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// Copyright 2007-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifdef ENABLE_DEBUGGER_SUPPORT
#include <stdlib.h>
#include "v8.h"
#include "liveedit.h"
#include "cctest.h"
using namespace v8::internal;
// Anonymous namespace.
namespace {
class StringCompareInput : public Comparator::Input {
public:
StringCompareInput(const char* s1, const char* s2) : s1_(s1), s2_(s2) {
}
int GetLength1() {
return StrLength(s1_);
}
int GetLength2() {
return StrLength(s2_);
}
bool Equals(int index1, int index2) {
return s1_[index1] == s2_[index2];
}
private:
const char* s1_;
const char* s2_;
};
class DiffChunkStruct : public ZoneObject {
public:
DiffChunkStruct(int pos1_param, int pos2_param,
int len1_param, int len2_param)
: pos1(pos1_param), pos2(pos2_param),
len1(len1_param), len2(len2_param), next(NULL) {}
int pos1;
int pos2;
int len1;
int len2;
DiffChunkStruct* next;
};
class ListDiffOutputWriter : public Comparator::Output {
public:
explicit ListDiffOutputWriter(DiffChunkStruct** next_chunk_pointer)
: next_chunk_pointer_(next_chunk_pointer) {
(*next_chunk_pointer_) = NULL;
}
void AddChunk(int pos1, int pos2, int len1, int len2) {
current_chunk_ = new(Isolate::Current()->runtime_zone()) DiffChunkStruct(
pos1, pos2, len1, len2);
(*next_chunk_pointer_) = current_chunk_;
next_chunk_pointer_ = ¤t_chunk_->next;
}
private:
DiffChunkStruct** next_chunk_pointer_;
DiffChunkStruct* current_chunk_;
};
void CompareStringsOneWay(const char* s1, const char* s2,
int expected_diff_parameter = -1) {
StringCompareInput input(s1, s2);
ZoneScope zone_scope(Isolate::Current()->runtime_zone(), DELETE_ON_EXIT);
DiffChunkStruct* first_chunk;
ListDiffOutputWriter writer(&first_chunk);
Comparator::CalculateDifference(&input, &writer);
int len1 = StrLength(s1);
int len2 = StrLength(s2);
int pos1 = 0;
int pos2 = 0;
int diff_parameter = 0;
for (DiffChunkStruct* chunk = first_chunk;
chunk != NULL;
chunk = chunk->next) {
int diff_pos1 = chunk->pos1;
int similar_part_length = diff_pos1 - pos1;
int diff_pos2 = pos2 + similar_part_length;
ASSERT_EQ(diff_pos2, chunk->pos2);
for (int j = 0; j < similar_part_length; j++) {
ASSERT(pos1 + j < len1);
ASSERT(pos2 + j < len2);
ASSERT_EQ(s1[pos1 + j], s2[pos2 + j]);
}
diff_parameter += chunk->len1 + chunk->len2;
pos1 = diff_pos1 + chunk->len1;
pos2 = diff_pos2 + chunk->len2;
}
{
// After last chunk.
int similar_part_length = len1 - pos1;
ASSERT_EQ(similar_part_length, len2 - pos2);
USE(len2);
for (int j = 0; j < similar_part_length; j++) {
ASSERT(pos1 + j < len1);
ASSERT(pos2 + j < len2);
ASSERT_EQ(s1[pos1 + j], s2[pos2 + j]);
}
}
if (expected_diff_parameter != -1) {
ASSERT_EQ(expected_diff_parameter, diff_parameter);
}
}
void CompareStrings(const char* s1, const char* s2,
int expected_diff_parameter = -1) {
CompareStringsOneWay(s1, s2, expected_diff_parameter);
CompareStringsOneWay(s2, s1, expected_diff_parameter);
}
} // Anonymous namespace.
// --- T h e A c t u a l T e s t s
TEST(LiveEditDiffer) {
v8::internal::V8::Initialize(NULL);
CompareStrings("zz1zzz12zz123zzz", "zzzzzzzzzz", 6);
CompareStrings("zz1zzz12zz123zzz", "zz0zzz0zz0zzz", 9);
CompareStrings("123456789", "987654321", 16);
CompareStrings("zzz", "yyy", 6);
CompareStrings("zzz", "zzz12", 2);
CompareStrings("zzz", "21zzz", 2);
CompareStrings("cat", "cut", 2);
CompareStrings("ct", "cut", 1);
CompareStrings("cat", "ct", 1);
CompareStrings("cat", "cat", 0);
CompareStrings("", "", 0);
CompareStrings("cat", "", 3);
CompareStrings("a cat", "a capybara", 7);
CompareStrings("abbabababababaaabbabababababbabbbbbbbababa",
"bbbbabababbbabababbbabababababbabbababa");
}
#endif // ENABLE_DEBUGGER_SUPPORT
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