Move top_20 tests to a separate suite

tools/chrome_proxy/common/chrome_proxy_metrics_unittest.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 base64
+import unittest
+
+from common import chrome_proxy_metrics as metrics
+from common import network_metrics_unittest as network_unittest
+
+
+class ChromeProxyMetricTest(unittest.TestCase):
+
+  def testChromeProxyResponse(self):
+    # An https non-proxy response.
+    resp = metrics.ChromeProxyResponse(
+        network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+            url='https://test.url',
+            response_headers={
+                'Content-Type': 'text/html',
+                'Content-Length': str(len(network_unittest.HTML_BODY)),
+                'Via': 'some other via',
+                },
+            body=network_unittest.HTML_BODY))
+    self.assertFalse(resp.ShouldHaveChromeProxyViaHeader())
+    self.assertFalse(resp.HasChromeProxyViaHeader())
+    self.assertTrue(resp.IsValidByViaHeader())
+
+    # A proxied JPEG image response
+    resp = metrics.ChromeProxyResponse(
+        network_unittest.NetworkMetricTest.MakeNetworkTimelineEvent(
+            url='http://test.image',
+            response_headers={
+                'Content-Type': 'image/jpeg',
+                'Content-Encoding': 'gzip',
+                'Via': '1.1 ' + metrics.CHROME_PROXY_VIA_HEADER,
+                'X-Original-Content-Length': str(network_unittest.IMAGE_OCL),
+                },
+            body=base64.b64encode(network_unittest.IMAGE_BODY),
+            base64_encoded_body=True))
+    self.assertTrue(resp.ShouldHaveChromeProxyViaHeader())
+    self.assertTrue(resp.HasChromeProxyViaHeader())
+    self.assertTrue(resp.IsValidByViaHeader())
+