diff --git a/datasetter/utils.py b/datasetter/utils.py
new file mode 100644
index 0000000..518fc12
--- /dev/null
+++ b/datasetter/utils.py
@@ -0,0 +1,16 @@
+def doc_equal(doc1, doc2):
+    """Test if two JSON-like documents are equel."""
+    try:
+        if isinstance(doc1, dict):
+            assert isinstance(doc2, dict)
+            for key in doc1.keys():
+                assert key in doc2 and doc_equal(doc1[key], doc2[key])
+        elif isinstance(doc1, list):
+            assert isinstance(doc2, list) and len(doc1) == len(doc2)
+            for x, y in zip(doc1, doc2):
+                assert doc_equal(x, y)
+        else:
+            assert doc1 == doc2
+        return True
+    except AssertionError:
+        return False
diff --git a/test/__init__.py b/test/__init__.py
new file mode 100644
index 0000000..e69de29