[mb] Copy MB from Chromium repo

tools/mb/mb_unittest.py

Index: tools/mb/mb_unittest.py
diff --git a/tools/mb/mb_unittest.py b/tools/mb/mb_unittest.py
new file mode 100755
index 0000000000000000000000000000000000000000..ac58c0284f986f6d1c568eb44eff672c28d6cbfe
--- /dev/null
+++ b/tools/mb/mb_unittest.py
@@ -0,0 +1,572 @@
+#!/usr/bin/python
+# Copyright 2016 the V8 project authors. All rights reserved.
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Tests for mb.py."""
+
+import json
+import StringIO
+import os
+import sys
+import unittest
+
+import mb
+
+
+class FakeMBW(mb.MetaBuildWrapper):
+  def __init__(self, win32=False):
+    super(FakeMBW, self).__init__()
+
+    # Override vars for test portability.
+    if win32:
+      self.chromium_src_dir = 'c:\\fake_src'
+      self.default_config = 'c:\\fake_src\\tools\\mb\\mb_config.pyl'
+      self.platform = 'win32'
+      self.executable = 'c:\\python\\python.exe'
+      self.sep = '\\'
+    else:
+      self.chromium_src_dir = '/fake_src'
+      self.default_config = '/fake_src/tools/mb/mb_config.pyl'
+      self.executable = '/usr/bin/python'
+      self.platform = 'linux2'
+      self.sep = '/'
+
+    self.files = {}
+    self.calls = []
+    self.cmds = []
+    self.cross_compile = None
+    self.out = ''
+    self.err = ''
+    self.rmdirs = []
+
+  def ExpandUser(self, path):
+    return '$HOME/%s' % path
+
+  def Exists(self, path):
+    return self.files.get(path) is not None
+
+  def MaybeMakeDirectory(self, path):
+    self.files[path] = True
+
+  def PathJoin(self, *comps):
+    return self.sep.join(comps)
+
+  def ReadFile(self, path):
+    return self.files[path]
+
+  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))
+    self.files[path] = contents
+
+  def Call(self, cmd, env=None, buffer_output=True):
+    if env:
+      self.cross_compile = env.get('GYP_CROSSCOMPILE')
+    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 TempFile(self, mode='w'):
+    return FakeFile(self.files)
+
+  def RemoveFile(self, path):
+    del self.files[path]
+
+  def RemoveDirectory(self, path):
+    self.rmdirs.append(path)
+    files_to_delete = [f for f in self.files if f.startswith(path)]
+    for f in files_to_delete:
+      self.files[f] = None
+
+
+class FakeFile(object):
+  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 = """\
+{
+  'masters': {
+    'chromium': {},
+    'fake_master': {
+      'fake_builder': 'gyp_rel_bot',
+      'fake_gn_builder': 'gn_rel_bot',
+      'fake_gyp_crosscompile_builder': 'gyp_crosscompile',
+      'fake_gn_debug_builder': 'gn_debug_goma',
+      'fake_gyp_builder': 'gyp_debug',
+      'fake_gn_args_bot': '//build/args/bots/fake_master/fake_gn_args_bot.gn',
+      'fake_multi_phase': ['gn_phase_1', 'gn_phase_2'],
+    },
+  },
+  'configs': {
+    'gyp_rel_bot': ['gyp', 'rel', 'goma'],
+    'gn_debug_goma': ['gn', 'debug', 'goma'],
+    'gyp_debug': ['gyp', 'debug', 'fake_feature1'],
+    'gn_rel_bot': ['gn', 'rel', 'goma'],
+    'gyp_crosscompile': ['gyp', 'crosscompile'],
+    'gn_phase_1': ['gn', 'phase_1'],
+    'gn_phase_2': ['gn', 'phase_2'],
+  },
+  'mixins': {
+    'crosscompile': {
+      'gyp_crosscompile': True,
+    },
+    'fake_feature1': {
+      'gn_args': 'enable_doom_melon=true',
+      'gyp_defines': 'doom_melon=1',
+    },
