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

base/i18n/string_search_unittest.cc

Index: base/i18n/string_search_unittest.cc
diff --git a/base/i18n/string_search_unittest.cc b/base/i18n/string_search_unittest.cc
index b24600e1d4a1a2f54061428b5bc50de65930d95b..d2bd53a6d130a0441fc9f2e7de587c80b646926b 100644
--- a/base/i18n/string_search_unittest.cc
+++ b/base/i18n/string_search_unittest.cc
@@ -199,5 +199,28 @@ TEST(StringSearchTest, UnicodeLocaleDependent) {
   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