Python: Move dataflow tests out of experimental

python/ql/test/library-tests/dataflow/variable-capture/in.py

@@ -0,0 +1,97 @@
+# Here we test the case where a captured variable is being read.
+
+# All functions starting with "test_" should run and execute `print("OK")` exactly once.
+# This can be checked by running validTest.py.
+
+import sys
+import os
+
+sys.path.append(os.path.dirname(os.path.dirname((__file__))))
+from testlib import expects
+
+# These are defined so that we can evaluate the test code.
+NONSOURCE = "not a source"
+SOURCE = "source"
+
+def is_source(x):
+    return x == "source" or x == b"source" or x == 42 or x == 42.0 or x == 42j
+
+
+def SINK(x):
+    if is_source(x):
+        print("OK")
+    else:
+        print("Unexpected flow", x)
+
+
+def SINK_F(x):
+    if is_source(x):
+        print("Unexpected flow", x)
+    else:
+        print("OK")
+
+# Capture the parameter of an outer function.
+def inParam(tainted):
+    def captureIn1():
+        sinkI1 = tainted
+        SINK(sinkI1) #$ captured
+    captureIn1()
+
+    def captureIn2():
+        def m():
+            sinkI2 = tainted
+            SINK(sinkI2) #$ captured
+        m()
+    captureIn2()
+
+    captureIn3 = lambda arg: SINK(tainted) #$ captured
+    captureIn3("")
+
+    def captureIn1NotCalled():
+        nonSink1 = tainted
+        SINK_F(nonSink1)
+
+    def captureIn2NotCalled():
+        # notice that `m` is not called
+        def m():
+            nonSink1 = tainted
+            SINK_F(nonSink1)
+    captureIn2NotCalled()
+
+@expects(3)
+def test_inParam():
+    inParam(SOURCE)
+
+# Capture the local variable of an outer function.
+def inLocal():
+    tainted = SOURCE
+
+    def captureIn1():
+        sinkI1 = tainted
+        SINK(sinkI1) #$ captured
+    captureIn1()
+
+    def captureIn2():
+        def m():
+            sinkI2 = tainted
+            SINK(sinkI2) #$ captured
+        m()
+    captureIn2()
+
+    captureIn3 = lambda arg: SINK(tainted) #$ captured
+    captureIn3("")
+
+    def captureIn1NotCalled():
+        nonSink1 = tainted
+        SINK_F(nonSink1)
+
+    def captureIn2NotCalled():
+        # notice that `m` is not called
+        def m():
+            nonSink2 = tainted
+            SINK_F(nonSink2)
+    captureIn2NotCalled()
+
+@expects(3)
+def test_inLocal():
+    inLocal()