// // 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 #include #include #include #include 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*) 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; } }