Create an apptesting framework for dart.

mojo/tools/mopy/dart_apptest.py

Index: mojo/tools/mopy/dart_apptest.py
diff --git a/mojo/tools/mopy/dart_apptest.py b/mojo/tools/mopy/dart_apptest.py
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+++ b/mojo/tools/mopy/dart_apptest.py
@@ -0,0 +1,42 @@
+# 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 logging
+
+_logging = logging.getLogger()
+
+from mopy import test_util
+from mopy.print_process_error import print_process_error
+
+
+# TODO(erg): Support android, launched services and fixture isolation.
+def run_test(config, apptest_dict, shell_args, apps_and_args=None,
+             run_launcher=False):
+  """Runs a command line and checks the output for signs of gtest failure.
+
+  Args:
+    config: The mopy.config.Config object for the build.
+    shell_args: The arguments for mojo_shell.
+    apps_and_args: A Dict keyed by application URL associated to the
+        application's specific arguments.
+    run_launcher: |True| is mojo_launcher must be used instead of mojo_shell.
+  """
+  apps_and_args = apps_and_args or {}
+  output = test_util.try_run_test(config, shell_args, apps_and_args,
+                                  run_launcher)
+  # Fail on output with dart unittests' "FAIL:" or a lack of "PASS:".
+  # The latter condition ensures failure on broken command lines or output.
+  # Check output instead of exit codes because mojo_shell always exits with 0.
+  if (output is None or
+      output.find("FAIL:") != -1 or
+      output.find("PASS:") == -1):
+    print "Failed test:"
+    print_process_error(
+        test_util.build_command_line(config, shell_args, apps_and_args,
+                                     run_launcher),
+        output)
+    return "Failed test(s) in %r" % apptest_dict
+  _logging.debug("Succeeded with output:\n%s" % output)
+  return "Succeeded"
+