# -*- coding: utf-8 -*-
'''
    :codeauthor: :email:`Simon Dodsley <simon@purestorage.com>`
'''
# Import Python libs
from __future__ import absolute_import, print_function, unicode_literals
import errno
import textwrap

# Import Salt Testing Libs
from tests.support.unit import TestCase, skipIf
from tests.support.mock import (
    patch,
    mock_open,
    MagicMock,
    NO_MOCK,
    NO_MOCK_REASON
)

# Import Salt Libs
import salt.grains.nvme as nvme


@skipIf(NO_MOCK, NO_MOCK_REASON)
class NvmeGrainsTestCase(TestCase):
    '''
    Test cases for nvme grains
    '''

    def test_linux_nvme_nqn_grains(self):
        _nvme_file = textwrap.dedent('''\
            nqn.2014-08.org.nvmexpress:fc_lif:uuid:2cd61a74-17f9-4c22-b350-3020020c458d
            ''')

        with patch('salt.utils.files.fopen', mock_open(read_data=_nvme_file)):
            nqn = nvme._linux_nqn()

        assert isinstance(nqn, list)
        assert len(nqn) == 1
        assert nqn == ['nqn.2014-08.org.nvmexpress:fc_lif:uuid:2cd61a74-17f9-4c22-b350-3020020c458d']

    @patch('salt.utils.files.fopen', MagicMock(side_effect=IOError(errno.EPERM,
                                                                   'The cables are not the same length.')))
    @patch('salt.grains.nvme.log', MagicMock())
    def test_linux_nqn_non_root(self):
        '''
        Test if linux_nqn is running on salt-master as non-root
        and handling access denial properly.
        :return:
        '''
        assert nvme._linux_nqn() == []
        nvme.log.debug.assert_called()
        assert 'Error while accessing' in nvme.log.debug.call_args[0][0]
        assert 'cables are not the same' in nvme.log.debug.call_args[0][2].strerror
        assert nvme.log.debug.call_args[0][2].errno == errno.EPERM
        assert nvme.log.debug.call_args[0][1] == '/etc/nvme/hostnqn'

    @patch('salt.utils.files.fopen', MagicMock(side_effect=IOError(errno.ENOENT, '')))
    @patch('salt.grains.nvme.log', MagicMock())
    def test_linux_nqn_no_nvme_initiator(self):
        '''
        Test if linux_nqn is running on salt-master as root.
        nvme initiator is not there accessible or is not supported.
        :return:
        '''
        assert nvme._linux_nqn() == []
        nvme.log.debug.assert_not_called()