diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..16d3c4d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.cache
diff --git a/check.py b/check.py
new file mode 100755
index 0000000..262e7e4
--- /dev/null
+++ b/check.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+
+import os,generate,json
+import generate
+
+
+# basic tests for quality, not some kind of guarantee that it
+# works.  Run generate.py at least once successfully before
+# you try this, it will load up the cache
+
+#http://www.loc.gov/marc/bibliographic/concise/bd264.html
+#_marc_bibliographic_concise_bd264.html
+
+class FakeCacher(object):
+	def fetch_text(self,url):
+		return open(os.path.join(".cache","_marc_bibliographic_concise_bd264.html")).read()
+
+c = generate.Crawler(FakeCacher())
+tag, data = c.get_field_data("whateva")
+
+assert '264' == tag, "test file contained unexpected tag %s" % tag
+assert 'indicators' in data, "264 tag didn't contain indicators"
+assert 'subfields' in data, "264 tag didn't contain subfields"
+assert len(data['subfields']) ==  6, "Unexpected # of subfields (%d)" % len(data['subfields'])
+
+c = generate.Crawler()
+d = c.as_dict()
+for tag, data in d.iteritems():
+    if data['control_field']:
+        assert 'indicators' not in data, "Control field %s contained indicators" % tag
+        assert 'subfields' not in data, "Control field %s contained subfields"%tag
+    else:
+        assert 'indicators' in data, "Field %s had no indicators" % tag
+        assert 'subfields' in data, "Field %s had no subfields" % tag
+        for sf, d in data['subfields'].iteritems():
+            assert 'repeatable' in d
+            assert 'definition' in d
+
+
+
+