[Findit] Add a sub-pipeline to analyze failures caused by DEPS rolls.

appengine/findit/waterfall/test/extract_deps_info_pipeline_test.py

+# 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.
+
+from pipeline_utils.appengine_third_party_pipeline_src_pipeline import handlers
+from testing_utils import testing
+
+from common import chromium_deps
+from common.dependency import Dependency
+from common.diff import ChangeType
+from waterfall.extract_deps_info_pipeline import ExtractDEPSInfoPipeline
+
+
+class ExtractDEPSInfoPipelineTest(testing.AppengineTestCase):
+  app_module = handlers._APP
+
+  def testExtractDEPSInfo(self):
+    def MockGetChromeDependency(revision, os_platform):
+      self.assertEqual('unix', os_platform)
+      if revision == 'rev2':
+        return {
+            'src/': Dependency('src/', 'https://url_src', 'rev2', 'DEPS'),
+            'src/dep1': Dependency('src/dep1', 'https://url_dep1', '9', 'DEPS'),
+        }
+      else:
+        self.assertEqual('rev2^', revision)
+        return {
+            'src/': Dependency('src/', 'https://url_src', 'rev2^', 'DEPS'),
+            'src/dep1': Dependency('src/dep1', 'https://url_dep1', '7', 'DEPS'),
+        }
+
+    self.mock(chromium_deps, 'GetChromeDependency', MockGetChromeDependency)
+
+    failure_info = {
+        'chromium_revision': 'rev2',
+        'master_name': 'chromium.linux',
+        'builder_name': 'Linux Tests',
+    }
+    change_logs = {
+        'rev2': {
+            'touched_files': [
+                {
+                    'change_type': ChangeType.MODIFY,
+                    'old_path': 'DEPS',
+                    'new_path': 'DEPS'
+                },
+            ]
+        },
+        'rev1': {
+            'touched_files': [
+                {
+                    'change_type': ChangeType.MODIFY,
+                    'old_path': 'a/file.cc',
+                    'new_path': 'a/file.cc'
+                },
+            ]
+        },
+    }
+    expected_deps_info = {
+        'deps': {
+            'src/': {
+                'repo_url': 'https://url_src',
+                'revision': 'rev2',
+            },
+            'src/dep1': {
+                'repo_url': 'https://url_dep1',
+                'revision': '9',
+            },
+        },
+        'deps_rolls': {
+            'rev2': [
+                {
+                    'path': 'src/dep1',
+                    'repo_url': 'https://url_dep1',
+                    'old_revision': '7',
+                    'new_revision': '9',
+                },
+            ]
+        }
+    }
+
+    pipeline = ExtractDEPSInfoPipeline()
+    deps_info = pipeline.run(failure_info, change_logs)
+    self.assertEqual(expected_deps_info, deps_info)