Telemetry: add a metadata layer between page set and .wpr.

tools/telemetry/telemetry/page_set_unittest.py

Index: tools/telemetry/telemetry/page_set_unittest.py
diff --git a/tools/telemetry/telemetry/page_set_unittest.py b/tools/telemetry/telemetry/page_set_unittest.py
index ef1a83c7302c12093c8f553e8df8c683459c4053..bdcdefe60db9baa3adf7bba3bde4376799bb0afa 100644
--- a/tools/telemetry/telemetry/page_set_unittest.py
+++ b/tools/telemetry/telemetry/page_set_unittest.py
@@ -1,16 +1,27 @@
 # Copyright (c) 2012 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 os
 import tempfile
 import unittest
 
 from telemetry import page_set
 
+simple_archive_info = """
+{
+"archives": {
+  "data_01.wpr": ["http://www.foo.com/"],
+  "data_02.wpr": ["http://www.bar.com/"]
+}
+}
+"""
+
 simple_set = """
 {"description": "hello",
- "archive_path": "foo.wpr",
+ "archive_data_file": "%s",
  "pages": [
-   {"url": "http://www.foo.com/"}
+   {"url": "http://www.foo.com/"},
+   {"url": "http://www.bar.com/"}
  ]
 }
 """
@@ -18,11 +29,19 @@ simple_set = """
 class TestPageSet(unittest.TestCase):
   def testSimpleSet(self):
     with tempfile.NamedTemporaryFile() as f:
-      f.write(simple_set)
+      f.write(simple_archive_info)
       f.flush()
-      ps = page_set.PageSet.FromFile(f.name)
+      archive_data_file = f.name
+
+      with tempfile.NamedTemporaryFile() as f2:
+        f2.write(simple_set % archive_data_file)
+        f2.flush()
+        ps = page_set.PageSet.FromFile(f2.name)
 
     self.assertEquals('hello', ps.description)
-    self.assertEquals('foo.wpr', ps.archive_path)
-    self.assertEquals(1, len(ps.pages))
+    self.assertEquals(archive_data_file, ps.archive_data_file)
+    self.assertEquals(2, len(ps.pages))
     self.assertEquals('http://www.foo.com/', ps.pages[0].url)
+    self.assertEquals('http://www.bar.com/', ps.pages[1].url)
+    self.assertEquals('data_01.wpr', os.path.basename(ps.pages[0].archive_path))
+    self.assertEquals('data_02.wpr', os.path.basename(ps.pages[1].archive_path))