#!/usr/bin/env python

##############################################################################
# Copyright (c) 2015 Ericsson AB and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################

# Unittest for yardstick.benchmark.scenarios.storage.fio.Fio

import mock
import unittest
import json
import os

from yardstick.benchmark.scenarios.storage import fio


@mock.patch('yardstick.benchmark.scenarios.storage.fio.ssh')
class FioTestCase(unittest.TestCase):

    def setUp(self):
        self.ctx = {
            'host': '172.16.0.137',
            'user': 'cirros',
            'key_filename': "mykey.key"
        }

    def test_fio_successful_setup(self, mock_ssh):

        p = fio.Fio(self.ctx)
        options = {
            'filename': "/home/ec2-user/data.raw",
            'bs': "4k",
            'rw': "rw",
            'ramp_time': 10
        }
        args = {'options': options}
        p.setup()

        mock_ssh.SSH().execute.return_value = (0, '', '')
        self.assertIsNotNone(p.client)
        self.assertEqual(p.setup_done, True)

    def test_fio_successful_no_sla(self, mock_ssh):

        p = fio.Fio(self.ctx)
        options = {
            'filename': "/home/ec2-user/data.raw",
            'bs': "4k",
            'rw': "rw",
            'ramp_time': 10
        }
        args = {'options': options}
        p.client = mock_ssh.SSH()

        sample_output = self._read_sample_output()
        mock_ssh.SSH().execute.return_value = (0, sample_output, '')

        result = p.run(args)

        expected_result = '{"read_bw": 83888, "read_iops": 20972,' \
            '"read_lat": 236.8, "write_bw": 84182, "write_iops": 21045,'\
            '"write_lat": 233.55}'
        expected_result = json.loads(expected_result)
        self.assertEqual(result, expected_result)

    def test_fio_unsuccessful_script_error(self, mock_ssh):

        p = fio.Fio(self.ctx)
        options = {
            'filename': "/home/ec2-user/data.raw",
            'bs': "4k",
            'rw': "rw",
            'ramp_time': 10
        }
        args = {'options': options}
        p.client = mock_ssh.SSH()

        mock_ssh.SSH().execute.return_value = (1, '', 'FOOBAR')
        self.assertRaises(RuntimeError, p.run, args)

    def _read_sample_output(self):
        curr_path = os.path.dirname(os.path.abspath(__file__))
        output = os.path.join(curr_path, 'fio_sample_output.json')
        with open(output) as f:
            sample_output = f.read()
        return sample_output

def main():
    unittest.main()

if __name__ == '__main__':
    main()