Python: extra tests for comprehension

Author: yoff

python/ql/test/library-tests/frameworks/tornado/taint_test.py

@@ -64,6 +64,8 @@ def get(self, name = "World!", number="0", foo="foo"):  # $ requestHandler route
             request.headers.get_list("header-name"), # $ tainted
             request.headers.get_all(), # $ tainted
             [(k, v) for (k, v) in request.headers.get_all()], # $ MISSING: tainted
+            [(k, v) for (k, v) in request.headers.get_all()][0], # $ tainted
+            list([(k, v) for (k, v) in request.headers.get_all()]), # $ MISSING: tainted
 
             # Dict[str, http.cookies.Morsel]
             request.cookies, # $ tainted