#!/usr/bin/env vpython3

# Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
#
# Use of this source code is governed by a BSD-style license
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS.  All contributing project authors may
# be found in the AUTHORS file in the root of the source tree.

"""Tests for mb.py."""

import ast
import os
import re
import sys
import tempfile
import unittest

_SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
_SRC_DIR = os.path.dirname(os.path.dirname(_SCRIPT_DIR))
sys.path.insert(0, _SRC_DIR)

from tools_webrtc.mb import mb


class FakeMBW(mb.WebRTCMetaBuildWrapper):

    def __init__(self, win32=False):
        super().__init__()

        # Override vars for test portability.
        if win32:
            self.chromium_src_dir = 'c:\\fake_src'
            self.default_config = (
                'c:\\fake_src\\tools_webrtc\\mb\\mb_config.pyl')
            self.default_isolate_map = ('c:\\fake_src\\testing\\buildbot\\'
                                        'gn_isolate_map.pyl')
            self.platform = 'win32'
            self.executable = 'c:\\python\\vpython3.exe'
            self.sep = '\\'
            self.cwd = 'c:\\fake_src\\out\\Default'
        else:
            self.chromium_src_dir = '/fake_src'
            self.default_config = '/fake_src/tools_webrtc/mb/mb_config.pyl'
            self.default_isolate_map = (
                '/fake_src/testing/buildbot/gn_isolate_map.pyl')
            self.executable = '/usr/bin/vpython3'
            self.platform = 'linux2'
            self.sep = '/'
            self.cwd = '/fake_src/out/Default'

        self.files = {}
        self.dirs = set()
        self.calls = []
        self.cmds = []
        self.cross_compile = None
        self.out = ''
        self.err = ''
        self.rmdirs = []

    def ExpandUser(self, path):
        # pylint: disable=no-self-use
        return '$HOME/%s' % path

    def Exists(self, path):
        abs_path = self._AbsPath(path)
        return self.files.get(abs_path) is not None or abs_path in self.dirs

    def ListDir(self, path):
        dir_contents = []
        for f in list(self.files.keys()) + list(self.dirs):
            head, _ = os.path.split(f)
            if head == path:
                dir_contents.append(f)
        return dir_contents

    def MaybeMakeDirectory(self, path):
        abpath = self._AbsPath(path)
        self.dirs.add(abpath)

    def PathJoin(self, *comps):
        return self.sep.join(comps)

    def ReadFile(self, path):
        try:
            return self.files[self._AbsPath(path)]
        except KeyError as e:
            raise IOError('%s not found' % path) from e

    def WriteFile(self, path, contents, force_verbose=False):
        if self.args.dryrun or self.args.verbose or force_verbose:
            self.Print('\nWriting """\\\n%s""" to %s.\n' % (contents, path))
        abpath = self._AbsPath(path)
        self.files[abpath] = contents

    def Call(self, cmd, env=None, capture_output=True, input=None):
        # pylint: disable=redefined-builtin
        del env
        del capture_output
        del input
        self.calls.append(cmd)
        if self.cmds:
            return self.cmds.pop(0)
        return 0, '', ''

    def Print(self, *args, **kwargs):
        sep = kwargs.get('sep', ' ')
        end = kwargs.get('end', '\n')
        f = kwargs.get('file', sys.stdout)
        if f == sys.stderr:
            self.err += sep.join(args) + end
        else:
            self.out += sep.join(args) + end

    def TempDir(self):
        tmp_dir = os.path.join(tempfile.gettempdir(), 'mb_test')
        self.dirs.add(tmp_dir)
        return tmp_dir

    def TempFile(self, mode='w'):
        del mode
        return FakeFile(self.files)

    def RemoveFile(self, path):
        abpath = self._AbsPath(path)
        self.files[abpath] = None

    def RemoveDirectory(self, abs_path):
        # Normalize the passed-in path to handle different working directories
        # used during unit testing.
        abs_path = self._AbsPath(abs_path)
        self.rmdirs.append(abs_path)
        files_to_delete = [f for f in self.files if f.startswith(abs_path)]
        for f in files_to_delete:
            self.files[f] = None

    def _AbsPath(self, path):
        if not ((self.platform == 'win32' and path.startswith('c:')) or
                (self.platform != 'win32' and path.startswith('/'))):
            path = self.PathJoin(self.cwd, path)
        if self.sep == '\\':
            return re.sub(r'\\+', r'\\', path)
        return re.sub('/+', '/', path)


