# Copyright 2012 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Unittests for the cbuildbot script."""

import argparse
import builtins
import glob
import optparse  # pylint: disable=deprecated-module
import os

import pytest  # pylint: disable=import-error

from chromite.cbuildbot import cbuildbot_run
from chromite.cbuildbot import commands
from chromite.cbuildbot.builders import simple_builders
from chromite.lib import cgroups
from chromite.lib import chromeos_version
from chromite.lib import cidb
from chromite.lib import config_lib_unittest
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 parallel
from chromite.lib import partial_mock
from chromite.lib import sudo
from chromite.lib.buildstore import FakeBuildStore
from chromite.scripts import cbuildbot


# pylint: disable=protected-access


class BuilderRunMock(partial_mock.PartialMock):
    """Partial mock for BuilderRun class."""

    TARGET = "chromite.cbuildbot.cbuildbot_run._BuilderRunBase"
    ATTRS = (
        "GetVersionInfo",
        "DetermineChromeVersion",
    )

    def __init__(self, verinfo):
        super().__init__()
        self._version_info = verinfo

    def GetVersionInfo(self, _inst):
        """This way builders don't have to set the version from the overlay"""
        return self._version_info

    def DetermineChromeVersion(self, _inst):
        """Normaly this runs a portage command to look at the chrome ebuild"""
        return self._version_info.chrome_branch


class SimpleBuilderTestCase(cros_test_lib.MockTestCase):
    """Common stubs for SimpleBuilder tests."""

    CHROME_BRANCH = "27"
    VERSION = "1234.5.6"

    def setUp(self):
        verinfo = chromeos_version.VersionInfo(
            version_string=self.VERSION, chrome_branch=self.CHROME_BRANCH
        )

        self.StartPatcher(BuilderRunMock(verinfo))

        self.PatchObject(
            simple_builders.SimpleBuilder,
            "GetVersionInfo",
            return_value=verinfo,
        )


class TestArgsparseError(Exception):
    """Exception used by parser.error() mock to halt execution."""


class TestHaltedException(Exception):
    """Exception used by mocks to halt execution without indicating failure."""


class RunBuildStagesTest(
    cros_test_lib.RunCommandTempDirTestCase, SimpleBuilderTestCase
):
    """Test that cbuildbot runs the appropriate stages for a given config."""

    def setUp(self):
        self.buildroot = os.path.join(self.tempdir, "buildroot")
        osutils.SafeMakedirs(self.buildroot)
        # Always stub RunCommmand out as we use it in every method.
        self.site_config = config_lib_unittest.MockSiteConfig()
        self.build_config = config_lib_unittest.MockBuildConfig()
        self.bot_id = self.build_config.name
        self.build_config["master"] = False
        self.build_config["important"] = False
        self.buildstore = FakeBuildStore()

        # Use the cbuildbot parser to create properties and populate default values.
        self.parser = cbuildbot._CreateParser()

        argv = ["-r", self.buildroot, "--buildbot", "--debug", self.bot_id]
        self.options = cbuildbot.ParseCommandLine(self.parser, argv)
        self.options.bootstrap = False
        self.options.clean = False
        self.options.resume = False
        self.options.sync = False
        self.options.build = False
        self.options.uprev = False
        self.options.tests = False
        self.options.archive = False
        self.options.remote_test_status = False
        self.options.patches = None
        self.options.prebuilts = False

        self._manager = parallel.Manager()
        # Pylint-1.9 has a false positive on this for some reason.
        self._manager.__enter__()  # pylint: disable=no-value-for-parameter
        self.run = cbuildbot_run.BuilderRun(
            self.options, self.site_config, self.build_config, self._manager
        )

        self.rc.AddCmdResult(
            [constants.PATH_TO_CBUILDBOT, "--reexec-api-version"],
            stdout=constants.REEXEC_API_VERSION,
        )

    def tearDown(self):
        # Mimic exiting a 'with' statement.
        if hasattr(self, "_manager"):
            self._manager.__exit__(None, None, None)

    def testChromeosOfficialSet(self):
        """Verify that CHROMEOS_OFFICIAL is set correctly."""
        self.build_config["chromeos_official"] = True

        cidb.CIDBConnectionFactory.SetupNoCidb()

