test_gpt.py

# Copyright (c) 2017 Alison Chaiken
# Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0

# Test GPT manipulation commands.

import os
import pytest
import u_boot_utils

"""
These tests rely on a 4 MB disk image, which is automatically created by
the test.
"""

class GptTestDiskImage(object):
    """Disk Image used by the GPT tests."""

    def __init__(self, u_boot_console):
        """Initialize a new GptTestDiskImage object.

        Args:
            u_boot_console: A U-Boot console.

        Returns:
            Nothing.
        """

        filename = 'test_gpt_disk_image.bin'
        self.path = u_boot_console.config.persistent_data_dir + '/' + filename

        if os.path.exists(self.path):
            u_boot_console.log.action('Disk image file ' + self.path +
                ' already exists')
        else:
            u_boot_console.log.action('Generating ' + self.path)
            fd = os.open(self.path, os.O_RDWR | os.O_CREAT)
            os.ftruncate(fd, 4194304)
            os.close(fd)
            sgdisk = '/sbin/sgdisk'
            cmd = (sgdisk, '-U', '375a56f7-d6c9-4e81-b5f0-09d41ca89efe',
                self.path)
            u_boot_utils.run_and_log(u_boot_console, cmd)
            cmd = (sgdisk, '--new=1:2048:2560', self.path)
            u_boot_utils.run_and_log(u_boot_console, cmd)
            cmd = (sgdisk, '--new=2:4096:4608', self.path)
            u_boot_utils.run_and_log(u_boot_console, cmd)
            cmd = (sgdisk, '-l', self.path)
            u_boot_utils.run_and_log(u_boot_console, cmd)

gtdi = None
@pytest.fixture(scope='function')
def state_disk_image(u_boot_console):
    """pytest fixture to provide a GptTestDiskImage object to tests.
    This is function-scoped because it uses u_boot_console, which is also
    function-scoped. However, we don't need to actually do any function-scope
    work, so this simply returns the same object over and over each time."""

    global gtdi
    if not gtdi:
        gtdi = GptTestDiskImage(u_boot_console)
    return gtdi

@pytest.mark.boardspec('sandbox')
@pytest.mark.buildconfigspec('cmd_gpt')
def test_gpt_guid(state_disk_image, u_boot_console):
    """Test the gpt guid command."""

    u_boot_console.run_command('host bind 0 ' + state_disk_image.path)
    output = u_boot_console.run_command('gpt guid host 0')
    assert '375a56f7-d6c9-4e81-b5f0-09d41ca89efe' in output

@pytest.mark.boardspec('sandbox')
@pytest.mark.buildconfigspec('cmd_gpt')
def test_gpt_save_guid(state_disk_image, u_boot_console):
    """Test the gpt guid command to save GUID into a string."""

    if u_boot_console.config.buildconfig.get('config_cmd_gpt', 'n') != 'y':
        pytest.skip('gpt command not supported')
    u_boot_console.run_command('host bind 0 ' + state_disk_image.path)
    output = u_boot_console.run_command('gpt guid host 0 newguid')
    output = u_boot_console.run_command('printenv newguid')
    assert '375a56f7-d6c9-4e81-b5f0-09d41ca89efe' in output

@pytest.mark.boardspec('sandbox')
@pytest.mark.buildconfigspec('cmd_gpt')
@pytest.mark.buildconfigspec('cmd_gpt_rename')
def test_gpt_rename_partition(state_disk_image, u_boot_console):
    """Test the gpt rename command to write partition names."""

    u_boot_console.run_command('host bind 0 ' + state_disk_image.path)
    u_boot_console.run_command('gpt rename host 0 1 first')
    output = u_boot_console.run_command('gpt read host 0')
    assert 'name first' in output
    u_boot_console.run_command('gpt rename host 0 2 second')
    output = u_boot_console.run_command('gpt read host 0')
    assert 'name second' in output

@pytest.mark.boardspec('sandbox')
@pytest.mark.buildconfigspec('cmd_gpt')
@pytest.mark.buildconfigspec('cmd_gpt_rename')
@pytest.mark.buildconfigspec('cmd_part')
def test_gpt_swap_partitions(state_disk_image, u_boot_console):
    """Test the gpt swap command to exchange two partition names."""

    u_boot_console.run_command('host bind 0 ' + state_disk_image.path)
    output = u_boot_console.run_command('part list host 0')
    assert '0x000007ff	"first"' in output
    assert '0x000017ff	"second"' in output
    u_boot_console.run_command('gpt swap host 0 first second')
    output = u_boot_console.run_command('part list host 0')
    assert '0x000007ff	"second"' in output
    assert '0x000017ff	"first"' in output