Add regression test for explosion#3328

spacy/tests/regression/test_issue3328.py

@@ -0,0 +1,21 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import pytest
+from spacy.matcher import Matcher
+from spacy.tokens import Doc
+
+
+@pytest.mark.xfail
+def test_issue3328(en_vocab):
+    doc = Doc(en_vocab, words=["Hello", ",", "how", "are", "you", "doing", "?"])
+    matcher = Matcher(en_vocab)
+    patterns = [
+        [{"LOWER": {"IN": ["hello", "how"]}}],
+        [{"LOWER": {"IN": ["you", "doing"]}}],
+    ]
+    matcher.add("TEST", None, *patterns)
+    matches = matcher(doc)
+    assert len(matches) == 4
+    matched_texts = [doc[start:end].text for _, start, end in matches]
+    assert matched_texts == ["Hello", "how", "you", "doing"]