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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
*/
#include "config.h"
#include "DFAHelpers.h"
#include <WebCore/DFACombiner.h>
#include <wtf/MainThread.h>
using namespace WebCore;
using namespace ContentExtensions;
namespace TestWebKitAPI {
class DFACombinerTest : public testing::Test {
public:
virtual void SetUp()
{
WTF::initializeMainThread();
}
};
Vector<DFA> combine(Vector<DFA> dfas, unsigned minimumSize)
{
DFACombiner combiner;
for (DFA& dfa : dfas)
combiner.addDFA(WTFMove(dfa));
Vector<DFA> output;
combiner.combineDFAs(minimumSize, [&output](DFA&& dfa) {
output.append(dfa);
});
return output;
}
TEST_F(DFACombinerTest, Basic)
{
Vector<DFA> dfas = { buildDFAFromPatterns({ "foo"}), buildDFAFromPatterns({ "bar"}) };
Vector<DFA> combinedDFAs = combine(dfas, 10000);
EXPECT_EQ(static_cast<size_t>(1), combinedDFAs.size());
DFA reference = buildDFAFromPatterns({ "foo", "bar"});
reference.minimize();
EXPECT_EQ(countLiveNodes(reference), countLiveNodes(combinedDFAs.first()));
}
TEST_F(DFACombinerTest, IdenticalDFAs)
{
Vector<DFA> dfas = { buildDFAFromPatterns({ "foo"}), buildDFAFromPatterns({ "foo"}) };
Vector<DFA> combinedDFAs = combine(dfas, 10000);
EXPECT_EQ(static_cast<size_t>(1), combinedDFAs.size());
// The result should have the exact same size as the minimized input.
DFA reference = buildDFAFromPatterns({ "foo"});
reference.minimize();
EXPECT_EQ(countLiveNodes(reference), countLiveNodes(combinedDFAs.first()));
}
TEST_F(DFACombinerTest, NoInput)
{
DFACombiner combiner;
unsigned counter = 0;
combiner.combineDFAs(100000, [&counter](DFA&& dfa) {
++counter;
});
EXPECT_EQ(static_cast<unsigned>(0), counter);
}
TEST_F(DFACombinerTest, SingleInput)
{
Vector<DFA> dfas = { buildDFAFromPatterns({ "WebKit"}) };
Vector<DFA> combinedDFAs = combine(dfas, 10000);
EXPECT_EQ(static_cast<size_t>(1), combinedDFAs.size());
DFA reference = buildDFAFromPatterns({ "WebKit"});
reference.minimize();
EXPECT_EQ(countLiveNodes(reference), countLiveNodes(combinedDFAs.first()));
}
TEST_F(DFACombinerTest, InputTooLargeForMinimumSize)
{
Vector<DFA> dfas = { buildDFAFromPatterns({ "foo"}), buildDFAFromPatterns({ "bar"}) };
Vector<DFA> combinedDFAs = combine(dfas, 2);
EXPECT_EQ(static_cast<size_t>(2), combinedDFAs.size());
EXPECT_EQ(static_cast<size_t>(4), countLiveNodes(combinedDFAs[0]));
EXPECT_EQ(static_cast<size_t>(4), countLiveNodes(combinedDFAs[1]));
}
TEST_F(DFACombinerTest, CombinedInputReachesMinimumSize)
{
Vector<DFA> dfas = { buildDFAFromPatterns({ "foo"}), buildDFAFromPatterns({ "bar"}), buildDFAFromPatterns({ "WebKit"}) };
Vector<DFA> combinedDFAs = combine(dfas, 5);
EXPECT_EQ(static_cast<size_t>(2), combinedDFAs.size());
EXPECT_EQ(static_cast<size_t>(7), countLiveNodes(combinedDFAs[0]));
EXPECT_EQ(static_cast<size_t>(6), countLiveNodes(combinedDFAs[1]));
}
} // namespace TestWebKitAPI
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