def testSetFlushConsole(self):
        flush = {'count': 0}
        def f():
            flush['count'] = flush['count'] + 1

        rinterface.set_flushconsole(f)
        self.assertEquals(rinterface.get_flushconsole(), f)
        rinterface.baseenv.get("flush.console")()
        self.assertEquals(1, flush['count'])
        rinterface.set_writeconsole(rinterface.consoleFlush)
    def testFlushConsoleWithError(self):
        def f(prompt):
            raise Exception("Doesn't work.")
        rinterface.set_flushconsole(f)

        tmp_file = tempfile.NamedTemporaryFile()
        stderr = sys.stderr
        sys.stderr = tmp_file
        try:
            res = rinterface.baseenv.get("flush.console")()
        except Exception, e:
            sys.stderr = stderr
            raise e