Move MatchPattern to its own header and the base namespace.

base/strings/pattern_unittest.cc

+// Copyright 2015 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/strings/pattern.h"
+#include "base/strings/utf_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+
+TEST(StringUtilTest, MatchPatternTest) {
+  EXPECT_TRUE(MatchPattern("www.google.com", "*.com"));
+  EXPECT_TRUE(MatchPattern("www.google.com", "*"));
+  EXPECT_FALSE(MatchPattern("www.google.com", "www*.g*.org"));
+  EXPECT_TRUE(MatchPattern("Hello", "H?l?o"));
+  EXPECT_FALSE(MatchPattern("www.google.com", "http://*)"));
+  EXPECT_FALSE(MatchPattern("www.msn.com", "*.COM"));
+  EXPECT_TRUE(MatchPattern("Hello*1234", "He??o\\*1*"));
+  EXPECT_FALSE(MatchPattern("", "*.*"));
+  EXPECT_TRUE(MatchPattern("", "*"));
+  EXPECT_TRUE(MatchPattern("", "?"));
+  EXPECT_TRUE(MatchPattern("", ""));
+  EXPECT_FALSE(MatchPattern("Hello", ""));
+  EXPECT_TRUE(MatchPattern("Hello*", "Hello*"));
+  // Stop after a certain recursion depth.
+  EXPECT_FALSE(MatchPattern("123456789012345678", "?????????????????*"));
+
+  // Test UTF8 matching.
+  EXPECT_TRUE(MatchPattern("heart: \xe2\x99\xa0", "*\xe2\x99\xa0"));
+  EXPECT_TRUE(MatchPattern("heart: \xe2\x99\xa0.", "heart: ?."));
+  EXPECT_TRUE(MatchPattern("hearts: \xe2\x99\xa0\xe2\x99\xa0", "*"));
+  // Invalid sequences should be handled as a single invalid character.
+  EXPECT_TRUE(MatchPattern("invalid: \xef\xbf\xbe", "invalid: ?"));
+  // If the pattern has invalid characters, it shouldn't match anything.
+  EXPECT_FALSE(MatchPattern("\xf4\x90\x80\x80", "\xf4\x90\x80\x80"));
+
+  // Test UTF16 character matching.
+  EXPECT_TRUE(MatchPattern(UTF8ToUTF16("www.google.com"),
+                           UTF8ToUTF16("*.com")));
+  EXPECT_TRUE(MatchPattern(UTF8ToUTF16("Hello*1234"),
+                           UTF8ToUTF16("He??o\\*1*")));
+
+  // This test verifies that consecutive wild cards are collapsed into 1
+  // wildcard (when this doesn't occur, MatchPattern reaches it's maximum
+  // recursion depth).
+  EXPECT_TRUE(MatchPattern(UTF8ToUTF16("Hello"),
+                           UTF8ToUTF16("He********************************o")));
+}
+
+}  // namespace base