Enable prefetch-search-results on Desktop Chrome by default.

chrome/browser/search/search_android_unittest.cc

Index: chrome/browser/search/search_android_unittest.cc
diff --git a/chrome/browser/search/search_android_unittest.cc b/chrome/browser/search/search_android_unittest.cc
index dcf591450e9a0a8b7c56f2a320a8013b5e60751d..04720db3ca8988bb980d9548aa01557b956ca49c 100644
--- a/chrome/browser/search/search_android_unittest.cc
+++ b/chrome/browser/search/search_android_unittest.cc
@@ -5,7 +5,11 @@
 #include "chrome/browser/search/search.h"
 
 #include "base/command_line.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/metrics/field_trial.h"
+#include "base/metrics/statistics_recorder.h"
 #include "chrome/common/chrome_switches.h"
+#include "components/variations/entropy_provider.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chrome {
@@ -21,6 +25,93 @@ TEST(SearchTest, EmbeddedSearchAPIEnabled) {
   EXPECT_TRUE(IsInstantExtendedAPIEnabled());
 }
 
+TEST(SearchTest, QueryExtractionEnabled) {
+  // Query extraction is always enabled on mobile.
+  EXPECT_TRUE(IsQueryExtractionEnabled());
+}
+
+class SearchUtilTest : public testing::Test {
+ protected:
+  virtual void SetUp() {
+    field_trial_list_.reset(new base::FieldTrialList(
+        new metrics::SHA1EntropyProvider("42")));
+    base::StatisticsRecorder::Initialize();
+  }
+
+ private:
+  scoped_ptr<base::FieldTrialList> field_trial_list_;
+};
+
+TEST_F(SearchUtilTest, UseDefaultEmbeddedSearchPageVersion) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch", "Group1 espv:-1 query_extraction:1"));
+  EXPECT_TRUE(IsQueryExtractionEnabled());
+  EXPECT_EQ("espv=1&", InstantExtendedEnabledParam(true));
+  EXPECT_EQ("espv=1&", InstantExtendedEnabledParam(false));
+}
+
+TEST_F(SearchUtilTest, ShouldPrefetchSearchResults_InstantExtendedAPIEnabled) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch",
+      "Group1 espv:2 prefetch_results:1"));
+  EXPECT_TRUE(ShouldPrefetchSearchResults());
+  EXPECT_TRUE(IsInstantExtendedAPIEnabled());
+  EXPECT_EQ(2ul, EmbeddedSearchPageVersion());
+}
+
+TEST_F(SearchUtilTest, ShouldPrefetchSearchResults_InstantExtendedAPIDisabled) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch",
+      "Group1 espv:1 prefetch_results:1"));
+  EXPECT_FALSE(ShouldPrefetchSearchResults());
+  EXPECT_FALSE(IsInstantExtendedAPIEnabled());
+  EXPECT_EQ(1ul, EmbeddedSearchPageVersion());
+}
+
+TEST_F(SearchUtilTest, ShouldPrefetchSearchResults_DisabledViaFieldTrials) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch",
+      "Group1 espv:2 prefetch_results:0"));
+  EXPECT_FALSE(ShouldPrefetchSearchResults());
+  EXPECT_EQ(2ul, EmbeddedSearchPageVersion());
+}
+
+TEST_F(SearchUtilTest, ShouldPrefetchSearchResults_EnabledViaCommandLine) {
+  CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kPrefetchSearchResults);
+  // Command-line enable should override Finch.
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch", "Group1 espv:2 prefetch_results:0"));
+  EXPECT_TRUE(ShouldPrefetchSearchResults());
+  EXPECT_EQ(2ul, EmbeddedSearchPageVersion());
+}
+
+TEST_F(SearchUtilTest,
+       ShouldReuseInstantSearchBasePage_PrefetchResultsFlagDisabled) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch",
+      "Group1 espv:2 prefetch_results:0 reuse_instant_search_base_page:1"));
+  EXPECT_FALSE(ShouldPrefetchSearchResults());
+  EXPECT_FALSE(ShouldReuseInstantSearchBasePage());
+  EXPECT_EQ(2ul, EmbeddedSearchPageVersion());
+}
+
+TEST_F(SearchUtilTest, ShouldReuseInstantSearchBasePage_EnabledViaFieldTrial) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch",
+      "Group1 espv:2 prefetch_results:1 reuse_instant_search_base_page:1"));
+  EXPECT_TRUE(ShouldReuseInstantSearchBasePage());
+  EXPECT_EQ(2ul, EmbeddedSearchPageVersion());
+}
+
+TEST_F(SearchUtilTest, ShouldReuseInstantSearchBasePage_DisabledViaFieldTrial) {
+  ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
+      "EmbeddedSearch",
+      "Group1 espv:2 prefetch_results:1 reuse_instant_search_base_page:0"));
+  EXPECT_FALSE(ShouldReuseInstantSearchBasePage());
+  EXPECT_EQ(2ul, EmbeddedSearchPageVersion());
+}
+
 }  // namespace
 
 }  // namespace chrome