Add git subtree daemon service.

infra/services/gsubtreed/test/gsubtreed_test.py

Index: infra/services/gsubtreed/test/gsubtreed_test.py
diff --git a/infra/services/gsubtreed/test/gsubtreed_test.py b/infra/services/gsubtreed/test/gsubtreed_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..7d6fb5326f541e5089007eda1d504cbbbd42c597
--- /dev/null
+++ b/infra/services/gsubtreed/test/gsubtreed_test.py
@@ -0,0 +1,123 @@
+# Copyright 2014 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.
+
+import collections
+import json
+import logging
+import os
+import subprocess
+import sys
+import tempfile
+
+from cStringIO import StringIO
+
+import expect_tests
+
+from infra.libs.git2.testing_support import TestClock
+from infra.libs.git2.testing_support import TestRepo
+from infra.services.gsubtreed import gsubtreed
+from infra.services.gsubtreed.test import gsubtreed_test_definitions
+
+
+BASE_PATH = os.path.dirname(os.path.abspath(__file__))
+
+
+class TestConfigRef(gsubtreed.GsubtreedConfigRef):
+  def update(self, **values):
+    new_config = self.current
+    new_config.update(values)
+    self.ref.make_commit(
+        'update(%r)' % values.keys(),
+        {'config.json': json.dumps(new_config)})
+
+
+# TODO(iannucci): Make these first class data library objects

[Vadim Sh., 2014/08/17 19:37:59]

huh? what exactly?

[iannucci, 2014/08/17 22:35:30]

Oh, oops. That was from before I moved all the stuff from gnumbd_test into
testing_support.

+def RunTest(test_name):
+  ret = []
+  clock = TestClock()
+  origin = TestRepo('origin', clock)
+  local = TestRepo('local', clock, origin.repo_path)
+
+  base_repo_path = tempfile.mkdtemp()
+
+  enabled_paths = ['mirrored_path/subpath', 'mirrored_path']
+  cref = TestConfigRef(origin)
+  cref.update(enabled_paths=enabled_paths)
+
+  for path in enabled_paths:
+    full_path = os.path.join(base_repo_path, path)
+    try:
+      os.makedirs(full_path)
+    except OSError:
+      pass
+    with open(os.devnull, 'w') as dn:
+      subprocess.check_call(['git', 'init', '--bare'], cwd=full_path,
+                            stdout=dn, stderr=dn)
+
+  def checkpoint(message, include_committer=False, include_config=False):
+    osnap = origin.snap(include_committer, include_config)
+    for ref in osnap:
+      # since the subtree-processed refs are actually tags on master, don't
+      # bother showing them in their entirety
+      if 'subtree-processed' in ref:
+        if len(osnap[ref]) <= 1:
+          continue  # pragma: no cover
+        osnap[ref] = collections.OrderedDict([
+          next(osnap[ref].iteritems()),
+          ('etc', '...')
+        ])
+    ret.append([message, {'origin': osnap}])
+
+  def run():
+    stdout = sys.stdout
+    stderr = sys.stderr
+
+    logout = StringIO()
+    root_logger = logging.getLogger()
+    shandler = logging.StreamHandler(logout)
+    shandler.setFormatter(
+        logging.Formatter('%(levelname)s: %(message)s'))
+    root_logger.addHandler(shandler)
+    shandler.setLevel(logging.INFO)
+
+    success = False
+    processed = {}
+    try:
+      with open(os.devnull, 'w') as dn:
+        # TODO(iannucci): Let expect_tests absorb stdio
+        sys.stderr = sys.stdout = dn
+        local.reify()
+        success, processed = gsubtreed.inner_loop(local, cref,
+                                                  'file://' + base_repo_path)
+    except Exception:  # pragma: no cover
+      import traceback

[Vadim Sh., 2014/08/17 19:37:59]

move it to where all other imports are

[iannucci, 2014/08/17 22:35:30]

I have no idea why I did this... :/

+      ret.append(traceback.format_exc().splitlines())
+    finally:
+      sys.stdout = stdout
+      sys.stderr = stderr
+
+      root_logger.removeHandler(shandler)
+      ret.append({'log output': logout.getvalue().splitlines()})
+
+      ret.append({
+        'inner_loop success': success,
+        'processed': processed,
+      })
+
+  gsubtreed_test_definitions.GSUBTREED_TESTS[test_name](origin, run, checkpoint)
+
+  return expect_tests.Result(ret)
+
+
+@expect_tests.test_generator
+def GenTests():
+  for test_name, test in gsubtreed_test_definitions.GSUBTREED_TESTS.iteritems():
+    yield expect_tests.Test(
+        __package__ + '.' + test_name,
+        expect_tests.FuncCall(RunTest, test_name),
+        expect_base=test_name, ext='yaml', break_funcs=[test],
+        covers=(
+            expect_tests.Test.covers_obj(RunTest) +
+            expect_tests.Test.covers_obj(gsubtreed_test_definitions)
+        ))