Ninja
edit_distance_test.cc
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00001 // Copyright 2011 Google Inc. All Rights Reserved.
00002 //
00003 // Licensed under the Apache License, Version 2.0 (the "License");
00004 // you may not use this file except in compliance with the License.
00005 // You may obtain a copy of the License at
00006 //
00007 //     http://www.apache.org/licenses/LICENSE-2.0
00008 //
00009 // Unless required by applicable law or agreed to in writing, software
00010 // distributed under the License is distributed on an "AS IS" BASIS,
00011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00012 // See the License for the specific language governing permissions and
00013 // limitations under the License.
00014 
00015 #include "edit_distance.h"
00016 
00017 #include "test.h"
00018 
00019 TEST(EditDistanceTest, TestEmpty) {
00020   EXPECT_EQ(5, EditDistance("", "ninja"));
00021   EXPECT_EQ(5, EditDistance("ninja", ""));
00022   EXPECT_EQ(0, EditDistance("", ""));
00023 }
00024 
00025 TEST(EditDistanceTest, TestMaxDistance) {
00026   const bool allow_replacements = true;
00027   for (int max_distance = 1; max_distance < 7; ++max_distance) {
00028     EXPECT_EQ(max_distance + 1,
00029               EditDistance("abcdefghijklmnop", "ponmlkjihgfedcba",
00030                            allow_replacements, max_distance));
00031   }
00032 }
00033 
00034 TEST(EditDistanceTest, TestAllowReplacements) {
00035   bool allow_replacements = true;
00036   EXPECT_EQ(1, EditDistance("ninja", "njnja", allow_replacements));
00037   EXPECT_EQ(1, EditDistance("njnja", "ninja", allow_replacements));
00038 
00039   allow_replacements = false;
00040   EXPECT_EQ(2, EditDistance("ninja", "njnja", allow_replacements));
00041   EXPECT_EQ(2, EditDistance("njnja", "ninja", allow_replacements));
00042 }
00043 
00044 TEST(EditDistanceTest, TestBasics) {
00045   EXPECT_EQ(0, EditDistance("browser_tests", "browser_tests"));
00046   EXPECT_EQ(1, EditDistance("browser_test", "browser_tests"));
00047   EXPECT_EQ(1, EditDistance("browser_tests", "browser_test"));
00048 }