+    'gyp': {'type': 'gyp'},
+    'gn': {'type': 'gn'},
+    'goma': {
+      'gn_args': 'use_goma=true',
+      'gyp_defines': 'goma=1',
+    },
+    'phase_1': {
+      'gn_args': 'phase=1',
+      'gyp_args': 'phase=1',
+    },
+    'phase_2': {
+      'gn_args': 'phase=2',
+      'gyp_args': 'phase=2',
+    },
+    'rel': {
+      'gn_args': 'is_debug=false',
+    },
+    'debug': {
+      'gn_args': 'is_debug=true',
+    },
+  },
+}
+"""
+
+
+TEST_BAD_CONFIG = """\
+{
+  'configs': {
+    'gn_rel_bot_1': ['gn', 'rel', 'chrome_with_codecs'],
+    'gn_rel_bot_2': ['gn', 'rel', 'bad_nested_config'],
+  },
+  'masters': {
+    'chromium': {
+      'a': 'gn_rel_bot_1',
+      'b': 'gn_rel_bot_2',
+    },
+  },
+  'mixins': {
+    'gn': {'type': 'gn'},
+    'chrome_with_codecs': {
+      'gn_args': 'proprietary_codecs=true',
+    },
+    'bad_nested_config': {
+      'mixins': ['chrome_with_codecs'],
+    },
+    'rel': {
+      'gn_args': 'is_debug=false',
+    },
+  },
+}
+"""
+
+
+GYP_HACKS_CONFIG = """\
+{
+  'masters': {
+    'chromium': {},
+    'fake_master': {
+      'fake_builder': 'fake_config',
+    },
+  },
+  'configs': {
+    'fake_config': ['fake_mixin'],
+  },
+  'mixins': {
+    'fake_mixin': {
+      'type': 'gyp',
+      'gn_args': '',
+      'gyp_defines':
+         ('foo=bar llvm_force_head_revision=1 '
+          'gyp_link_concurrency=1 baz=1'),
+    },
+  },
+}
+"""
+
+
+class UnitTest(unittest.TestCase):
+  def fake_mbw(self, files=None, win32=False):
+    mbw = FakeMBW(win32=win32)
+    mbw.files.setdefault(mbw.default_config, TEST_CONFIG)
+    mbw.files.setdefault(
+        mbw.ToAbsPath('//build/args/bots/fake_master/fake_gn_args_bot.gn'),
+        'is_debug = false\n')
+    if files:
+      for path, contents in files.items():
+        mbw.files[path] = contents
+    return mbw
+
+  def check(self, args, mbw=None, files=None, out=None, err=None, ret=None):
+    if not mbw:
+      mbw = self.fake_mbw(files)
+
+    actual_ret = mbw.Main(args)
+
+    self.assertEqual(actual_ret, ret)
+    if out is not None:
+      self.assertEqual(mbw.out, out)
+    if err is not None:
+      self.assertEqual(mbw.err, err)
+    return mbw
+
+  def test_clobber(self):
+    files = {
+      '/fake_src/out/Debug': None,
+      '/fake_src/out/Debug/mb_type': None,
+    }
+    mbw = self.fake_mbw(files)
+
+    # The first time we run this, the build dir doesn't exist, so no clobber.
+    self.check(['gen', '-c', 'gn_debug_goma', '//out/Debug'], mbw=mbw, ret=0)
+    self.assertEqual(mbw.rmdirs, [])
+    self.assertEqual(mbw.files['/fake_src/out/Debug/mb_type'], 'gn')
+
+    # The second time we run this, the build dir exists and matches, so no
+    # clobber.
+    self.check(['gen', '-c', 'gn_debug_goma', '//out/Debug'], mbw=mbw, ret=0)
+    self.assertEqual(mbw.rmdirs, [])
+    self.assertEqual(mbw.files['/fake_src/out/Debug/mb_type'], 'gn')
+
+    # Now we switch build types; this should result in a clobber.
+    self.check(['gen', '-c', 'gyp_debug', '//out/Debug'], mbw=mbw, ret=0)
+    self.assertEqual(mbw.rmdirs, ['/fake_src/out/Debug'])
+    self.assertEqual(mbw.files['/fake_src/out/Debug/mb_type'], 'gyp')
+
+    # Now we delete mb_type; this checks the case where the build dir
+    # exists but wasn't populated by mb; this should also result in a clobber.
