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//
// Copyright (C) 2023 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "super_flash_helper.h"
#include <unistd.h>
#include <android-base/file.h>
#include <android-base/unique_fd.h>
#include <gtest/gtest.h>
#include <sparse/sparse.h>
using android::base::unique_fd;
unique_fd OpenTestFile(const std::string& file, int flags) {
std::string path = "testdata/" + file;
unique_fd fd(open(path.c_str(), flags));
if (fd >= 0) {
return fd;
}
path = android::base::GetExecutableDirectory() + "/" + path;
return unique_fd{open(path.c_str(), flags)};
}
class TestImageSource final : public ImageSource {
public:
bool ReadFile(const std::string&, std::vector<char>*) const override {
// Not used here.
return false;
}
unique_fd OpenFile(const std::string& name) const override {
return OpenTestFile(name, O_RDONLY | O_CLOEXEC);
}
};
TEST(SuperFlashHelper, ImageEquality) {
auto super_empty_fd = OpenTestFile("super_empty.img", O_RDONLY);
ASSERT_GE(super_empty_fd, 0);
TestImageSource source;
SuperFlashHelper helper(source);
ASSERT_TRUE(helper.Open(super_empty_fd));
ASSERT_TRUE(helper.AddPartition("system_a", "system.img", false));
auto sparse_file = helper.GetSparseLayout();
ASSERT_NE(sparse_file, nullptr);
TemporaryFile fb_super;
ASSERT_GE(fb_super.fd, 0);
ASSERT_EQ(sparse_file_write(sparse_file.get(), fb_super.fd, false, false, false), 0);
auto real_super_fd = OpenTestFile("super.img", O_RDONLY);
ASSERT_GE(real_super_fd, 0);
std::string expected(get_file_size(real_super_fd), '\0');
ASSERT_FALSE(expected.empty());
ASSERT_TRUE(android::base::ReadFully(real_super_fd, expected.data(), expected.size()));
std::string actual(get_file_size(fb_super.fd), '\0');
ASSERT_FALSE(actual.empty());
ASSERT_EQ(lseek(fb_super.fd, 0, SEEK_SET), 0);
ASSERT_TRUE(android::base::ReadFully(fb_super.fd, actual.data(), actual.size()));
// The helper doesn't add any extra zeroes to the image, whereas lpmake does, to
// pad to the entire super size.
ASSERT_LE(actual.size(), expected.size());
for (size_t i = 0; i < actual.size(); i++) {
ASSERT_EQ(actual[i], expected[i]) << "byte mismatch at position " << i;
}
for (size_t i = actual.size(); i < expected.size(); i++) {
ASSERT_EQ(expected[i], 0) << "byte mismatch at position " << i;
}
}
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