class FakeFile:
    # pylint: disable=invalid-name
    def __init__(self, files):
        self.name = '/tmp/file'
        self.buf = ''
        self.files = files

    def write(self, contents):
        self.buf += contents

    def close(self):
        self.files[self.name] = self.buf


TEST_CONFIG = """\
{
  'builder_groups': {
    'chromium': {},
    'fake_group': {
      'fake_builder': 'rel_bot',
      'fake_debug_builder': 'debug_goma',
      'fake_args_bot': 'fake_args_bot',
      'fake_multi_phase': { 'phase_1': 'phase_1', 'phase_2': 'phase_2'},
      'fake_android_bot': 'android_bot',
      'fake_args_file': 'args_file_goma',
      'fake_ios_error': 'ios_error',
    },
  },
  'configs': {
    'args_file_goma': ['fake_args_bot', 'goma'],
    'fake_args_bot': ['fake_args_bot'],
    'rel_bot': ['rel', 'goma', 'fake_feature1'],
    'debug_goma': ['debug', 'goma'],
    'phase_1': ['rel', 'phase_1'],
    'phase_2': ['rel', 'phase_2'],
    'android_bot': ['android'],
    'ios_error': ['error'],
  },
  'mixins': {
    'error': {
      'gn_args': 'error',
    },
    'fake_args_bot': {
      'args_file': '//build/args/bots/fake_group/fake_args_bot.gn',
    },
    'fake_feature1': {
      'gn_args': 'enable_doom_melon=true',
    },
    'goma': {
      'gn_args': 'use_goma=true',
    },
    'phase_1': {
      'gn_args': 'phase=1',
    },
    'phase_2': {
      'gn_args': 'phase=2',
    },
    'rel': {
      'gn_args': 'is_debug=false dcheck_always_on=false',
    },
    'debug': {
      'gn_args': 'is_debug=true',
    },
    'android': {
      'gn_args': 'target_os="android" dcheck_always_on=false',
    }
  },
}
"""


def CreateFakeMBW(files=None, win32=False):
    mbw = FakeMBW(win32=win32)
    mbw.files.setdefault(mbw.default_config, TEST_CONFIG)
    mbw.files.setdefault(
        mbw.ToAbsPath('//testing/buildbot/gn_isolate_map.pyl'), '''{
      "foo_unittests": {
        "label": "//foo:foo_unittests",
        "type": "console_test_launcher",
        "args": [],
      },
    }''')
    mbw.files.setdefault(
        mbw.ToAbsPath('//build/args/bots/fake_group/fake_args_bot.gn'),
        'is_debug = false\ndcheck_always_on=false\n')
    mbw.files.setdefault(mbw.ToAbsPath('//tools/mb/rts_banned_suites.json'),
                         '{}')
    if files:
        for path, contents in list(files.items()):
            mbw.files[path] = contents
            if path.endswith('.runtime_deps'):

                def FakeCall(cmd, env=None, capture_output=True, stdin=None):
                    # pylint: disable=cell-var-from-loop
                    del cmd
                    del env
                    del capture_output
                    del stdin
                    mbw.files[path] = contents
                    return 0, '', ''

                # pylint: disable=invalid-name
                mbw.Call = FakeCall
    return mbw


class UnitTest(unittest.TestCase):
    # pylint: disable=invalid-name
    def check(self,
              args,
              mbw=None,
              files=None,
              out=None,
              err=None,
              ret=None,
              env=None):
        if not mbw:
            mbw = CreateFakeMBW(files)

        try:
            prev_env = os.environ.copy()
            os.environ = env if env else prev_env
            actual_ret = mbw.Main(args)
        finally:
            os.environ = prev_env
        self.assertEqual(
            actual_ret, ret,
            "ret: %s, out: %s, err: %s" % (actual_ret, mbw.out, mbw.err))
        if out is not None:
            self.assertEqual(mbw.out, out)
        if err is not None:
            self.assertEqual(mbw.err, err)
        return mbw

