Add git subtree daemon service.

infra/services/gsubtreed/test/gsubtreed_test_definitions.py

+# 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.
+
+from infra.libs.git2.testing_support import GitEntry
+
+GSUBTREED_TESTS = {}
+def test(f):
+  GSUBTREED_TESTS[f.__name__] = f
+  return f
+
+
+@test
+def master_mirrored_path(origin, run, checkpoint):
+  master = origin['refs/heads/master']
+  mc = master.make_commit
+  mc('first commit', {'unrelated': 'cowabunga'})
+  mc('next commit', {
+    'mirrored_path': {
+      'mirror_file': 'awesome sauce',
+      'some_other_file': 'neat',
+    },
+    'unrelated': 'other',
+    'unrelated_path': 'not helpful',
+  })
+  master.make_commit('unrelated commit', {
+    'unrelated_path': 'helpful?',
+  })
+
+  checkpoint('repo is set up')
+  run()
+  checkpoint('should see stuff')
+
+  synthed = 'refs/subtree-synthesized/mirrored_path/-/heads/master'
+  assert GitEntry.spec_for(origin, synthed) == {
+    'mirror_file': ('awesome sauce', 0644),
+    'some_other_file': ('neat', 0644),
+  }
+
+
+@test
+def multiple_refs(origin, run, checkpoint):
+  master = origin['refs/heads/master']
+  other = origin['refs/heads/other']
+  mc = master.make_commit
+  oc = other.make_commit
+
+  mc('nerd_commit', {'mirrored_path': {'sweet subfile': 'nerds'}})
+  oc('what_commit', {
+    'mirrored_path': {
+      'sweet subfile': 'what',
+      'subpath': {
+        'nested': 'data in a subdir!?'}}})
+
+  checkpoint('all set up')
+  run()
+  checkpoint('lots refs')
+
+  synthed = 'refs/subtree-synthesized/mirrored_path/subpath/-/heads/other'
+  assert GitEntry.spec_for(origin, synthed) == {
+    'nested': ('data in a subdir!?', 0644)
+  }
+
+
+@test
+def mirrored_path_is_a_file(origin, run, checkpoint):
+  master = origin['refs/heads/master']
+  mc = master.make_commit
+  mc('first commit', {'unrelated': 'cowabunga'})
+  mc('bad subtree', {'mirrored_path': 'it\'s a file!!'})
+  mc('but now it\'s OK', {'mirrored_path': {'silly': 'data'}})
+  mc('now it\'s a file again', {'mirrored_path': 'fail!'})
+  mc('back to a dir', {'mirrored_path': {'what what': 'datars!'}})
+
+  checkpoint('repo is set up')
+  run()
+  checkpoint('should see 2 commits in synthesized')
+
+  synthed = 'refs/subtree-synthesized/mirrored_path/-/heads/master'
+  assert GitEntry.spec_for(origin, synthed) == {
+    'what what': ('datars!', 0644)
+  }
+
+
+@test
+def multiple_runs(origin, run, checkpoint):
+  master = origin['refs/heads/master']
+  other = origin['refs/heads/other']
+  mc = master.make_commit
+  oc = other.make_commit
+
+  mc('nerd_commit', {'mirrored_path': {'sweet subfile': 'nerds'}})
+  oc('what_commit', {
+    'mirrored_path': {
+      'sweet subfile': 'what',
+      'subpath': {
+        'nested': 'data in a subdir!?'}}})
+
+  checkpoint('all set up')
+  run()
+  checkpoint('lots refs')
+
+  synthed = 'refs/subtree-synthesized/mirrored_path/subpath/-/heads/other'
+  assert GitEntry.spec_for(origin, synthed) == {
+    'nested': ('data in a subdir!?', 0644)
+  }
+
+  mc('new_commit', {'mirrored_path': {'whatpath': {'nested': 'datas'}}})
+  checkpoint('added new_commit')
+  run()
+  checkpoint('should gain new synthed commit')