[Telemetry] Add 'check_independent' command to benchmark_runner

telemetry/telemetry/benchmark_runner_unittest.py

Index: telemetry/telemetry/benchmark_runner_unittest.py
diff --git a/telemetry/telemetry/benchmark_runner_unittest.py b/telemetry/telemetry/benchmark_runner_unittest.py
index 266f87aa17acefab2e02a6f68eeb5fd107390785..df7ad8d7661a2b8fef68f5a4f32787601d8443da 100644
--- a/telemetry/telemetry/benchmark_runner_unittest.py
+++ b/telemetry/telemetry/benchmark_runner_unittest.py
@@ -2,10 +2,13 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import os
+import sys
 import unittest
 
 from telemetry import benchmark
 from telemetry import benchmark_runner
+from telemetry import project_config
 from telemetry.testing import stream
 import mock
 
@@ -31,6 +34,28 @@ class UnusualBenchmark(benchmark.Benchmark):
     return 'I have a very unusual name'
 
 
+class BenchmarkRunnerIntegrationTests(unittest.TestCase):
+  def setUp(self):
+    top_level_dir = os.path.dirname(__file__)
+    self.config = project_config.ProjectConfig(
+        top_level_dir=top_level_dir,
+        benchmark_dirs=[os.path.join(top_level_dir, 'testdata')])
+
+  @mock.patch('sys.exit')
+  def testIndependentStoryIsIndependent(self, exit_mock):
+    with mock.patch.object(
+        sys, 'argv', ['foo', 'check_independent', 'independent']):
+      benchmark_runner.main(self.config)
+      exit_mock.assert_called_with(0)
+
+  @mock.patch('sys.exit')
+  def testDependentStoryIsDependent(self, exit_mock):
+    with mock.patch.object(
+        sys, 'argv', ['foo', 'check_independent', 'dependent']):
+      benchmark_runner.main(self.config)
+      exit_mock.assert_called_with(1)
+
+
 class BenchmarkRunnerUnittest(unittest.TestCase):
   def setUp(self):
     self._stream = stream.TestOutputStream()