scripts/cros_generate_sysroot_unittest.py

# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Unittests for cros_generate_sysroot."""

import os
from unittest import mock

from chromite.lib import constants
from chromite.lib import cros_build_lib
from chromite.lib import cros_test_lib
from chromite.lib import osutils
from chromite.lib import partial_mock
from chromite.lib import sudo
from chromite.scripts import cros_generate_sysroot as cros_gen


Dir = cros_test_lib.Directory


class CrosGenMock(partial_mock.PartialMock):
    """Helper class to Mock out cros_generate_sysroot.GenerateSysroot."""

    TARGET = "chromite.scripts.cros_generate_sysroot.GenerateSysroot"
    ATTRS = (
        "_InstallToolchain",
        "_InstallKernelHeaders",
        "_InstallBuildDependencies",
    )

    TOOLCHAIN = "toolchain"
    KERNEL_HEADERS = "kernel_headers"
    BUILD_DEPS = "build-deps"

    def _InstallToolchain(self, inst):
        osutils.Touch(os.path.join(inst.sysroot, self.TOOLCHAIN))

    def _InstallKernelHeaders(self, inst):
        osutils.Touch(os.path.join(inst.sysroot, self.KERNEL_HEADERS))

    def _InstallBuildDependencies(self, inst):
        osutils.Touch(os.path.join(inst.sysroot, self.BUILD_DEPS))

    def VerifyTarball(self, tarball):
        dir_struct = [
            Dir(".", []),
            self.TOOLCHAIN,
            self.KERNEL_HEADERS,
            self.BUILD_DEPS,
        ]
        cros_test_lib.VerifyTarball(tarball, dir_struct)


BOARD = "lumpy"
TAR_NAME = "test.tar.xz"


class OverallTest(cros_test_lib.MockTempDirTestCase):
    """Tests for cros_generate_sysroot."""

    def setUp(self):
        self.cg_mock = self.StartPatcher(CrosGenMock())
        self.PatchObject(
            sudo.SudoKeepAlive, "_IdentifyTTY", return_value="unknown"
        )

    def testTarballGeneration(self):
        """End-to-end test of tarball generation."""
        with mock.patch.object(cros_build_lib, "IsInsideChroot"):
            cros_build_lib.IsInsideChroot.returnvalue = True
            cros_gen.main(
                [
                    "--board",
                    BOARD,
                    "--out-dir",
                    str(self.tempdir),
                    "--out-file",
                    TAR_NAME,
                    "--package",
                    constants.CHROME_CP,
                ]
            )
            self.cg_mock.VerifyTarball(os.path.join(self.tempdir, TAR_NAME))


class InterfaceTest(cros_test_lib.TempDirTestCase):
    """Test Parsing and error checking functionality."""

    BAD_TARGET_DIR = "/path/to/nowhere"

    def _Parse(self, extra_args):
        return cros_gen.ParseCommandLine(
            [
                "--board",
                BOARD,
                "--out-dir",
                str(self.tempdir),
                "--package",
                constants.CHROME_CP,
            ]
            + extra_args
        )

    def testDefaultTargetName(self):
        """We are getting the right default target name."""
        options = self._Parse([])
        self.assertEqual(
            options.out_file, "sysroot_chromeos-base_chromeos-chrome.tar.xz"
        )

    def testMultiplePkgsTargetName(self):
        """Test getting the right target name with multiple pkgs."""
        pkgs = "%s virtual/target-os" % constants.CHROME_CP
        options = cros_gen.ParseCommandLine(
            [
                "--board",
                BOARD,
                "--out-dir",
                str(self.tempdir),
                "--package",
                pkgs,
            ]
        )

        self.assertEqual(
            options.out_file, "sysroot_chromeos-base_chromeos-chrome.tar.xz"
        )

    def testExistingTarget(self):
        """Erroring out on pre-existing target."""
        options = self._Parse(["--out-file", TAR_NAME])
        osutils.Touch(os.path.join(self.tempdir, TAR_NAME))
        self.assertRaises(
            cros_build_lib.DieSystemExit, cros_gen.FinishParsing, options
        )

    def testNonExisting(self):
        """Erroring out on non-existent output dir."""
        options = cros_gen.ParseCommandLine(
            [
                "--board",
                BOARD,
                "--out-dir",
                self.BAD_TARGET_DIR,
                "--package",
                constants.CHROME_CP,
            ]
        )
        self.assertRaises(
            cros_build_lib.DieSystemExit, cros_gen.FinishParsing, options
        )