945.py

@@ -0,0 +1,17 @@
+'''Test regression in PhraseMatcher introduced in v2.0.6.'''
+from __future__ import unicode_literals
+import pytest
+
+from ...lang.en import English
+from ...matcher import PhraseMatcher
+
+@pytest.mark.xfail
+def test_issue1945():
+    text = "deep machine learning"
+    mw_list = ["machine learning", "deep blue", "planing machine"]
+
+    nlp = English()
+    matcher = PhraseMatcher(nlp.vocab)
+    matcher.add("MWE", None, *[nlp.tokenizer(item) for item in mw_list])
+
+    assert len(matcher(nlp(text))) == 1