base/i18n: Class for efficiently searching the same query over many texts.

base/i18n/string_search_unittest.cc

 // Copyright (c) 2011 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 <string>
 
 #include "base/i18n/rtl.h"
 #include "base/i18n/string_search.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 181 matching lines @@
 
   const char* default_locale = uloc_getDefault();
   SetICUDefaultLocale("da");
 
   EXPECT_FALSE(StringSearchIgnoringCaseAndAccents(
       a_base, a_with_ring, NULL, NULL));
 
   SetICUDefaultLocale(default_locale);
 }
 
+TEST(StringSearchTest, FixedPatternMultipleSearch) {
+  std::string default_locale(uloc_getDefault());
+  bool locale_is_posix = (default_locale == "en_US_POSIX");
+  if (locale_is_posix)
+    SetICUDefaultLocale("en_US");
+
+  size_t index = 0;
+  size_t length = 0;
+
+  // Search "hello" over multiple texts.
+  FixedPatternStringSearchIgnoringCaseAndAccents query(ASCIIToUTF16("hello"));
+  EXPECT_TRUE(query.Search(ASCIIToUTF16("12hello34"), &index, &length));
+  EXPECT_EQ(2U, index);
+  EXPECT_EQ(5U, length);
+  EXPECT_FALSE(query.Search(ASCIIToUTF16("bye"), &index, &length));
+  EXPECT_TRUE(query.Search(ASCIIToUTF16("hELLo"), &index, &length));
+  EXPECT_EQ(0U, index);
+  EXPECT_EQ(5U, length);
+
+  if (locale_is_posix)
+    SetICUDefaultLocale(default_locale.data());
+}
+
 }  // namespace i18n
 }  // namespace base