Introduce new basic playback test.

chrome/test/functional/media/pyauto_media.py

Index: chrome/test/functional/media/pyauto_media.py
diff --git a/chrome/test/functional/media/pyauto_media.py b/chrome/test/functional/media/pyauto_media.py
index 2a2853766c7100500d18eebd009f77341de54f79..4dd1ae6328ab485b7ae5bc7f33c1ecd65baf9cc8 100755
--- a/chrome/test/functional/media/pyauto_media.py
+++ b/chrome/test/functional/media/pyauto_media.py
@@ -10,18 +10,18 @@ test must include this snippet:
     # This should be at the top
     import pyauto_media
 
-    <test code>
+    class TestName(pyauto_media.MediaTestBase):
+      <test code>
 
     # This should be at the bottom.
     if __name__ == '__main__':
       pyauto_media.Main()
 """
-
+import json
 import os
 import sys
-import tempfile
 
-from media_test_env_names import MediaTestEnvNames
+import media_test_utils
 
 
 def _SetupPaths():
@@ -30,27 +30,36 @@ def _SetupPaths():
   sys.path.append(media_dir)
   sys.path.append(os.path.normpath(os.path.join(media_dir, os.pardir)))
 
-  # Add psutil library path.
-  # TODO(dalecurtis): This should only be added for tests which use psutil.
-  sys.path.append(os.path.normpath(os.path.join(
-      media_dir, os.pardir, os.pardir, os.pardir, os.pardir,
-      'third_party', 'psutil')))
-
-  # Setting PYTHONPATH for reference build.
-  # TODO(dalecurtis): Don't use env variables, each test can process a command
-  # line before passing off control to PyAuto.
-  if os.getenv(MediaTestEnvNames.REFERENCE_BUILD_ENV_NAME):
-    reference_build_dir = os.getenv(
-        MediaTestEnvNames.REFERENCE_BUILD_DIR_ENV_NAME,
-        # TODO(imasaki): Change the following default value.
-        # Default directory is just for testing so the correct directory
-        # must be set in the build script.
-        os.path.join(tempfile.gettempdir(), 'chrome-media-test'))
-    sys.path.insert(0, reference_build_dir)
-
 
 _SetupPaths()
+import pyauto_functional
+import pyauto
+
+
+class MediaTestBase(pyauto.PyUITest):
+  def setUp(self):
+    pyauto.PyUITest.setUp(self)
+    self._test_matrix = json.load(open(
+        os.path.join(self.DataDir(), 'media', 'csv', 'media.json')))
+
+  def FindMedia(self, **kwargs):
+    """Returns a list of matching media paths from the test matrix.
+
+    Given a list of keys like audio=True, duration=1.0, etc... returns a list
+    of files matching these constraints.
+
+    See media_test_utils.FindMediaFiles for more advanced syntax.
+
+    Arguments:
+      **kwargs: List of attributes desired for each media file.
+
+    Returns:
+      List of matching file names.
+    """
+    media_files = media_test_utils.FindMediaFiles(self._test_matrix, **kwargs)
+    # Covert unicode strings to regular strings because PyAuto doesn't know how
+    # to process unicode at the moment.
+    return map(str, media_files)
 
 
-import pyauto_functional
 Main = pyauto_functional.Main