add recursive API-graph test

Author: erik-krogh

python/ql/test/library-tests/ApiGraphs/py3/deftest1.py

@@ -44,4 +44,18 @@ def namedCallback(myName, otherName):
 
 foo.blob(namedCallback) #$ use=moduleImport("mypkg").getMember("foo").getMember("blob").getReturn()
 
-foo.named(myName = 2) #$ def=moduleImport("mypkg").getMember("foo").getMember("named").getNamedParameter("myName")
+foo.named(myName = 2) #$ def=moduleImport("mypkg").getMember("foo").getMember("named").getNamedParameter("myName")
+
+
+def recusisionCallback(x):
+    x.recursion() #$ use=moduleImport("mypkg").getMember("foo").getMember("rec").getParameter(0).getMember("callback").getParameter(0).getMember("recursion").getReturn()
+    x.recursion() #$ use=moduleImport("mypkg").getMember("foo").getMember("rec").getParameter(0).getMember("rec1").getMember("callback").getParameter(0).getMember("recursion").getReturn()
+    x.recursion() #$ use=moduleImport("mypkg").getMember("foo").getMember("rec").getParameter(0).getMember("rec1").getMember("rec2").getMember("callback").getParameter(0).getMember("recursion").getReturn()
+    x.recursion() #$ use=moduleImport("mypkg").getMember("foo").getMember("rec").getParameter(0).getMember("rec1").getMember("rec2").getMember("rec1").getMember("callback").getParameter(0).getMember("recursion").getReturn()
+
+recursiveDict = {};
+recursiveDict.callback = recusisionCallback;
+recursiveDict.rec1 = recursiveDict;
+recursiveDict.rec2 = recursiveDict;
+
+foo.rec(recursiveDict); #$ def=moduleImport("mypkg").getMember("foo").getMember("rec").getParameter(0)