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// Copyright 2017 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 "components/zucchini/element_detection.h"
#include <vector>
#include "base/bind.h"
#include "components/zucchini/buffer_view.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace zucchini {
namespace {
using ElementVector = std::vector<Element>;
} // namespace
TEST(ElementDetectionTest, ElementFinderEmpty) {
std::vector<uint8_t> buffer(10, 0);
ElementFinder finder(
ConstBufferView(buffer.data(), buffer.size()),
base::BindRepeating([](ConstBufferView image) -> base::Optional<Element> {
return base::nullopt;
}));
EXPECT_EQ(base::nullopt, finder.GetNext());
}
ElementVector TestElementFinder(std::vector<uint8_t> buffer) {
ConstBufferView image(buffer.data(), buffer.size());
ElementFinder finder(
image,
base::BindRepeating(
[](ConstBufferView image,
ConstBufferView region) -> base::Optional<Element> {
EXPECT_GE(region.begin(), image.begin());
EXPECT_LE(region.end(), image.end());
EXPECT_GE(region.size(), 0U);
if (region[0] != 0) {
offset_t length = 1;
while (length < region.size() && region[length] == region[0])
++length;
return Element{{0, length},
static_cast<ExecutableType>(region[0])};
}
return base::nullopt;
},
image));
std::vector<Element> elements;
for (auto element = finder.GetNext(); element; element = finder.GetNext()) {
elements.push_back(*element);
}
return elements;
}
TEST(ElementDetectionTest, ElementFinder) {
EXPECT_EQ(ElementVector(), TestElementFinder({}));
EXPECT_EQ(ElementVector(), TestElementFinder({0, 0}));
EXPECT_EQ(ElementVector({{{0, 2}, kExeTypeWin32X86}}),
TestElementFinder({1, 1}));
EXPECT_EQ(
ElementVector({{{0, 2}, kExeTypeWin32X86}, {{2, 2}, kExeTypeWin32X64}}),
TestElementFinder({1, 1, 2, 2}));
EXPECT_EQ(ElementVector({{{1, 2}, kExeTypeWin32X86}}),
TestElementFinder({0, 1, 1, 0}));
EXPECT_EQ(
ElementVector({{{1, 2}, kExeTypeWin32X86}, {{3, 3}, kExeTypeWin32X64}}),
TestElementFinder({0, 1, 1, 2, 2, 2}));
EXPECT_EQ(
ElementVector({{{1, 2}, kExeTypeWin32X86}, {{4, 3}, kExeTypeWin32X64}}),
TestElementFinder({0, 1, 1, 0, 2, 2, 2}));
}
} // namespace zucchini
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