test/py/tests/test_android/test_ab.py

# SPDX-License-Identifier: GPL-2.0
# (C) Copyright 2018 Texas Instruments, <www.ti.com>

# Test A/B update commands.

import os
import pytest
import u_boot_utils

class ABTestDiskImage(object):
    """Disk Image used by the A/B tests."""

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

        Args:
            u_boot_console: A U-Boot console.

        Returns:
            Nothing.
        """

        filename = 'test_ab_disk_image.bin'

        persistent = u_boot_console.config.persistent_data_dir + '/' + filename
        self.path = u_boot_console.config.result_dir  + '/' + filename

        with u_boot_utils.persistent_file_helper(u_boot_console.log, persistent):
            if os.path.exists(persistent):
                u_boot_console.log.action('Disk image file ' + persistent +
                    ' already exists')
            else:
                u_boot_console.log.action('Generating ' + persistent)
                fd = os.open(persistent, os.O_RDWR | os.O_CREAT)
                os.ftruncate(fd, 524288)
                os.close(fd)
                cmd = ('sgdisk', persistent)
                u_boot_utils.run_and_log(u_boot_console, cmd)

                cmd = ('sgdisk', '--new=1:64:512', '--change-name=1:misc',
                    persistent)
                u_boot_utils.run_and_log(u_boot_console, cmd)
                cmd = ('sgdisk', '--load-backup=' + persistent)
                u_boot_utils.run_and_log(u_boot_console, cmd)

        cmd = ('cp', persistent, self.path)
        u_boot_utils.run_and_log(u_boot_console, cmd)

di = None
@pytest.fixture(scope='function')
def ab_disk_image(u_boot_console):
    global di
    if not di:
        di = ABTestDiskImage(u_boot_console)
    return di

@pytest.mark.boardspec('sandbox')
@pytest.mark.buildconfigspec('android_ab')
@pytest.mark.buildconfigspec('cmd_ab_select')
@pytest.mark.requiredtool('sgdisk')
def test_ab(ab_disk_image, u_boot_console):
    """Test the 'ab_select' command."""

    u_boot_console.run_command('host bind 0 ' + ab_disk_image.path)

    output = u_boot_console.run_command('ab_select slot_name host 0#misc')
    assert 're-initializing A/B metadata' in output
    assert 'Attempting slot a, tries remaining 7' in output
    output = u_boot_console.run_command('printenv slot_name')
    assert 'slot_name=a' in output

    output = u_boot_console.run_command('ab_select slot_name host 0:1')
    assert 'Attempting slot b, tries remaining 7' in output
    output = u_boot_console.run_command('printenv slot_name')
    assert 'slot_name=b' in output