        # Clean up before.
        os.environ.pop("CHROMEOS_OFFICIAL", None)
        simple_builders.SimpleBuilder(self.run, self.buildstore).Run()
        self.assertIn("CHROMEOS_OFFICIAL", os.environ)

    def testChromeosOfficialNotSet(self):
        """Verify that CHROMEOS_OFFICIAL is not always set."""
        self.build_config["chromeos_official"] = False

        cidb.CIDBConnectionFactory.SetupNoCidb()

        # Clean up before.
        os.environ.pop("CHROMEOS_OFFICIAL", None)
        simple_builders.SimpleBuilder(self.run, self.buildstore).Run()
        self.assertNotIn("CHROMEOS_OFFICIAL", os.environ)


class LogTest(cros_test_lib.TempDirTestCase):
    """Test logging functionality."""

    def _generateLogs(self, num):
        """Generates cbuildbot.log and num backups."""
        with open(os.path.join(self.tempdir, "cbuildbot.log"), "w") as f:
            f.write(str(num + 1))

        for i in range(1, num + 1):
            with open(
                os.path.join(self.tempdir, "cbuildbot.log." + str(i)), "w"
            ) as f:
                f.write(str(i))

    def testZeroToOneLogs(self):
        """Test beginning corner case."""
        self._generateLogs(0)
        cbuildbot._BackupPreviousLog(
            os.path.join(self.tempdir, "cbuildbot.log"), backup_limit=25
        )
        with open(os.path.join(self.tempdir, "cbuildbot.log.1")) as f:
            self.assertEqual(f.readline(), "1")

    def testNineToTenLogs(self):
        """Test handling *.log.9 to *.log.10 (correct sorting)."""
        self._generateLogs(9)
        cbuildbot._BackupPreviousLog(
            os.path.join(self.tempdir, "cbuildbot.log"), backup_limit=25
        )
        with open(os.path.join(self.tempdir, "cbuildbot.log.10")) as f:
            self.assertEqual(f.readline(), "10")

    def testOverLimit(self):
        """Test going over the limit and having to purge old logs."""
        self._generateLogs(25)
        cbuildbot._BackupPreviousLog(
            os.path.join(self.tempdir, "cbuildbot.log"), backup_limit=25
        )
        with open(os.path.join(self.tempdir, "cbuildbot.log.26")) as f:
            self.assertEqual(f.readline(), "26")

        self.assertEqual(
            len(glob.glob(os.path.join(self.tempdir, "cbuildbot*"))), 25
        )


class InterfaceTest(cros_test_lib.MockTestCase, cros_test_lib.LoggingTestCase):
    """Test the command line interface."""

    _GENERIC_PREFLIGHT = "amd64-generic-release"
    _BUILD_ROOT = "/b/test_build1"

    def setUp(self):
        self.parser = cbuildbot._CreateParser()
        self.site_config = config_lib_unittest.MockSiteConfig()

    def assertDieSysExit(self, *args, **kwargs):
        self.assertRaises(cros_build_lib.DieSystemExit, *args, **kwargs)

    def testDepotTools(self):
        """Test that the entry point used by depot_tools works."""
        path = os.path.join(
            constants.SOURCE_ROOT, "chromite", "bin", "cbuildbot"
        )

        # Verify the tests below actually are testing correct behaviour;
        # specifically that it doesn't always just return 0.
        self.assertRaises(
            cros_build_lib.RunCommandError,
            cros_build_lib.run,
            ["cbuildbot", "--monkeys"],
            cwd=constants.SOURCE_ROOT,
        )

        # Validate depot_tools lookup.
        cros_build_lib.run(
            ["cbuildbot", "--help"],
            cwd=constants.SOURCE_ROOT,
            capture_output=True,
        )

        # Validate buildbot invocation pathway.
        cros_build_lib.run(
            [path, "--help"], cwd=constants.SOURCE_ROOT, capture_output=True
        )

    def testBuildBotOption(self):
        """Test that --buildbot option unsets debug flag."""
        args = ["-r", self._BUILD_ROOT, "--buildbot", self._GENERIC_PREFLIGHT]
        options = cbuildbot.ParseCommandLine(self.parser, args)
        self.assertFalse(options.debug)
        self.assertTrue(options.buildbot)

    def testBuildBotWithDebugOption(self):
        """Test that --debug option overrides --buildbot option."""
        args = [
            "-r",
            self._BUILD_ROOT,
            "--buildbot",
            "--debug",
            self._GENERIC_PREFLIGHT,
        ]
        options = cbuildbot.ParseCommandLine(self.parser, args)
        self.assertTrue(options.debug)
        self.assertTrue(options.buildbot)

