Python fileinput 模块，isstdin() 实例源码

def isstdin(self):
        self.invocation_counts["isstdin"] += 1
        return self.return_values["isstdin"]

def test_state_is_None(self):
        """Tests fileinput.isstdin() when fileinput._state is None.
           Ensure that it raises RuntimeError with a meaningful error message
           and does not modify fileinput._state"""
        fileinput._state = None
        with self.assertRaises(RuntimeError) as cm:
            fileinput.isstdin()
        self.assertEqual(("no active input()",), cm.exception.args)
        self.assertIsNone(fileinput._state)

def test_state_is_not_None(self):
        """Tests fileinput.isstdin() when fileinput._state is not None.
           Ensure that it invokes fileinput._state.isstdin() exactly once,
           returns whatever it returns, and does not modify fileinput._state
           to point to a different object."""
        isstdin_retval = object()
        instance = MockFileInput()
        instance.return_values["isstdin"] = isstdin_retval
        fileinput._state = instance
        retval = fileinput.isstdin()
        self.assertExactlyOneInvocation(instance, "isstdin")
        self.assertIs(retval, isstdin_retval)
        self.assertIs(fileinput._state, instance)

def isstdin(self):
        self.invocation_counts["isstdin"] += 1
        return self.return_values["isstdin"]

def test_state_is_None(self):
        """Tests fileinput.isstdin() when fileinput._state is None.
           Ensure that it raises RuntimeError with a meaningful error message
           and does not modify fileinput._state"""
        fileinput._state = None
        with self.assertRaises(RuntimeError) as cm:
            fileinput.isstdin()
        self.assertEqual(("no active input()",), cm.exception.args)
        self.assertIsNone(fileinput._state)

def test_state_is_not_None(self):
        """Tests fileinput.isstdin() when fileinput._state is not None.
           Ensure that it invokes fileinput._state.isstdin() exactly once,
           returns whatever it returns, and does not modify fileinput._state
           to point to a different object."""
        isstdin_retval = object()
        instance = MockFileInput()
        instance.return_values["isstdin"] = isstdin_retval
        fileinput._state = instance
        retval = fileinput.isstdin()
        self.assertExactlyOneInvocation(instance, "isstdin")
        self.assertIs(retval, isstdin_retval)
        self.assertIs(fileinput._state, instance)

def isstdin(self):
        self.invocation_counts["isstdin"] += 1
        return self.return_values["isstdin"]

def test_state_is_None(self):
        """Tests fileinput.isstdin() when fileinput._state is None.
           Ensure that it raises RuntimeError with a meaningful error message
           and does not modify fileinput._state"""
        fileinput._state = None
        with self.assertRaises(RuntimeError) as cm:
            fileinput.isstdin()
        self.assertEqual(("no active input()",), cm.exception.args)
        self.assertIsNone(fileinput._state)

def test_state_is_not_None(self):
        """Tests fileinput.isstdin() when fileinput._state is not None.
           Ensure that it invokes fileinput._state.isstdin() exactly once,
           returns whatever it returns, and does not modify fileinput._state
           to point to a different object."""
        isstdin_retval = object()
        instance = MockFileInput()
        instance.return_values["isstdin"] = isstdin_retval
        fileinput._state = instance
        retval = fileinput.isstdin()
        self.assertExactlyOneInvocation(instance, "isstdin")
        self.assertIs(retval, isstdin_retval)
        self.assertIs(fileinput._state, instance)