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- // 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));
- }
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