Prerender: Hardcode the Silence experiment date

chrome/browser/prerender/prerender_unittest.cc

Index: chrome/browser/prerender/prerender_unittest.cc
diff --git a/chrome/browser/prerender/prerender_unittest.cc b/chrome/browser/prerender/prerender_unittest.cc
index 68d6c5bbddbb4f1c7dbcc19977ddbac1ab8352a3..5a197314b43c2902d3e6e071f5d51e3e1cc50937 100644
--- a/chrome/browser/prerender/prerender_unittest.cc
+++ b/chrome/browser/prerender/prerender_unittest.cc
@@ -97,6 +97,17 @@ const gfx::Size kSize(640, 480);
 
 const uint32_t kDefaultRelTypes = PrerenderRelTypePrerender;
 
+const Origin g_prerender_silence_origins[] = {
+    ORIGIN_GWS_PRERENDER,
+    ORIGIN_OMNIBOX,
+    ORIGIN_NONE,
+    ORIGIN_LINK_REL_PRERENDER_SAMEDOMAIN,
+    ORIGIN_LINK_REL_PRERENDER_CROSSDOMAIN,
+    ORIGIN_EXTERNAL_REQUEST,
+    ORIGIN_INSTANT,
+    ORIGIN_LINK_REL_NEXT,
+};
+
 base::SimpleTestTickClock* OverridePrerenderManagerTimeTicks(
     PrerenderManager* prerender_manager) {
   auto tick_clock = base::MakeUnique<base::SimpleTestTickClock>();
@@ -1134,29 +1145,59 @@ TEST_F(PrerenderTest, PrerenderSilenceAllowsOffline) {
   EXPECT_EQ(ORIGIN_OFFLINE, prerender_handle->contents()->origin());
 }
 
+// Checks that the "PrerenderSilence experiment does not disable forced-cellular
+// prerendering.
+TEST_F(PrerenderTest, PrerenderSilenceAllowsForcedCellular) {
+  // Set the time to 30 seconds before the experiment expires.
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "PrerenderSilence", "ExperimentYes_expires_2016-12-20T00:01:00Z"));
+  ASSERT_TRUE(OverridePrerenderManagerTime("2016-12-20T00:00:30Z",
+                                           prerender_manager()));
+  GURL url("http://www.google.com/");
+  DummyPrerenderContents* prerender_contents =
+      prerender_manager()->CreateNextPrerenderContents(
+          url, ORIGIN_EXTERNAL_REQUEST_FORCED_CELLULAR,
+          FINAL_STATUS_MANAGER_SHUTDOWN);
+  std::unique_ptr<PrerenderHandle> prerender_handle =
+      prerender_manager()->AddPrerenderOnCellularFromExternalRequest(
+          url, content::Referrer(), nullptr, gfx::Rect(kSize));
+  EXPECT_TRUE(prerender_handle);
+  EXPECT_TRUE(prerender_handle->IsPrerendering());
+  EXPECT_TRUE(prerender_contents->prerendering_has_started());
+  EXPECT_EQ(prerender_contents, prerender_handle->contents());
+  EXPECT_EQ(ORIGIN_EXTERNAL_REQUEST_FORCED_CELLULAR,
+            prerender_handle->contents()->origin());
+}
+
 // Checks that the "PrerenderSilence" experiment disables prerendering.
 TEST_F(PrerenderTest, PrerenderSilenceDisallowsNonOffline) {
   ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
       "PrerenderSilence", "ExperimentYes_expires_2016-12-20T00:02:00Z"));
   ASSERT_TRUE(OverridePrerenderManagerTime("2016-12-20T00:01:00Z",
                                            prerender_manager()));
-  const Origin origins[] = {
-      ORIGIN_GWS_PRERENDER,
-      ORIGIN_OMNIBOX,
-      ORIGIN_NONE,
-      ORIGIN_LINK_REL_PRERENDER_SAMEDOMAIN,
-      ORIGIN_LINK_REL_PRERENDER_CROSSDOMAIN,
-      ORIGIN_EXTERNAL_REQUEST,
-      ORIGIN_INSTANT,
-      ORIGIN_LINK_REL_NEXT,
-      ORIGIN_EXTERNAL_REQUEST_FORCED_CELLULAR,
-  };
-  for (const Origin& origin : origins) {
+  for (const Origin& origin : g_prerender_silence_origins) {
     EXPECT_TRUE(
         prerender_manager()->IsPrerenderSilenceExperimentForTesting(origin));
   }
 }
 
+// Checks that the "PrerenderSilence" experiment disables prerendering even
+// without the field trial, then expires.
+TEST_F(PrerenderTest, PrerenderSilenceWithoutFieldTrial) {
+  ASSERT_TRUE(OverridePrerenderManagerTime("2016-12-14T08:00:01Z",
+                                           prerender_manager()));
+  for (const Origin& origin : g_prerender_silence_origins) {
+    EXPECT_TRUE(
+        prerender_manager()->IsPrerenderSilenceExperimentForTesting(origin));
+  }
+  ASSERT_TRUE(OverridePrerenderManagerTime("2016-12-15T08:00:00Z",
+                                           prerender_manager()));
+  for (const Origin& origin : g_prerender_silence_origins) {
+    EXPECT_FALSE(
+        prerender_manager()->IsPrerenderSilenceExperimentForTesting(origin));
+  }
+}
+
 // Checks that prerendering is enabled after expiration of the
 // "PrerenderSilence" experiment.
 TEST_F(PrerenderTest, PrerenderSilenceAllowsAfterExpiration) {