import subprocess
import os

import infra.basetest


class TestUbi(infra.basetest.BRTest):
    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
        """
        BR2_TARGET_ROOTFS_UBIFS=y
        BR2_TARGET_ROOTFS_UBIFS_LEBSIZE=0x7ff80
        BR2_TARGET_ROOTFS_UBIFS_MINIOSIZE=0x1
        BR2_TARGET_ROOTFS_UBI=y
        BR2_TARGET_ROOTFS_UBI_PEBSIZE=0x80000
        BR2_TARGET_ROOTFS_UBI_SUBSIZE=1
        """

    # TODO: if you boot Qemu twice on the same UBI image, it fails to
    # attach the image the second time, with "ubi0 error:
    # ubi_read_volume_table: the layout volume was not found".
    # To be investigated.
    def test_run(self):
        img = os.path.join(self.builddir, "images", "rootfs.ubi")
        out = subprocess.check_output(["file", img],
                                      cwd=self.builddir,
                                      env={"LANG": "C"})
        out = out.splitlines()

        subprocess.call(["truncate", "-s 128M", img])

        self.emulator.boot(arch="armv7",
                           kernel="builtin",
                           kernel_cmdline=["root=ubi0:rootfs",
                                           "ubi.mtd=0",
                                           "rootfstype=ubifs"],
                           options=["-drive", "file={},if=pflash".format(img)])
        self.emulator.login()
        cmd = "mount | grep 'ubi0:rootfs on / type ubifs'"
        _, exit_code = self.emulator.run(cmd)
        self.assertEqual(exit_code, 0)