| // Copyright (c) 2009 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 "courgette/difference_estimator.h" |
| |
| #include <string> |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "courgette/region.h" |
| |
| using courgette::DifferenceEstimator; |
| using courgette::Region; |
| |
| TEST(DifferenceEstimatorTest, TestSame) { |
| static const char kString1[] = "Hello world"; |
| // kString2 is stack allocated to prevent string sharing. |
| const char kString2[] = "Hello world"; |
| DifferenceEstimator difference_estimator; |
| DifferenceEstimator::Base* base = |
| difference_estimator.MakeBase(Region(kString1, sizeof(kString1))); |
| DifferenceEstimator::Subject* subject = |
| difference_estimator.MakeSubject(Region(kString2, sizeof(kString2))); |
| EXPECT_EQ(0U, difference_estimator.Measure(base, subject)); |
| } |
| |
| TEST(DifferenceEstimatorTest, TestDifferent) { |
| static const char kString1[] = "Hello world"; |
| static const char kString2[] = "Hello universe"; |
| DifferenceEstimator difference_estimator; |
| DifferenceEstimator::Base* base = |
| difference_estimator.MakeBase(Region(kString1, sizeof(kString1))); |
| DifferenceEstimator::Subject* subject = |
| difference_estimator.MakeSubject(Region(kString2, sizeof(kString2))); |
| EXPECT_EQ(10U, difference_estimator.Measure(base, subject)); |
| } |
| |
| TEST(DifferenceEstimatorTest, TestDifferentSuperstring) { |
| static const char kString1[] = "abcdabcdabcd"; |
| static const char kString2[] = "abcdabcdabcdabcd"; |
| DifferenceEstimator difference_estimator; |
| DifferenceEstimator::Base* base = |
| difference_estimator.MakeBase(Region(kString1, sizeof(kString1)-1)); |
| DifferenceEstimator::Subject* subject = |
| difference_estimator.MakeSubject(Region(kString2, sizeof(kString2)-1)); |
| EXPECT_EQ(1U, difference_estimator.Measure(base, subject)); |
| } |
| |
| TEST(DifferenceEstimatorTest, TestDifferentSubstring) { |
| static const char kString1[] = "abcdabcdabcdabcd"; |
| static const char kString2[] = "abcdabcdabcd"; |
| DifferenceEstimator difference_estimator; |
| DifferenceEstimator::Base* base = |
| difference_estimator.MakeBase(Region(kString1, sizeof(kString1)-1)); |
| DifferenceEstimator::Subject* subject = |
| difference_estimator.MakeSubject(Region(kString2, sizeof(kString2)-1)); |
| EXPECT_EQ(1U, difference_estimator.Measure(base, subject)); |
| } |