test/py: scsi: Add test for scsi commands

Add a following test cases for scsi commands:
scsi_reset - To reset SCSI controller
scsi_info - To show available SCSI devices
scsi_scan - To (re-)scan SCSI bus
scsi_device - To show or set surrent device
scsi_part - To print partition table of selected SCSI device

Signed-off-by: Love Kumar <love.kumar@amd.com>

test/py/tests/test_scsi.py

@@ -0,0 +1,92 @@
+# SPDX-License-Identifier: GPL-2.0
+# (C) Copyright 2023, Advanced Micro Devices, Inc.
+
+import pytest
+
+"""
+Note: This test relies on boardenv_* containing configuration values to define
+the SCSI device number, type and capacity. This test will be automatically
+skipped without this.
+
+For example:
+
+# Setup env__scsi_device_test to set the SCSI device number/slot, the type of
+device, and the device capacity in MB.
+env__scsi_device_test = {
+    'dev_num': 0,
+    'device_type': 'Hard Disk',
+    'device_capacity': '476940.0 MB',
+}
+"""
+
+def scsi_setup(u_boot_console):
+    f = u_boot_console.config.env.get('env__scsi_device_test', None)
+    if not f:
+        pytest.skip('No SCSI device to test')
+
+    dev_num = f.get('dev_num', None)
+    if not isinstance(dev_num, int):
+        pytest.skip('No device number specified in env file to read')
+
+    dev_type = f.get('device_type')
+    if not dev_type:
+        pytest.skip('No device type specified in env file to read')
+
+    dev_size = f.get('device_capacity')
+    if not dev_size:
+        pytest.skip('No device capacity specified in env file to read')
+
+    return dev_num, dev_type, dev_size
+
+@pytest.mark.buildconfigspec('cmd_scsi')
+def test_scsi_reset(u_boot_console):
+    dev_num, dev_type, dev_size = scsi_setup(u_boot_console)
+    output = u_boot_console.run_command('scsi reset')
+    assert f'Device {dev_num}:' in output
+    assert f'Type: {dev_type}' in output
+    assert f'Capacity: {dev_size}' in output
+    output = u_boot_console.run_command('echo $?')
+    assert output.endswith('0')
+
+@pytest.mark.buildconfigspec('cmd_scsi')
+def test_scsi_info(u_boot_console):
+    dev_num, dev_type, dev_size = scsi_setup(u_boot_console)
+    output = u_boot_console.run_command('scsi info')
+    assert f'Device {dev_num}:' in output
+    assert f'Type: {dev_type}' in output
+    assert f'Capacity: {dev_size}' in output
+    output = u_boot_console.run_command('echo $?')
+    assert output.endswith('0')
+
+@pytest.mark.buildconfigspec('cmd_scsi')
+def test_scsi_scan(u_boot_console):
+    dev_num, dev_type, dev_size = scsi_setup(u_boot_console)
+    output = u_boot_console.run_command('scsi scan')
+    assert f'Device {dev_num}:' in output
+    assert f'Type: {dev_type}' in output
+    assert f'Capacity: {dev_size}' in output
+    output = u_boot_console.run_command('echo $?')
+    assert output.endswith('0')
+
+@pytest.mark.buildconfigspec('cmd_scsi')
+def test_scsi_dev(u_boot_console):
+    dev_num, dev_type, dev_size = scsi_setup(u_boot_console)
+    output = u_boot_console.run_command('scsi device')
+    assert 'no scsi devices available' not in output
+    assert f'device {dev_num}:' in output
+    assert f'Type: {dev_type}' in output
+    assert f'Capacity: {dev_size}' in output
+    output = u_boot_console.run_command('echo $?')
+    assert output.endswith('0')
+    output = u_boot_console.run_command('scsi device %d' % dev_num)
+    assert 'is now current device' in output
+    output = u_boot_console.run_command('echo $?')
+    assert output.endswith('0')
+
+@pytest.mark.buildconfigspec('cmd_scsi')
+def test_scsi_part(u_boot_console):
+    test_scsi_dev(u_boot_console)
+    output = u_boot_console.run_command('scsi part')
+    assert 'Partition Map for SCSI device' in output
+    output = u_boot_console.run_command('echo $?')
+    assert output.endswith('0')