+    del mbw.files['/fake_src/out/Debug/mb_type']
+    self.check(['gen', '-c', 'gyp_debug', '//out/Debug'], mbw=mbw, ret=0)
+    self.assertEqual(mbw.rmdirs,
+                     ['/fake_src/out/Debug', '/fake_src/out/Debug'])
+    self.assertEqual(mbw.files['/fake_src/out/Debug/mb_type'], 'gyp')
+
+  def test_gn_analyze(self):
+    files = {'/tmp/in.json': """{\
+               "files": ["foo/foo_unittest.cc"],
+               "test_targets": ["foo_unittests", "bar_unittests"],
+               "additional_compile_targets": []
+             }"""}
+
+    mbw = self.fake_mbw(files)
+    mbw.Call = lambda cmd, env=None, buffer_output=True: (
+        0, 'out/Default/foo_unittests\n', '')
+
+    self.check(['analyze', '-c', 'gn_debug_goma', '//out/Default',
+                '/tmp/in.json', '/tmp/out.json'], mbw=mbw, ret=0)
+    out = json.loads(mbw.files['/tmp/out.json'])
+    self.assertEqual(out, {
+      'status': 'Found dependency',
+      'compile_targets': ['foo_unittests'],
+      'test_targets': ['foo_unittests']
+    })
+
+  def test_gn_analyze_fails(self):
+    files = {'/tmp/in.json': """{\
+               "files": ["foo/foo_unittest.cc"],
+               "test_targets": ["foo_unittests", "bar_unittests"],
+               "additional_compile_targets": []
+             }"""}
+
+    mbw = self.fake_mbw(files)
+    mbw.Call = lambda cmd, env=None, buffer_output=True: (1, '', '')
+
+    self.check(['analyze', '-c', 'gn_debug_goma', '//out/Default',
+                '/tmp/in.json', '/tmp/out.json'], mbw=mbw, ret=1)
+
+  def test_gn_analyze_all(self):
+    files = {'/tmp/in.json': """{\
+               "files": ["foo/foo_unittest.cc"],
+               "test_targets": ["bar_unittests"],
+               "additional_compile_targets": ["all"]
+             }"""}
+    mbw = self.fake_mbw(files)
+    mbw.Call = lambda cmd, env=None, buffer_output=True: (
+        0, 'out/Default/foo_unittests\n', '')
+    self.check(['analyze', '-c', 'gn_debug_goma', '//out/Default',
+                '/tmp/in.json', '/tmp/out.json'], mbw=mbw, ret=0)
+    out = json.loads(mbw.files['/tmp/out.json'])
+    self.assertEqual(out, {
+      'status': 'Found dependency (all)',
+      'compile_targets': ['all', 'bar_unittests'],
+      'test_targets': ['bar_unittests'],
+    })
+
+  def test_gn_analyze_missing_file(self):
+    files = {'/tmp/in.json': """{\
+               "files": ["foo/foo_unittest.cc"],
+               "test_targets": ["bar_unittests"],
+               "additional_compile_targets": []
+             }"""}
+    mbw = self.fake_mbw(files)
+    mbw.cmds = [
+        (0, '', ''),
+        (1, 'The input matches no targets, configs, or files\n', ''),
+        (1, 'The input matches no targets, configs, or files\n', ''),
+    ]
+
+    self.check(['analyze', '-c', 'gn_debug_goma', '//out/Default',
+                '/tmp/in.json', '/tmp/out.json'], mbw=mbw, ret=0)
+    out = json.loads(mbw.files['/tmp/out.json'])
+    self.assertEqual(out, {
+      'status': 'No dependency',
+      'compile_targets': [],
+      'test_targets': [],
+    })
+
+  def test_gn_gen(self):
+    mbw = self.fake_mbw()
+    self.check(['gen', '-c', 'gn_debug_goma', '//out/Default', '-g', '/goma'],
+               mbw=mbw, ret=0)
+    self.assertMultiLineEqual(mbw.files['/fake_src/out/Default/args.gn'],
+                              ('goma_dir = "/goma"\n'
+                               'is_debug = true\n'
+                               'use_goma = true\n'))
+
+    # Make sure we log both what is written to args.gn and the command line.