    def test_gen_swarming(self):
        files = {
            '/tmp/swarming_targets':
            'foo_unittests\n',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl':
            ("{'foo_unittests': {"
             "  'label': '//foo:foo_unittests',"
             "  'type': 'raw',"
             "  'args': [],"
             "}}\n"),
            '/fake_src/out/Default/foo_unittests.runtime_deps':
            ("foo_unittests\n"),
        }
        mbw = CreateFakeMBW(files)
        self.check([
            'gen', '-c', 'debug_goma', '--swarming-targets-file',
            '/tmp/swarming_targets', '//out/Default'
        ],
                   mbw=mbw,
                   ret=0)
        self.assertIn('/fake_src/out/Default/foo_unittests.isolate', mbw.files)
        self.assertIn('/fake_src/out/Default/foo_unittests.isolated.gen.json',
                      mbw.files)

    def test_gen_swarming_android(self):
        test_files = {
            '/tmp/swarming_targets':
            'foo_unittests\n',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl':
            ("{'foo_unittests': {"
             "  'label': '//foo:foo_unittests',"
             "  'type': 'console_test_launcher',"
             "}}\n"),
            '/fake_src/out/Default/foo_unittests.runtime_deps':
            ("foo_unittests\n"),
        }
        mbw = self.check([
            'gen', '-c', 'android_bot', '//out/Default',
            '--swarming-targets-file', '/tmp/swarming_targets',
            '--isolate-map-file',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl'
        ],
                         files=test_files,
                         ret=0)

        isolate_file = mbw.files['/fake_src/out/Default/foo_unittests.isolate']
        isolate_file_contents = ast.literal_eval(isolate_file)
        files = isolate_file_contents['variables']['files']
        command = isolate_file_contents['variables']['command']

        self.assertEqual(
            files,
            ['../../.vpython3', '../../testing/test_env.py', 'foo_unittests'])
        self.assertEqual(command, [
            'luci-auth',
            'context',
            '--',
            'vpython3',
            '../../build/android/test_wrapper/logdog_wrapper.py',
            '--target',
            'foo_unittests',
            '--logdog-bin-cmd',
            '../../.task_template_packages/logdog_butler',
            '--logcat-output-file',
            '${ISOLATED_OUTDIR}/logcats',
            '--store-tombstones',
        ])

    def test_gen_swarming_android_test(self):
        test_files = {
            '/tmp/swarming_targets':
            'foo_unittests\n',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl':
            ("{'foo_unittests': {"
             "  'label': '//foo:foo_unittests',"
             "  'type': 'console_test_launcher',"
             "}}\n"),
            '/fake_src/out/Default/foo_unittests.runtime_deps':
            ("foo_unittests\n"),
        }
        mbw = self.check([
            'gen', '-c', 'android_bot', '//out/Default',
            '--swarming-targets-file', '/tmp/swarming_targets',
            '--isolate-map-file',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl'
        ],
                         files=test_files,
                         ret=0)

        isolate_file = mbw.files['/fake_src/out/Default/foo_unittests.isolate']
        isolate_file_contents = ast.literal_eval(isolate_file)
        files = isolate_file_contents['variables']['files']
        command = isolate_file_contents['variables']['command']

        self.assertEqual(
            files,
            ['../../.vpython3', '../../testing/test_env.py', 'foo_unittests'])
        self.assertEqual(command, [
            'luci-auth',
            'context',
            '--',
            'vpython3',
            '../../build/android/test_wrapper/logdog_wrapper.py',
            '--target',
            'foo_unittests',
            '--logdog-bin-cmd',
            '../../.task_template_packages/logdog_butler',
            '--logcat-output-file',
            '${ISOLATED_OUTDIR}/logcats',
            '--store-tombstones',
        ])

    def test_gen_raw(self):
        test_files = {
            '/tmp/swarming_targets':
            'foo_unittests\n',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl':
            ("{'foo_unittests': {"
             "  'label': '//foo:foo_unittests',"
             "  'type': 'raw',"
             "}}\n"),
            '/fake_src/out/Default/foo_unittests.runtime_deps':
            ("foo_unittests\n"),
        }
        mbw = self.check([
            'gen', '-c', 'debug_goma', '//out/Default',
            '--swarming-targets-file', '/tmp/swarming_targets',
            '--isolate-map-file',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl'
        ],
                         files=test_files,
                         ret=0)

        isolate_file = mbw.files['/fake_src/out/Default/foo_unittests.isolate']
        isolate_file_contents = ast.literal_eval(isolate_file)
        files = isolate_file_contents['variables']['files']
        command = isolate_file_contents['variables']['command']

