Add regression test for the parallel jobs dependency issue.

Well, the funny thing is that it doesn't find the bug but the framework is
already good enough as-is to be worth checked-in, so the next commit can show
the relevant difference.

R=dpranke@chromium.org
BUG=60725
TEST=

Review URL: http://codereview.chromium.org/7773001

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@98869 0039d316-1c4b-4281-b951-d872f2087c98

tests/gclient_test.py

@@ -0,0 +1,167 @@
+#!/usr/bin/env python
+# Copyright (c) 2011 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.
+
+"""Unit tests for gclient.py.
+
+See gclient_smoketest.py for integration tests.
+"""
+
+import Queue
+import logging
+import os
+import sys
+import unittest
+
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+sys.path.insert(0, os.path.dirname(BASE_DIR))
+
+import gclient
+from tests import trial_dir
+
+
+def write(filename, content):
+  """Writes the content of a file and create the directories as needed."""
+  filename = os.path.abspath(filename)
+  dirname = os.path.dirname(filename)
+  if not os.path.isdir(dirname):
+    os.makedirs(dirname)
+  with open(filename, 'w') as f:
+    f.write(content)
+
+
+class SCMMock(object):
+  def __init__(self, unit_test, url):
+    self.unit_test = unit_test
+    self.url = url
+
+  def RunCommand(self, command, options, args, file_list):
+    self.unit_test.assertEquals('None', command)
+    self.unit_test.processed.put(self.url)
+
+  def FullUrlForRelativeUrl(self, url):
+    return self.url + url
+
+
+class GclientTest(trial_dir.TestCase):
+  def setUp(self):
+    super(GclientTest, self).setUp()
+    self.processed = Queue.Queue()
+    self.previous_dir = os.getcwd()
+    os.chdir(self.root_dir)
+    # Manual mocks.
+    self._old_createscm = gclient.gclient_scm.CreateSCM
+    gclient.gclient_scm.CreateSCM = self._createscm
+    self._old_sys_stdout = sys.stdout
+    sys.stdout = gclient.gclient_utils.MakeFileAutoFlush(sys.stdout)
+    sys.stdout = gclient.gclient_utils.MakeFileAnnotated(sys.stdout)
+
+  def tearDown(self):
+    self.assertEquals([], self._get_processed())
+    gclient.gclient_scm.CreateSCM = self._old_createscm
+    sys.stdout = self._old_sys_stdout
+    os.chdir(self.previous_dir)
+    super(GclientTest, self).tearDown()
+
+  def _createscm(self, parsed_url, root_dir, name):
+    self.assertTrue(parsed_url.startswith('svn://example.com/'), parsed_url)
+    self.assertTrue(root_dir.startswith(self.root_dir), root_dir)
+    return SCMMock(self, parsed_url)
+
+  def testDependencies(self):
+    self._dependencies('1', False)
+
+  def testDependenciesReverse(self):
+    self._dependencies('1', True)
+
+  def testDependenciesJobs(self):
+    self._dependencies('1000', False)
+
+  def testDependenciesJobsReverse(self):
+    self._dependencies('1000', True)
+
+  def _dependencies(self, jobs, reverse):
+    # Verify that dependencies are processed in the right order, e.g. if there
+    # is a dependency 'src' and another 'src/third_party/bar', that bar isn't
+    # fetched until 'src' is done.
+    # jobs is the number of parallel jobs simulated. reverse is to reshuffle the
+    # list to see if it is still processed in order correctly.
+    parser = gclient.Parser()
+    options, args = parser.parse_args(['--jobs', jobs])
+    write(
+        '.gclient',
+        'solutions = [\n'
+        '  { "name": "foo", "url": "svn://example.com/foo" },\n'
+        '  { "name": "bar", "url": "svn://example.com/bar" },\n'
+        ']')
+    write(
+        os.path.join('foo', 'DEPS'),
+        'deps = {\n'
+        '  "foo/dir1": "/dir1",\n'
+        '  "foo/dir1/dir2/dir3": "/dir1/dir2/dir3",\n'
+        '  "foo/dir1/dir4": "/dir1/dir4",\n'
+        '  "foo/dir1/dir2/dir3/dir4": "/dir1/dir2/dir3/dir4",\n'
+        '}')
+    write(
+        os.path.join('bar', 'DEPS'),
+        'deps = {\n'
+        '  "foo/dir1/dir2": "/dir1/dir2",\n'
+        '}')
+
+    obj = gclient.GClient.LoadCurrentConfig(options)
+    self._check_requirements(obj.dependencies[0], {})
+    self._check_requirements(obj.dependencies[1], {})
+    obj.RunOnDeps('None', args)
+    # The trick here is to manually process the list to make sure it's out of
+    # order.
+    obj.dependencies[0].dependencies.sort(key=lambda x: x.name, reverse=reverse)
+    actual = self._get_processed()
+    # We don't care of the ordering of this item.
+    actual.remove('svn://example.com/bar/dir1/dir2')
+    self.assertEquals(
+        [
+          'svn://example.com/foo',
+          'svn://example.com/bar',
+          'svn://example.com/foo/dir1',
+          'svn://example.com/foo/dir1/dir4',
+          'svn://example.com/foo/dir1/dir2/dir3',
+          'svn://example.com/foo/dir1/dir2/dir3/dir4',
+        ],
+        actual)
+    self._check_requirements(
+        obj.dependencies[0],
+        {
+          'foo/dir1': ['foo'],
+          'foo/dir1/dir2/dir3': ['foo', 'foo/dir1'],
+          'foo/dir1/dir2/dir3/dir4': ['foo', 'foo/dir1', 'foo/dir1/dir2/dir3'],
+          'foo/dir1/dir4': ['foo', 'foo/dir1'],
+        })
+    self._check_requirements(
+        obj.dependencies[1],
+        {
+          'foo/dir1/dir2': ['bar'],
+        })
+
+  def _check_requirements(self, solution, expected):
+    for dependency in solution.dependencies:
+      self.assertEquals(expected.pop(dependency.name), dependency.requirements)
+    self.assertEquals({}, expected)
+
+  def _get_processed(self):
+    items = []
+    try:
+      while True:
+        items.append(self.processed.get_nowait())
+    except Queue.Empty:
+      pass
+    return items
+
+
+if __name__ == '__main__':
+  logging.basicConfig(
+      level=[logging.ERROR, logging.WARNING, logging.INFO, logging.DEBUG][
+        min(sys.argv.count('-v'), 3)],
+      format='%(asctime).19s %(levelname)s %(filename)s:'
+              '%(lineno)s %(message)s')
+  unittest.main()