Create a new helper function to extract search terms from the URL irrespective of the availablility

chrome/browser/search/search_unittest.cc

 // Copyright (c) 2013 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 "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/histogram_samples.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/prefs/pref_service.h"
@@ skipping 758 matching lines @@
   // "prefetch_results" flag is enabled via field trials.
   ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
       "EmbeddedSearch",
       "Group1 espv:80 prefetch_results:1"));
   EXPECT_TRUE(ShouldPrefetchSearchResults());
 
   EXPECT_EQ(GURL("https://foo.com/instant?ion=1&foo=foo#foo=foo&strk"),
             GetSearchResultPrefetchBaseURL(profile()));
 }
 
+struct SearchURLTestCase {
+  const char* url;
+  const char* expected_result;
+  const char* comment;
+};
+
+TEST_F(SearchTest, ExtractSearchTermsFromURL) {
+  const SearchURLTestCase kTestCases[] = {
+    {chrome::kChromeSearchLocalNtpUrl,           "",    "NTP url"},
+    {"https://foo.com/instant?strk",             "",    "Invalid search url"},
+    {"https://foo.com/instant#strk",             "",    "Invalid search url"},
+    {"https://foo.com/alt#quux=foo",             "foo", "Valid search url"},
+    {"https://foo.com/alt#quux=foo&strk",        "foo", "Valid search url"}
+  };
+
+  for (size_t i = 0; i < arraysize(kTestCases); ++i) {
+    const SearchURLTestCase& test = kTestCases[i];
+    EXPECT_EQ(
+        test.expected_result,
+        UTF16ToASCII(chrome::ExtractSearchTermsFromURL(profile(),
+                                                       GURL(test.url))))
+            << test.url << " " << test.comment;
+  }
+}
+
+struct InstantURLTestCase {
+  const char* url;
+  bool expected_result;
+  const char* comment;
+};
+
+TEST_F(SearchTest, IsSuitableForInstant) {
+  const InstantURLTestCase kTestCases[] = {
+    {"http://foo.com/instant?strk",       false, "HTTP URL"},
+    {"https://foo.com/instant?strk",      true,  "Valid URL"},
+    {"https://foo.com/instant?",          false,
+     "No search terms replacement key"},
+    {"https://foo.com/alt#quux=foo",      false,
+     "No search terms replacement key"},
+    {"https://foo.com/alt#quux=foo&strk", true,  "Valid search url"}
+  };
+
+  for (size_t i = 0; i < arraysize(kTestCases); ++i) {
+    const InstantURLTestCase& test = kTestCases[i];
+    EXPECT_EQ(test.expected_result,
+              chrome::IsSuitableURLForInstant(profile(), GURL(test.url)))
+        << test.url << " " << test.comment;
+  }
+}
+
 typedef SearchTest IsQueryExtractionEnabledTest;
 
 TEST_F(IsQueryExtractionEnabledTest, NotSet) {
   ASSERT_TRUE(base::FieldTrialList::CreateFieldTrial(
       "EmbeddedSearch", "Group1 espv:2"));
   EXPECT_TRUE(IsInstantExtendedAPIEnabled());
   EXPECT_FALSE(IsQueryExtractionEnabled());
   EXPECT_EQ(2ul, EmbeddedSearchPageVersion());
 }
 
@@ skipping 282 matching lines @@
 }
 
 TEST_F(OriginChipV2Test, CommandLineHideOnUserInput) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableOriginChipV2HideOnUserInput);
   EXPECT_TRUE(ShouldDisplayOriginChipV2());
   EXPECT_EQ(ORIGIN_CHIP_V2_HIDE_ON_USER_INPUT, GetOriginChipV2HideTrigger());
 }
 
 }  // namespace chrome