Use the Previews Black List for server previews

chrome/browser/previews/previews_infobar_delegate_unittest.cc

 // Copyright 2016 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.
 
 #include "chrome/browser/previews/previews_infobar_delegate.h"
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/memory/ptr_util.h"
+#include "base/metrics/field_trial.h"
 #include "base/optional.h"
 #include "base/test/histogram_tester.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/android/android_theme_resources.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/loader/chrome_navigation_data.h"
 #include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h"
 #include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings_factory.h"
 #include "chrome/browser/previews/previews_infobar_tab_helper.h"
 #include "chrome/grit/generated_resources.h"
@@ skipping 265 matching lines @@
 
   auto* data_reduction_proxy_settings =
       DataReductionProxyChromeSettingsFactory::GetForBrowserContext(
           web_contents()->GetBrowserContext());
 
   EXPECT_EQ(1u, data_reduction_proxy_settings->data_reduction_proxy_service()
                     ->pingback_client()
                     ->OptOutsSizeForTesting());
 }
 
+TEST_F(PreviewsInfoBarDelegateUnitTest,
+       InfobarTestClickLinkLoFiBlackListExperiment) {

[megjablon, 2017/05/09 19:58:33]

Instead of duplicating all this code can we just add a test_cases struct to the
above test with a blacklist_experiment bool?

[RyanSturm, 2017/05/09 22:35:18]

Done.

[RyanSturm, 2017/05/10 16:01:45]

NavigateAndCommit doesn't really do the right thing wrt calling
DidFinishNavigation and the hack I tried to use didn't help, so I am leaving
these seperate.

+  base::HistogramTester tester;
+
+  base::FieldTrialList field_trial_list(nullptr);
+  base::FieldTrialList::CreateFieldTrial(
+      "DataReductionProxyPreviewsBlacklistTransition", "Enabled_");
+
+  NavigateAndCommit(GURL(kTestUrl));
+
+  ConfirmInfoBarDelegate* infobar = CreateInfoBar(
+      PreviewsInfoBarDelegate::LOFI, true /* is_data_saver_user */);
+
+  // Simulate clicking the infobar link.
+  if (infobar->LinkClicked(WindowOpenDisposition::CURRENT_TAB))
+    infobar_service()->infobar_at(0)->RemoveSelf();
+  EXPECT_EQ(0U, infobar_service()->infobar_count());
+
+  tester.ExpectBucketCount(
+      kUMAPreviewsInfoBarActionLoFi,
+      PreviewsInfoBarDelegate::INFOBAR_LOAD_ORIGINAL_CLICKED, 1);
+  EXPECT_EQ(0, drp_test_context_->pref_service()->GetInteger(
+                   data_reduction_proxy::prefs::kLoFiLoadImagesPerSession));
+  EXPECT_TRUE(user_opt_out_.value());
+
+  auto* data_reduction_proxy_settings =
+      DataReductionProxyChromeSettingsFactory::GetForBrowserContext(
+          web_contents()->GetBrowserContext());
+
+  EXPECT_EQ(1u, data_reduction_proxy_settings->data_reduction_proxy_service()
+                    ->pingback_client()
+                    ->OptOutsSizeForTesting());
+}
+
 TEST_F(PreviewsInfoBarDelegateUnitTest, InfobarTestClickLinkLitePage) {
   base::HistogramTester tester;
 
   NavigateAndCommit(GURL(kTestUrl));
 
   ConfirmInfoBarDelegate* infobar = CreateInfoBar(
       PreviewsInfoBarDelegate::LITE_PAGE, true /* is_data_saver_user */);
 
   // Simulate clicking the infobar link.
   if (infobar->LinkClicked(WindowOpenDisposition::CURRENT_TAB))
@@ skipping 209 matching lines @@
   EXPECT_EQ(1u, data_reduction_proxy_settings->data_reduction_proxy_service()
                     ->pingback_client()
                     ->OptOutsSizeForTesting());
 
   drp_test_context_->RunUntilIdle();
 
   EXPECT_EQ(0u, data_reduction_proxy_settings->data_reduction_proxy_service()
                     ->pingback_client()
                     ->OptOutsSizeForTesting());
 }