--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/hghaveaddon.py	Thu Sep 21 10:45:27 2017 +0200
@@ -0,0 +1,14 @@
+import hghave
+
+@hghave.check("docgraph-ext", "Extension to generate graph from repository")
+def docgraph():
+    try:
+        import hgext.docgraph
+        hgext.docgraph.cmdtable # trigger import
+    except ImportError:
+        try:
+            import hgext3rd.docgraph
+            hgext3rd.docgraph.cmdtable # trigger import
+        except ImportError:
+            return False
+    return True