Assume all providers may give zero suggest responses.

chrome/browser/autocomplete/history_url_provider_unittest.cc

 // Copyright (c) 2012 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/autocomplete/history_url_provider.h"
 
 #include <algorithm>
 
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
@@ skipping 292 matching lines @@
     const std::string& desired_tld,
     bool prevent_inline_autocomplete,
     const UrlAndLegalDefault* expected_urls,
     size_t num_results,
     metrics::OmniboxInputType::Type* identified_input_type) {
   AutocompleteInput input(text, base::string16::npos, desired_tld, GURL(),
                           metrics::OmniboxEventProto::INVALID_SPEC,
                           prevent_inline_autocomplete, false, true, true,
                           ChromeAutocompleteSchemeClassifier(profile_.get()));
   *identified_input_type = input.type();
-  autocomplete_->Start(input, false);
+  autocomplete_->Start(input, false, false);
   if (!autocomplete_->done())
     base::MessageLoop::current()->Run();
 
   matches_ = autocomplete_->matches();
   if (sort_matches_) {
     TemplateURLService* service =
         TemplateURLServiceFactory::GetForProfile(profile_.get());
     for (ACMatches::iterator i = matches_.begin(); i != matches_.end(); ++i)
       i->ComputeStrippedDestinationURL(service);
     AutocompleteResult::DedupMatchesByDestination(
@@ skipping 279 matching lines @@
 // second passes.
 TEST_F(HistoryURLProviderTest, EmptyVisits) {
   // Wait for history to create the in memory DB.
   profile_->BlockUntilHistoryProcessesPendingRequests();
 
   AutocompleteInput input(ASCIIToUTF16("p"), base::string16::npos,
                           std::string(), GURL(),
                           metrics::OmniboxEventProto::INVALID_SPEC, false,
                           false, true, true,
                           ChromeAutocompleteSchemeClassifier(profile_.get()));
-  autocomplete_->Start(input, false);
+  autocomplete_->Start(input, false, false);
   // HistoryURLProvider shouldn't be done (waiting on async results).
   EXPECT_FALSE(autocomplete_->done());
 
   // We should get back an entry for pandora.
   matches_ = autocomplete_->matches();
   ASSERT_GT(matches_.size(), 0u);
   EXPECT_EQ(GURL("http://pandora.com/"), matches_[0].destination_url);
   int pandora_relevance = matches_[0].relevance;
 
   // Run the message loop. When |autocomplete_| finishes the loop is quit.
@@ skipping 22 matching lines @@
 
   RunTest(ASCIIToUTF16("this is a query"), std::string(), false, NULL, 0);
 }
 
 TEST_F(HistoryURLProviderTest, DontAutocompleteOnTrailingWhitespace) {
   AutocompleteInput input(ASCIIToUTF16("slash "), base::string16::npos,
                           std::string(), GURL(),
                           metrics::OmniboxEventProto::INVALID_SPEC, false,
                           false, true, true,
                           ChromeAutocompleteSchemeClassifier(profile_.get()));
-  autocomplete_->Start(input, false);
+  autocomplete_->Start(input, false, false);
   if (!autocomplete_->done())
     base::MessageLoop::current()->Run();
 
   // None of the matches should attempt to autocomplete.
   matches_ = autocomplete_->matches();
   for (size_t i = 0; i < matches_.size(); ++i) {
     EXPECT_TRUE(matches_[i].inline_autocompletion.empty());
     EXPECT_FALSE(matches_[i].allowed_to_be_default_match);
   }
 }
@@ skipping 117 matching lines @@
     "//c",
     "\\@st",
     "view-source:x",
   };
   for (size_t i = 0; i < arraysize(test_cases); ++i) {
     AutocompleteInput input(ASCIIToUTF16(test_cases[i]), base::string16::npos,
                             std::string(), GURL(),
                             metrics::OmniboxEventProto::INVALID_SPEC,
                             false, false, true, true,
                             ChromeAutocompleteSchemeClassifier(profile_.get()));
-    autocomplete_->Start(input, false);
+    autocomplete_->Start(input, false, false);
     if (!autocomplete_->done())
       base::MessageLoop::current()->Run();
   }
 }
 
+TEST_F(HistoryURLProviderTest, DoesNotProvideMatchesOnFocus) {
+  AutocompleteInput input(ASCIIToUTF16("foo"), base::string16::npos,
+                          std::string(), GURL(),
+                          metrics::OmniboxEventProto::INVALID_SPEC,
+                          false, false, true, true,
+                          ChromeAutocompleteSchemeClassifier(profile_.get()));
+  autocomplete_->Start(input, false, true);
+  EXPECT_TRUE(autocomplete_->matches().empty());
+}
+
 TEST_F(HistoryURLProviderTest, CullSearchResults) {
   // Set up a default search engine.
   TemplateURLData data;
   data.SetKeyword(ASCIIToUTF16("TestEngine"));
   data.SetURL("http://testsearch.com/?q={searchTerms}");
   TemplateURLService* template_url_service =
       TemplateURLServiceFactory::GetForProfile(profile_.get());
   TemplateURL* template_url = new TemplateURL(data);
   template_url_service->Add(template_url);
   template_url_service->SetUserSelectedDefaultSearchProvider(template_url);
@@ skipping 212 matching lines @@
     // Test the experiment (scoring enabled).
     autocomplete_->scoring_params_.experimental_scoring_enabled = true;
     ASSERT_NO_FATAL_FAILURE(RunTest(ASCIIToUTF16(test_cases[i].input),
                                     std::string(), false, output, max_matches));
     for (int j = 0; j < max_matches; ++j) {
       EXPECT_EQ(test_cases[i].matches[j].experiment_relevance,
                 matches_[j].relevance);
     }
   }
 }