[U-Boot] [PATCH v2 5/7] test/py: Add base test case for A/B updates

[Ruslan Trofymenko]

Add sandbox test for 'ab_select' command.

Test: ./test/py/test.py --bd sandbox --build -k test_ab

Signed-off-by: Ruslan Trofymenko <ruslan.trofymenko at linaro.org>
Reviewed-by: Alistair Strachan <astrachan at google.com>
Reviewed-by: Sam Protsenko <semen.protsenko at linaro.org>
---
Changes in v2:
  * Сhanges related to command renaming
  * Assertion condition was clarified. Full command output is controlled.

 configs/sandbox_defconfig |  2 ++
 test/py/tests/test_ab.py  | 74 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 test/py/tests/test_ab.py

diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 5b65c61..b6a642e 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -21,6 +21,7 @@ CONFIG_PRE_CON_BUF_ADDR=0x100000
 CONFIG_LOG_MAX_LEVEL=6
 CONFIG_LOG_ERROR_RETURN=y
 CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_ANDROID_AB=y
 CONFIG_CMD_CPU=y
 CONFIG_CMD_LICENSE=y
 CONFIG_CMD_BOOTZ=y
@@ -49,6 +50,7 @@ CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_AXI=y
+CONFIG_CMD_AB_SELECT=y
 CONFIG_CMD_TFTPPUT=y
 CONFIG_CMD_TFTPSRV=y
 CONFIG_CMD_RARP=y
diff --git a/test/py/tests/test_ab.py b/test/py/tests/test_ab.py
new file mode 100644
index 0000000..b90ca87
--- /dev/null
+++ b/test/py/tests/test_ab.py
@@ -0,0 +1,74 @@
+# 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', '-c 1:misc', persistent)
+                u_boot_utils.run_and_log(u_boot_console, cmd)
+                cmd = ('sgdisk', '-l', 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
+ at pytest.fixture(scope='function')
+def ab_disk_image(u_boot_console):
+    global di
+    if not di:
+        di = ABTestDiskImage(u_boot_console)
+    return di
+
+ at pytest.mark.boardspec('sandbox')
+ at pytest.mark.buildconfigspec('android_ab')
+ at pytest.mark.buildconfigspec('cmd_ab_select')
+ at 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
-- 
2.7.4