Python: Add zope web tests from internal repo

python/ql/test/library-tests/web/zope/Test.expected

@@ -0,0 +1,3 @@
+| 12 | ControlFlowNode for implementer | class implementer | resources/lib/python/lib/zope/interface/declarations.py:352 |
+| 13 | ControlFlowNode for IThing | class IThing | test.py:4 |
+| 14 | ControlFlowNode for Thing | class Thing | test.py:9 |

python/ql/test/library-tests/web/zope/Test.ql

@@ -0,0 +1,10 @@
+import python
+import semmle.python.TestUtils
+
+from ControlFlowNode f, Object o, ControlFlowNode x
+where
+    exists(ExprStmt s | s.getValue().getAFlowNode() = f) and
+    f.refersTo(o, x) and
+    f.getLocation().getFile().getBaseName() = "test.py"
+select f.getLocation().getStartLine(), f.toString(), o.toString(),
+    remove_library_prefix(x.getLocation())

python/ql/test/library-tests/web/zope/options

@@ -0,0 +1 @@
+semmle-extractor-options: --max-import-depth=3 -p ../../../../resources/lib/python/lib/ --respect-init=False

python/ql/test/library-tests/web/zope/test.py

@@ -0,0 +1,14 @@
+
+from zope.interface import Interface, implementer
+
+class IThing(Interface):
+    pass
+
+
+@implementer(IThing)
+class Thing(object):
+    pass
+
+implementer
+IThing
+Thing