        self.assertEqual(files, [
            '../../.vpython3',
            '../../testing/test_env.py',
            'foo_unittests',
        ])
        self.assertEqual(command, ['bin/run_foo_unittests'])

    def test_gen_non_parallel_console_test_launcher(self):
        test_files = {
            '/tmp/swarming_targets':
            'foo_unittests\n',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl':
            ("{'foo_unittests': {"
             "  'label': '//foo:foo_unittests',"
             "  'type': 'non_parallel_console_test_launcher',"
             "}}\n"),
            '/fake_src/out/Default/foo_unittests.runtime_deps':
            ("foo_unittests\n"),
        }
        mbw = self.check([
            'gen', '-c', 'debug_goma', '//out/Default',
            '--swarming-targets-file', '/tmp/swarming_targets',
            '--isolate-map-file',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl'
        ],
                         files=test_files,
                         ret=0)

        isolate_file = mbw.files['/fake_src/out/Default/foo_unittests.isolate']
        isolate_file_contents = ast.literal_eval(isolate_file)
        files = isolate_file_contents['variables']['files']
        command = isolate_file_contents['variables']['command']

        self.assertEqual(files, [
            '../../.vpython3',
            '../../testing/test_env.py',
            '../../third_party/gtest-parallel/gtest-parallel',
            '../../third_party/gtest-parallel/gtest_parallel.py',
            '../../tools_webrtc/gtest-parallel-wrapper.py',
            'foo_unittests',
        ])
        self.assertEqual(command, [
            'vpython3',
            '../../testing/test_env.py',
            '../../tools_webrtc/gtest-parallel-wrapper.py',
            '--output_dir=${ISOLATED_OUTDIR}/test_logs',
            '--gtest_color=no',
            '--workers=1',
            '--retry_failed=3',
            './foo_unittests',
            '--asan=0',
            '--lsan=0',
            '--msan=0',
            '--tsan=0',
        ])

    def test_isolate_windowed_test_launcher_linux(self):
        test_files = {
            '/tmp/swarming_targets':
            'foo_unittests\n',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl':
            ("{'foo_unittests': {"
             "  'label': '//foo:foo_unittests',"
             "  'type': 'windowed_test_launcher',"
             "}}\n"),
            '/fake_src/out/Default/foo_unittests.runtime_deps':
            ("foo_unittests\n"
             "some_resource_file\n"),
        }
        mbw = self.check([
            'gen', '-c', 'debug_goma', '//out/Default',
            '--swarming-targets-file', '/tmp/swarming_targets',
            '--isolate-map-file',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl'
        ],
                         files=test_files,
                         ret=0)

        isolate_file = mbw.files['/fake_src/out/Default/foo_unittests.isolate']
        isolate_file_contents = ast.literal_eval(isolate_file)
        files = isolate_file_contents['variables']['files']
        command = isolate_file_contents['variables']['command']

        self.assertEqual(files, [
            '../../.vpython3',
            '../../testing/test_env.py',
            '../../testing/xvfb.py',
            '../../third_party/gtest-parallel/gtest-parallel',
            '../../third_party/gtest-parallel/gtest_parallel.py',
            '../../tools_webrtc/gtest-parallel-wrapper.py',
            'foo_unittests',
            'some_resource_file',
        ])
        self.assertEqual(command, [
            'vpython3',
            '../../testing/xvfb.py',
            '../../tools_webrtc/gtest-parallel-wrapper.py',
            '--output_dir=${ISOLATED_OUTDIR}/test_logs',
            '--gtest_color=no',
            '--retry_failed=3',
            './foo_unittests',
            '--asan=0',
            '--lsan=0',
            '--msan=0',
            '--tsan=0',
        ])

    def test_gen_windowed_test_launcher_win(self):
        files = {
            'c:\\fake_src\\out\\Default\\tmp\\swarming_targets':
            'unittests\n',
            'c:\\fake_src\\testing\\buildbot\\gn_isolate_map.pyl':
            ("{'unittests': {"
             "  'label': '//somewhere:unittests',"
             "  'type': 'windowed_test_launcher',"
             "}}\n"),
            r'c:\fake_src\out\Default\unittests.exe.runtime_deps':
            ("unittests.exe\n"
             "some_dependency\n"),
        }
        mbw = CreateFakeMBW(files=files, win32=True)
        self.check([
            'gen', '-c', 'debug_goma', '--swarming-targets-file',
            'c:\\fake_src\\out\\Default\\tmp\\swarming_targets',
            '--isolate-map-file',
            'c:\\fake_src\\testing\\buildbot\\gn_isolate_map.pyl',
            '//out/Default'
        ],
                   mbw=mbw,
                   ret=0)

