[Findit] Adding test to improve code coverage

appengine/findit/waterfall/test/detect_first_failure_pipeline_test.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.
 
 import datetime
 import json
 import os
 import urllib
 import zlib
 
@@ skipping 651 matching lines @@
     }
 
     for n in xrange(223, 220, -1):
       step = WfStep.Get(master_name, builder_name, n, 'abc_test')
       self.assertIsNotNone(step)
       self.assertTrue(step.isolated)
       self.assertEqual(expected_step_log_data[n], step.log_data)
 
     self.assertEqual(expected_failed_steps, failure_info['failed_steps'])
 
+  def testRunPipelineForCompileFailure(self):
+    def _MockExtractBuildInfo(*_):
+      build_info = BuildInfo('m', 'b', 25409)
+      build_info.failed_steps = {
+          'compile': {
+              'last_pass': '25408',
+              'current_failure': '25409',
+              'first_failure': '25409'
+          }
+      }
+      return build_info
+
+    self.mock(DetectFirstFailurePipeline, '_ExtractBuildInfo',
+              _MockExtractBuildInfo)
+
+    self._CreateAndSaveWfAnanlysis('m', 'b', 25409, analysis_status.RUNNING)
+    pipeline = DetectFirstFailurePipeline()
+    failure_info = pipeline.run('m', 'b', 25409)
+
+    expected_failure_info = {
+        'failed': True,
+        'master_name': 'm',
+        'builder_name': 'b',
+        'build_number': 25409,
+        'chromium_revision': None,
+        'builds': {
+            25409: {
+                'blame_list': [],
+                'chromium_revision': None
+            }
+        },
+        'failed_steps': {
+            'compile': {
+                'current_failure': 25409,
+                'first_failure': 25409
+            }
+        },
+        'failure_type': failure_type.COMPILE
+    }
+
+    self.assertEqual(failure_info, expected_failure_info)
+
   def testGetFailureType(self):
     cases = {
         failure_type.UNKNOWN: [],
         failure_type.COMPILE: ['compile', 'slave_steps'],
         failure_type.TEST: ['browser_tests'],
     }
     for expected_type, failed_steps in cases.iteritems():
       build_info = BuildInfo('m', 'b', 123)
       build_info.failed_steps = failed_steps
       self.assertEqual(
           expected_type, DetectFirstFailurePipeline._GetFailureType(build_info))