Omnibox UI Experiments: Strip trivial subdomains

components/omnibox/browser/autocomplete_match_unittest.cc

Index: components/omnibox/browser/autocomplete_match_unittest.cc
diff --git a/components/omnibox/browser/autocomplete_match_unittest.cc b/components/omnibox/browser/autocomplete_match_unittest.cc
index e6627425c16662723f27faad514eab087dfd1f2a..51cb3daf8a84118f18196758b025123af8bf60c5 100644
--- a/components/omnibox/browser/autocomplete_match_unittest.cc
+++ b/components/omnibox/browser/autocomplete_match_unittest.cc
@@ -129,17 +129,19 @@ TEST(AutocompleteMatchTest, FormatUrlForSuggestionDisplay) {
     };
   };
 
-  // Sanity check that the trim_strings parameter works.
   FormatUrlTestData normal_cases[] = {
+      // Test trim_scheme parameter without any feature flags.
       {"http://google.com", true, "google.com"},
       {"https://google.com", true, "https://google.com"},
       {"http://google.com", false, "http://google.com"},
       {"https://google.com", false, "https://google.com"},
-  };
+
+      // Verify that trivial subdomains are preserved in the normal case.
+      {"http://www.google.com", false, "http://www.google.com"}};
   for (FormatUrlTestData& test_case : normal_cases)
     test_case.Validate();
 
-  // Test the hide-scheme feature flag.
+  // Test the hide-scheme feature flag with the trim_scheme paramater.
   std::unique_ptr<base::test::ScopedFeatureList> feature_list(
       new base::test::ScopedFeatureList);
   feature_list->InitAndEnableFeature(
@@ -153,6 +155,15 @@ TEST(AutocompleteMatchTest, FormatUrlForSuggestionDisplay) {
   };
   for (FormatUrlTestData& test_case : omit_scheme_cases)
     test_case.Validate();
+
+  // Test the trim trivial subdomains feature flag.
+  feature_list.reset(new base::test::ScopedFeatureList);
+  feature_list->InitAndEnableFeature(
+      omnibox::kUIExperimentHideSuggestionUrlTrivialSubdomains);
+
+  FormatUrlTestData trim_trivial_subdomains_case = {"http://www.m.google.com",
+                                                    false, "http://google.com"};
+  trim_trivial_subdomains_case.Validate();
 }
 
 TEST(AutocompleteMatchTest, SupportsDeletion) {