Function test_cantrace

Lib/test/audit-tests.py:269–299

()

def test_cantrace():
    traced = []

    def trace(frame, event, *args):
        if frame.f_code == TestHook.__call__.__code__:
            traced.append(event)

    old = sys.settrace(trace)
    try:
        with TestHook() as hook:
            # No traced call
            eval("1")

            # No traced call
            hook.__cantrace__ = False
            eval("2")

            # One traced call
            hook.__cantrace__ = True
            eval("3")

            # Two traced calls (writing to private member, eval)
            hook.__cantrace__ = 1
            eval("4")

            # One traced call (writing to private member)
            hook.__cantrace__ = 0
    finally:
        sys.settrace(old)

    assertSequenceEqual(["call"] * 4, traced)


def test_mmap():