From 0b53fd7daaf0f2a7f7c221b447ec9e5c49f89f1a Mon Sep 17 00:00:00 2001
From: Matthew Honnibal <honnibal@gmail.com>
Date: Fri, 30 Jan 2015 18:02:58 +1100
Subject: [PATCH] * Add test for parse tree navigation

---
 tests/test_parse_navigate.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 tests/test_parse_navigate.py

diff --git a/tests/test_parse_navigate.py b/tests/test_parse_navigate.py
new file mode 100644
index 000000000..1bbfdafc2
--- /dev/null
+++ b/tests/test_parse_navigate.py
@@ -0,0 +1,28 @@
+from __future__ import unicode_literals
+from os import path
+import codecs
+
+from spacy.en import English
+
+import pytest
+
+
+@pytest.fixture
+def sun_text():
+    with codecs.open(path.join(path.dirname(__file__), 'sun.txt'), 'r', 'utf8') as file_:
+        text = file_.read()
+    return text
+
+
+@pytest.fixture
+def nlp():
+    return English()
+
+
+def test_consistency(nlp, sun_text):
+    tokens = nlp(sun_text)
+    for head in tokens:
+        for child in head.lefts:
+            assert child.head is head
+        for child in head.rights:
+            assert child.head is head