+    self.assertIn('Writing """', mbw.out)
+    self.assertIn('/fake_src/buildtools/linux64/gn gen //out/Default --check',
+                  mbw.out)
+
+    mbw = self.fake_mbw(win32=True)
+    self.check(['gen', '-c', 'gn_debug_goma', '-g', 'c:\\goma', '//out/Debug'],
+               mbw=mbw, ret=0)
+    self.assertMultiLineEqual(mbw.files['c:\\fake_src\\out\\Debug\\args.gn'],
+                              ('goma_dir = "c:\\\\goma"\n'
+                               'is_debug = true\n'
+                               'use_goma = true\n'))
+    self.assertIn('c:\\fake_src\\buildtools\\win\\gn.exe gen //out/Debug '
+                  '--check\n', mbw.out)
+
+    mbw = self.fake_mbw()
+    self.check(['gen', '-m', 'fake_master', '-b', 'fake_gn_args_bot',
+                '//out/Debug'],
+               mbw=mbw, ret=0)
+    self.assertEqual(
+        mbw.files['/fake_src/out/Debug/args.gn'],
+        'import("//build/args/bots/fake_master/fake_gn_args_bot.gn")\n')
+
+
+  def test_gn_gen_fails(self):
+    mbw = self.fake_mbw()
+    mbw.Call = lambda cmd, env=None, buffer_output=True: (1, '', '')
+    self.check(['gen', '-c', 'gn_debug_goma', '//out/Default'], mbw=mbw, ret=1)
+
+  def test_gn_gen_swarming(self):
+    files = {
+      '/tmp/swarming_targets': 'base_unittests\n',
+      '/fake_src/testing/buildbot/gn_isolate_map.pyl': (
+          "{'base_unittests': {"
+          "  'label': '//base:base_unittests',"
+          "  'type': 'raw',"
+          "  'args': [],"
+          "}}\n"
+      ),
+      '/fake_src/out/Default/base_unittests.runtime_deps': (
+          "base_unittests\n"
+      ),
+    }
+    mbw = self.fake_mbw(files)
+    self.check(['gen',
+                '-c', 'gn_debug_goma',
+                '--swarming-targets-file', '/tmp/swarming_targets',
+                '//out/Default'], mbw=mbw, ret=0)
+    self.assertIn('/fake_src/out/Default/base_unittests.isolate',
+                  mbw.files)
+    self.assertIn('/fake_src/out/Default/base_unittests.isolated.gen.json',
+                  mbw.files)
+
+  def test_gn_isolate(self):
+    files = {
+      '/fake_src/out/Default/toolchain.ninja': "",
+      '/fake_src/testing/buildbot/gn_isolate_map.pyl': (
+          "{'base_unittests': {"
+          "  'label': '//base:base_unittests',"
+          "  'type': 'raw',"
+          "  'args': [],"
+          "}}\n"
+      ),
+      '/fake_src/out/Default/base_unittests.runtime_deps': (
+          "base_unittests\n"
+      ),
+    }
+    self.check(['isolate', '-c', 'gn_debug_goma', '//out/Default',
+                'base_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', 'base_unittests'],
+               files=files, ret=0)
+
+    files['/fake_src/out/Default/mb_type'] = 'gn\n'
+    self.check(['isolate', '//out/Default', 'base_unittests'],
+               files=files, ret=0)
+
+  def test_gn_run(self):
+    files = {
+      '/fake_src/testing/buildbot/gn_isolate_map.pyl': (
+          "{'base_unittests': {"
+          "  'label': '//base:base_unittests',"
+          "  'type': 'raw',"
+          "  'args': [],"
+          "}}\n"
+      ),
+      '/fake_src/out/Default/base_unittests.runtime_deps': (
+          "base_unittests\n"
+      ),
+    }
+    self.check(['run', '-c', 'gn_debug_goma', '//out/Default',
+                'base_unittests'], files=files, ret=0)
+
+  def test_gn_lookup(self):
+    self.check(['lookup', '-c', 'gn_debug_goma'], ret=0)
+
+  def test_gn_lookup_goma_dir_expansion(self):
+    self.check(['lookup', '-c', 'gn_rel_bot', '-g', '/foo'], ret=0,
+               out=('\n'
+                    'Writing """\\\n'
+                    'goma_dir = "/foo"\n'
+                    'is_debug = false\n'
+                    'use_goma = true\n'
+                    '""" to _path_/args.gn.\n\n'
+                    '/fake_src/buildtools/linux64/gn gen _path_\n'))
+
+  def test_gyp_analyze(self):
+    mbw = self.check(['analyze', '-c', 'gyp_rel_bot', '//out/Release',
+                      '/tmp/in.json', '/tmp/out.json'], ret=0)
+    self.assertIn('analyzer', mbw.calls[0])
+
+  def test_gyp_crosscompile(self):
+    mbw = self.fake_mbw()
+    self.check(['gen', '-c', 'gyp_crosscompile', '//out/Release'],
+               mbw=mbw, ret=0)
+    self.assertTrue(mbw.cross_compile)
+
+  def test_gyp_gen(self):
+    self.check(['gen', '-c', 'gyp_rel_bot', '-g', '/goma', '//out/Release'],
+               ret=0,
+               out=("GYP_DEFINES='goma=1 gomadir=/goma'\n"
+                    "python build/gyp_chromium -G output_dir=out\n"))
+
+    mbw = self.fake_mbw(win32=True)
+    self.check(['gen', '-c', 'gyp_rel_bot', '-g', 'c:\\goma', '//out/Release'],
+               mbw=mbw, ret=0,
+               out=("set GYP_DEFINES=goma=1 gomadir='c:\\goma'\n"
+                    "python build\\gyp_chromium -G output_dir=out\n"))
+
+  def test_gyp_gen_fails(self):
+    mbw = self.fake_mbw()
+    mbw.Call = lambda cmd, env=None, buffer_output=True: (1, '', '')
+    self.check(['gen', '-c', 'gyp_rel_bot', '//out/Release'], mbw=mbw, ret=1)
+
+  def test_gyp_lookup_goma_dir_expansion(self):
+    self.check(['lookup', '-c', 'gyp_rel_bot', '-g', '/foo'], ret=0,
+               out=("GYP_DEFINES='goma=1 gomadir=/foo'\n"
+                    "python build/gyp_chromium -G output_dir=_path_\n"))
+
+  def test_help(self):
+    orig_stdout = sys.stdout
+    try:
+      sys.stdout = StringIO.StringIO()
+      self.assertRaises(SystemExit, self.check, ['-h'])
+      self.assertRaises(SystemExit, self.check, ['help'])
+      self.assertRaises(SystemExit, self.check, ['help', 'gen'])
+    finally:
+      sys.stdout = orig_stdout
+
+  def test_multiple_phases(self):
+    # Check that not passing a --phase to a multi-phase builder fails.
