Merge pull request github#17765 from yoff/python/test-functional-behaviour

Python: Add tests for functional-like programming

Author: yoff

python/ql/test/library-tests/dataflow/coverage/functional.py

@@ -0,0 +1,67 @@
+# 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")
+
+# ------------------------------------------------------------------------------
+# Actual tests
+# ------------------------------------------------------------------------------
+
+def read_sql(sql):
+    SINK(sql) # $ flow="SOURCE, l:+5 -> sql"
+
+def process(func, arg): 
+    func(arg) 
+
+process(func=read_sql, arg=SOURCE)
+
+
+def read_sql_star(sql):
+    SINK(sql) # $ MISSING: flow="SOURCE, l:+5 -> sql"
+
+def process_star(func, *args): 
+    func(*args) 
+
+process_star(read_sql_star, SOURCE)
+
+
+def read_sql_dict(sql):
+    SINK(sql) # $ flow="SOURCE, l:+5 -> sql"
+
+def process_dict(func, **args): 
+    func(**args) 
+
+process_dict(func=read_sql_dict, sql=SOURCE)
+
+
+# TODO:
+# Consider adding tests for
+# threading.Thread, multiprocess.Process,
+# concurrent.futures.ThreadPoolExecutor,
+# and concurrent.futures.ProcessPoolExecutor.

python/ql/test/library-tests/dataflow/validTest.py

@@ -66,6 +66,7 @@ def check_tests_valid_after_version(testFile, version):
     check_tests_valid("coverage.datamodel")
     check_tests_valid("coverage.test_builtins")
     check_tests_valid("coverage.loops")
+    check_tests_valid("coverage.functional")
     check_tests_valid("coverage-py2.classes")
     check_tests_valid("coverage-py3.classes")
     check_tests_valid("variable-capture.in")