    def testBuildBotWithRemotePatches(self):
        """Test that --buildbot errors out with patches."""
        args = [
            "-r",
            self._BUILD_ROOT,
            "--buildbot",
            "-g",
            "1234",
            self._GENERIC_PREFLIGHT,
        ]
        self.assertDieSysExit(cbuildbot.ParseCommandLine, self.parser, args)

    def testBuildbotDebugWithPatches(self):
        """Test we can test patches with --buildbot --debug."""
        args = [
            "-r",
            self._BUILD_ROOT,
            "--buildbot",
            "--debug",
            "-g",
            "1234",
            self._GENERIC_PREFLIGHT,
        ]
        cbuildbot.ParseCommandLine(self.parser, args)

    def testBuildBotWithoutProfileOption(self):
        """Test that no --profile option gets defaulted."""
        args = ["-r", self._BUILD_ROOT, "--buildbot", self._GENERIC_PREFLIGHT]
        options = cbuildbot.ParseCommandLine(self.parser, args)
        self.assertEqual(options.profile, None)

    def testBuildBotWithProfileOption(self):
        """Test that --profile option gets parsed."""
        args = [
            "-r",
            self._BUILD_ROOT,
            "--buildbot",
            "--profile",
            "carp",
            self._GENERIC_PREFLIGHT,
        ]
        options = cbuildbot.ParseCommandLine(self.parser, args)
        self.assertEqual(options.profile, "carp")

    def testValidateClobberUserDeclines_1(self):
        """Test case where user declines in prompt."""
        self.PatchObject(os.path, "exists", return_value=True)
        self.PatchObject(builtins, "input", return_value="No")
        self.assertFalse(commands.ValidateClobber(self._BUILD_ROOT))

    def testValidateClobberUserDeclines_2(self):
        """Test case where user does not enter the full 'yes' pattern."""
        self.PatchObject(os.path, "exists", return_value=True)
        m = self.PatchObject(builtins, "input", side_effect=["asdf", "No"])
        self.assertFalse(commands.ValidateClobber(self._BUILD_ROOT))
        self.assertEqual(m.call_count, 2)

    def testValidateClobberProtectRunningChromite(self):
        """User should not be clobbering our own source."""
        cwd = os.path.dirname(os.path.realpath(__file__))
        buildroot = os.path.dirname(cwd)
        self.assertDieSysExit(commands.ValidateClobber, buildroot)

    def testValidateClobberProtectRoot(self):
        """User should not be clobbering /"""
        self.assertDieSysExit(commands.ValidateClobber, "/")

    def testBuildBotWithBadChromeRevOption(self):
        """chrome_rev can't be passed an invalid option after chrome_root."""
        args = [
            "--local",
            "--buildroot=/tmp",
            "--chrome_root=.",
            "--chrome_rev=%s" % constants.CHROME_REV_TOT,
            self._GENERIC_PREFLIGHT,
        ]
        self.assertDieSysExit(cbuildbot.ParseCommandLine, self.parser, args)

    def testBuildBotWithBadChromeRootOption(self):
        """chrome_root can't get passed after non-local chrome_rev."""
        args = [
            "--buildbot",
            "--buildroot=/tmp",
            "--chrome_rev=%s" % constants.CHROME_REV_TOT,
            "--chrome_root=.",
            self._GENERIC_PREFLIGHT,
        ]
        self.assertDieSysExit(cbuildbot.ParseCommandLine, self.parser, args)

    def testBuildBotWithBadChromeRevOptionLocal(self):
        """chrome_rev can't be local without chrome_root."""
        args = [
            "--buildbot",
            "--buildroot=/tmp",
            "--chrome_rev=%s" % constants.CHROME_REV_LOCAL,
            self._GENERIC_PREFLIGHT,
        ]
        self.assertDieSysExit(cbuildbot.ParseCommandLine, self.parser, args)

    def testBuildBotWithGoodChromeRootOption(self):
        """chrome_root can be set without chrome_rev."""
        args = [
            "--buildbot",
            "--buildroot=/tmp",
            "--chrome_root=.",
            self._GENERIC_PREFLIGHT,
        ]
        options = cbuildbot.ParseCommandLine(self.parser, args)
        self.assertEqual(options.chrome_rev, constants.CHROME_REV_LOCAL)
        self.assertNotEqual(options.chrome_root, None)

