def verifyNonPresentKey(self):
        hostsFile = self.loadSampleHostsFile()
        absentKey = Key.fromString(thirdSampleKey)
        ui = FakeUI()
        l = []
        d = hostsFile.verifyHostKey(
            ui, "sample-host.example.com", "4.3.2.1", absentKey)
        d.addBoth(l.append)
        self.assertEqual([], l)
        self.assertEqual(
            ui.promptText,
            "The authenticity of host 'sample-host.example.com (4.3.2.1)' "
            "can't be established.\n"
            "RSA key fingerprint is "
            "89:4e:cc:8c:57:83:96:48:ef:63:ad:ee:99:00:4c:8f.\n"
            "Are you sure you want to continue connecting (yes/no)? ")
        return ui, l, hostsFile
Set up the test case with  a user
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/conch/test/test_knownhosts.py/KnownHostsDatabaseTests.verifyNonPresentKey--crossover with--dataset/ETHPy150Open Kitware/minerva/plugin_tests/contour_analysis_test.py/ContourAnalysesTestCase.setUp