+    mbw = self.check(['lookup', '-m', 'fake_master', '-b', 'fake_multi_phase'],
+                     ret=1)
+    self.assertIn('Must specify a build --phase', mbw.out)
+
+    # Check that passing a --phase to a single-phase builder fails.
+    mbw = self.check(['lookup', '-m', 'fake_master', '-b', 'fake_gn_builder',
+                      '--phase', '1'],
+                     ret=1)
+    self.assertIn('Must not specify a build --phase', mbw.out)
+
+    # Check different ranges; 0 and 3 are out of bounds, 1 and 2 should work.
+    mbw = self.check(['lookup', '-m', 'fake_master', '-b', 'fake_multi_phase',
+                      '--phase', '0'], ret=1)
+    self.assertIn('Phase 0 out of bounds', mbw.out)
+
+    mbw = self.check(['lookup', '-m', 'fake_master', '-b', 'fake_multi_phase',
+                      '--phase', '1'], ret=0)
+    self.assertIn('phase = 1', mbw.out)
+
+    mbw = self.check(['lookup', '-m', 'fake_master', '-b', 'fake_multi_phase',
+                      '--phase', '2'], ret=0)
+    self.assertIn('phase = 2', mbw.out)
+
+    mbw = self.check(['lookup', '-m', 'fake_master', '-b', 'fake_multi_phase',
+                      '--phase', '3'], ret=1)
+    self.assertIn('Phase 3 out of bounds', mbw.out)
+
+  def test_validate(self):
+    mbw = self.fake_mbw()
+    self.check(['validate'], mbw=mbw, ret=0)
+
+  def test_gyp_env_hacks(self):
+    mbw = self.fake_mbw()
+    mbw.files[mbw.default_config] = GYP_HACKS_CONFIG
+    self.check(['lookup', '-c', 'fake_config'], mbw=mbw,
+               ret=0,
+               out=("GYP_DEFINES='foo=bar baz=1'\n"
+                    "GYP_LINK_CONCURRENCY=1\n"
+                    "LLVM_FORCE_HEAD_REVISION=1\n"
+                    "python build/gyp_chromium -G output_dir=_path_\n"))
+
+
+if __name__ == '__main__':
+  unittest.main()
+
+  def test_validate(self):
+    mbw = self.fake_mbw()
+    self.check(['validate'], mbw=mbw, ret=0)
+
+  def test_bad_validate(self):
+    mbw = self.fake_mbw()
+    mbw.files[mbw.default_config] = TEST_BAD_CONFIG
+    self.check(['validate'], mbw=mbw, ret=1)
+
+  def test_gyp_env_hacks(self):
+    mbw = self.fake_mbw()
+    mbw.files[mbw.default_config] = GYP_HACKS_CONFIG
+    self.check(['lookup', '-c', 'fake_config'], mbw=mbw,
+               ret=0,
+               out=("GYP_DEFINES='foo=bar baz=1'\n"
+                    "GYP_LINK_CONCURRENCY=1\n"
+                    "LLVM_FORCE_HEAD_REVISION=1\n"
+                    "python build/gyp_chromium -G output_dir=_path_\n"))
+
+
+if __name__ == '__main__':
+  unittest.main()