        isolate_file = mbw.files[
            'c:\\fake_src\\out\\Default\\unittests.isolate']
        isolate_file_contents = ast.literal_eval(isolate_file)
        files = isolate_file_contents['variables']['files']
        command = isolate_file_contents['variables']['command']

        self.assertEqual(files, [
            '../../.vpython3',
            '../../testing/test_env.py',
            '../../third_party/gtest-parallel/gtest-parallel',
            '../../third_party/gtest-parallel/gtest_parallel.py',
            '../../tools_webrtc/gtest-parallel-wrapper.py',
            'some_dependency',
            'unittests.exe',
        ])
        self.assertEqual(command, [
            'vpython3',
            '../../testing/test_env.py',
            '../../tools_webrtc/gtest-parallel-wrapper.py',
            '--output_dir=${ISOLATED_OUTDIR}/test_logs',
            '--gtest_color=no',
            '--retry_failed=3',
            r'.\unittests.exe',
            '--asan=0',
            '--lsan=0',
            '--msan=0',
            '--tsan=0',
        ])

    def test_gen_console_test_launcher(self):
        test_files = {
            '/tmp/swarming_targets':
            'foo_unittests\n',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl':
            ("{'foo_unittests': {"
             "  'label': '//foo:foo_unittests',"
             "  'type': 'console_test_launcher',"
             "}}\n"),
            '/fake_src/out/Default/foo_unittests.runtime_deps':
            ("foo_unittests\n"),
        }
        mbw = self.check([
            'gen', '-c', 'debug_goma', '//out/Default',
            '--swarming-targets-file', '/tmp/swarming_targets',
            '--isolate-map-file',
            '/fake_src/testing/buildbot/gn_isolate_map.pyl'
        ],
                         files=test_files,
                         ret=0)

        isolate_file = mbw.files['/fake_src/out/Default/foo_unittests.isolate']
        isolate_file_contents = ast.literal_eval(isolate_file)
        files = isolate_file_contents['variables']['files']
        command = isolate_file_contents['variables']['command']

        self.assertEqual(files, [
            '../../.vpython3',
            '../../testing/test_env.py',
            '../../third_party/gtest-parallel/gtest-parallel',
            '../../third_party/gtest-parallel/gtest_parallel.py',
            '../../tools_webrtc/gtest-parallel-wrapper.py',
            'foo_unittests',
        ])
        self.assertEqual(command, [
            'vpython3',
            '../../testing/test_env.py',
            '../../tools_webrtc/gtest-parallel-wrapper.py',
            '--output_dir=${ISOLATED_OUTDIR}/test_logs',
            '--gtest_color=no',
            '--retry_failed=3',
            './foo_unittests',
            '--asan=0',
            '--lsan=0',
            '--msan=0',
            '--tsan=0',
        ])

    def test_isolate(self):
        files = {
            '/fake_src/out/Default/toolchain.ninja':
            "",
            '/fake_src/testing/buildbot/gn_isolate_map.pyl':
            ("{'foo_unittests': {"
             "  'label': '//foo:foo_unittests',"
             "  'type': 'non_parallel_console_test_launcher',"
             "}}\n"),
            '/fake_src/out/Default/foo_unittests.runtime_deps':
            ("foo_unittests\n"),
        }
        self.check(
            ['isolate', '-c', 'debug_goma', '//out/Default', 'foo_unittests'],
            files=files,
            ret=0)

        # test running isolate on an existing build_dir
        files['/fake_src/out/Default/args.gn'] = 'is_debug = true\n'
        self.check(['isolate', '//out/Default', 'foo_unittests'],
                   files=files,
                   ret=0)
        files['/fake_src/out/Default/mb_type'] = 'gn\n'
        self.check(['isolate', '//out/Default', 'foo_unittests'],
                   files=files,
                   ret=0)

if __name__ == '__main__':
    unittest.main()