// 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 "base/string16.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/autofill/autofill_field.h"
#include "chrome/browser/autofill/form_field.h"
#include "testing/gtest/include/gtest/gtest.h"

TEST(FormFieldTest, Match) {
  AutofillField field;

  // Empty strings match.
  EXPECT_TRUE(FormField::Match(&field, string16(), FormField::MATCH_LABEL));

  // Empty pattern matches non-empty string.
  field.label = ASCIIToUTF16("a");
  EXPECT_TRUE(FormField::Match(&field, string16(), FormField::MATCH_LABEL));

  // Strictly empty pattern matches empty string.
  field.label = string16();
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("^$"),
              FormField::MATCH_LABEL));

  // Strictly empty pattern does not match non-empty string.
  field.label = ASCIIToUTF16("a");
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("^$"),
               FormField::MATCH_LABEL));

  // Non-empty pattern doesn't match empty string.
  field.label = string16();
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("a"),
               FormField::MATCH_LABEL));

  // Beginning of line.
  field.label = ASCIIToUTF16("head_tail");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("^head"),
              FormField::MATCH_LABEL));
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("^tail"),
               FormField::MATCH_LABEL));

  // End of line.
  field.label = ASCIIToUTF16("head_tail");
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("head$"),
               FormField::MATCH_LABEL));
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("tail$"),
              FormField::MATCH_LABEL));

  // Exact.
  field.label = ASCIIToUTF16("head_tail");
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("^head$"),
               FormField::MATCH_LABEL));
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("^tail$"),
               FormField::MATCH_LABEL));
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("^head_tail$"),
              FormField::MATCH_LABEL));

  // Escaped dots.
  field.label = ASCIIToUTF16("m.i.");
  // Note: This pattern is misleading as the "." characters are wild cards.
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("m.i."),
              FormField::MATCH_LABEL));
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("m\\.i\\."),
              FormField::MATCH_LABEL));
  field.label = ASCIIToUTF16("mXiX");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("m.i."),
              FormField::MATCH_LABEL));
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("m\\.i\\."),
               FormField::MATCH_LABEL));

  // Repetition.
  field.label = ASCIIToUTF16("headtail");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("head.*tail"),
              FormField::MATCH_LABEL));
  field.label = ASCIIToUTF16("headXtail");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("head.*tail"),
              FormField::MATCH_LABEL));
  field.label = ASCIIToUTF16("headXXXtail");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("head.*tail"),
              FormField::MATCH_LABEL));
  field.label = ASCIIToUTF16("headtail");
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("head.+tail"),
               FormField::MATCH_LABEL));
  field.label = ASCIIToUTF16("headXtail");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("head.+tail"),
              FormField::MATCH_LABEL));
  field.label = ASCIIToUTF16("headXXXtail");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("head.+tail"),
              FormField::MATCH_LABEL));

  // Alternation.
  field.label = ASCIIToUTF16("head_tail");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("head|other"),
              FormField::MATCH_LABEL));
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("tail|other"),
              FormField::MATCH_LABEL));
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("bad|good"),
               FormField::MATCH_LABEL));

  // Case sensitivity.
  field.label = ASCIIToUTF16("xxxHeAd_tAiLxxx");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("head_tail"),
              FormField::MATCH_LABEL));

  // Word boundaries.
  field.label = ASCIIToUTF16("contains word:");
  EXPECT_TRUE(FormField::Match(&field, ASCIIToUTF16("\\bword\\b"),
                               FormField::MATCH_LABEL));
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("\\bcon\\b"),
                                FormField::MATCH_LABEL));
  // Make sure the circumflex in 'crepe' is not treated as a word boundary.
  field.label = UTF8ToUTF16("cr" "\xC3\xAA" "pe");
  EXPECT_FALSE(FormField::Match(&field, ASCIIToUTF16("\\bcr\\b"),
                                FormField::MATCH_LABEL));
}