    def testBuildBotWithGoodChromeRevAndRootOption(self):
        """chrome_rev can get reset around chrome_root."""
        args = [
            "--buildbot",
            "--buildroot=/tmp",
            "--chrome_rev=%s" % constants.CHROME_REV_LATEST,
            "--chrome_rev=%s" % constants.CHROME_REV_STICKY,
            "--chrome_rev=%s" % constants.CHROME_REV_TOT,
            "--chrome_rev=%s" % constants.CHROME_REV_TOT,
            "--chrome_rev=%s" % constants.CHROME_REV_STICKY,
            "--chrome_rev=%s" % constants.CHROME_REV_LATEST,
            "--chrome_rev=%s" % constants.CHROME_REV_LOCAL,
            "--chrome_root=.",
            "--chrome_rev=%s" % constants.CHROME_REV_TOT,
            "--chrome_rev=%s" % constants.CHROME_REV_LOCAL,
            self._GENERIC_PREFLIGHT,
        ]
        options = cbuildbot.ParseCommandLine(self.parser, args)
        self.assertEqual(options.chrome_rev, constants.CHROME_REV_LOCAL)
        self.assertNotEqual(options.chrome_root, None)


@pytest.mark.usefixtures("singleton_manager")
class FullInterfaceTest(cros_test_lib.MockTempDirTestCase):
    """Tests that run the cbuildbot.main() function directly.

    Note this explicitly suppresses automatic VerifyAll() calls; thus if you want
    that checked, you have to invoke it yourself.
    """

    def MakeTestRootDir(self, relpath):
        abspath = os.path.join(self.root, relpath)
        osutils.SafeMakedirs(abspath)
        return abspath

    def setUp(self):
        self.root = self.tempdir
        self.buildroot = self.MakeTestRootDir("build_root")
        self.sourceroot = self.MakeTestRootDir("source_root")

        osutils.SafeMakedirs(
            os.path.join(self.sourceroot, ".repo", "manifests")
        )
        osutils.SafeMakedirs(os.path.join(self.sourceroot, ".repo", "repo"))

        # Stub out all relevant methods regardless of whether they are called in the
        # specific test case.
        self.PatchObject(
            optparse.OptionParser, "error", side_effect=TestArgsparseError()
        )
        self.PatchObject(
            argparse.ArgumentParser, "error", side_effect=TestArgsparseError()
        )
        self.inchroot_mock = self.PatchObject(
            cros_build_lib, "IsInsideChroot", return_value=False
        )
        self.input_mock = self.PatchObject(
            builtins, "input", side_effect=Exception()
        )
        self.PatchObject(cbuildbot, "_RunBuildStagesWrapper", return_value=True)
        # Suppress cgroups code.  For cbuildbot invocation, it doesn't hugely
        # care about cgroups- that's a blackbox to it.  As such these unittests
        # should not be sensitive to it.
        self.PatchObject(cgroups.Cgroup, "IsSupported", return_value=True)
        self.PatchObject(cgroups, "SimpleContainChildren")
        self.PatchObject(
            sudo.SudoKeepAlive, "_IdentifyTTY", return_value="unknown"
        )

    def assertMain(self, args, common_options=True):
        if common_options:
            args.extend(["--sourceroot", self.sourceroot, "--notee"])
        try:
            return cbuildbot.main(args)
        finally:
            cros_build_lib.STRICT_SUDO = False

    def testNullArgsStripped(self):
        """Test that null args are stripped out and don't cause error."""
        self.assertMain(
            ["-r", self.buildroot, "", "", "amd64-generic-full-tryjob"]
        )

    def testMultipleConfigsError(self):
        """Test that multiple configs cause error."""
        with self.assertRaises(cros_build_lib.DieSystemExit):
            self.assertMain(
                [
                    "-r",
                    self.buildroot,
                    "arm-generic-full-tryjob",
                    "amd64-generic-full-tryjob",
                ]
            )

    def testBuildbotDiesInChroot(self):
        """Buildbot should quit if run inside a chroot."""
        self.inchroot_mock.return_value = True
        with self.assertRaises(cros_build_lib.DieSystemExit):
            self.assertMain(
                ["--debug", "-r", self.buildroot, "amd64-generic-full-tryjob"]
            )

    def testBuildBotOnNonCIBuilder(self):
        """Test BuildBot On Non-CIBuilder

        Buildbot should quite if run in a non-CIBuilder without
        both debug and remote.
        """
        if not cros_build_lib.HostIsCIBuilder():
            with self.assertRaises(cros_build_lib.DieSystemExit):
                self.assertMain(["--buildbot", "amd64-generic-full"])