tests/component/applypatch_test.cpp - platform/bootable/recovery - Git at Google

 /*
  * Copyright (C) 2016 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 agree 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 <fcntl.h>
 #include <gtest/gtest.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/stat.h>
 #include <sys/statvfs.h>
 #include <sys/types.h>
 #include <time.h>

 #include <string>

 #include <android-base/file.h>
 #include <android-base/stringprintf.h>
 #include <android-base/test_utils.h>

 #include "applypatch/applypatch.h"
 #include "common/test_constants.h"
 #include "openssl/sha.h"
 #include "print_sha1.h"

 static const std::string DATA_PATH = getenv("ANDROID_DATA");
 static const std::string TESTDATA_PATH = "/recovery/testdata";
 static const std::string WORK_FS = "/data";

 static std::string sha1sum(const std::string& fname) {
     uint8_t digest[SHA_DIGEST_LENGTH];
     std::string data;
     android::base::ReadFileToString(fname, &data);

     SHA1((const uint8_t*)data.c_str(), data.size(), digest);
     return print_sha1(digest);
 }

 static void mangle_file(const std::string& fname) {
     FILE* fh = fopen(&fname[0], "w");
     int r;
     for (int i=0; i < 1024; i++) {
         r = rand();
         fwrite(&r, sizeof(short), 1, fh);
     }
     fclose(fh);
 }

 static bool file_cmp(std::string& f1, std::string& f2) {
     std::string c1;
     std::string c2;
     android::base::ReadFileToString(f1, &c1);
     android::base::ReadFileToString(f2, &c2);
     return c1 == c2;
 }

 static std::string from_testdata_base(const std::string fname) {
     return android::base::StringPrintf("%s%s%s/%s",
             &DATA_PATH[0],
             &NATIVE_TEST_PATH[0],
             &TESTDATA_PATH[0],
             &fname[0]);
 }

 class ApplyPatchTest : public ::testing::Test {
     public:
         static void SetUpTestCase() {
             // set up files
             old_file = from_testdata_base("old.file");
             new_file = from_testdata_base("new.file");
             patch_file = from_testdata_base("patch.bsdiff");
             rand_file = "/cache/applypatch_test_rand.file";
             cache_file = "/cache/saved.file";

             // write stuff to rand_file
             android::base::WriteStringToFile("hello", rand_file);

             // set up SHA constants
             old_sha1 = sha1sum(old_file);
             new_sha1 = sha1sum(new_file);
             srand(time(NULL));
             bad_sha1_a = android::base::StringPrintf("%040x", rand());
             bad_sha1_b = android::base::StringPrintf("%040x", rand());

             struct stat st;
             stat(&new_file[0], &st);
             new_size = st.st_size;
         }

         static std::string old_file;
         static std::string new_file;
         static std::string rand_file;
         static std::string cache_file;
         static std::string patch_file;

         static std::string old_sha1;
         static std::string new_sha1;
         static std::string bad_sha1_a;
         static std::string bad_sha1_b;

         static size_t new_size;
 };

 std::string ApplyPatchTest::old_file;
 std::string ApplyPatchTest::new_file;

 static void cp(std::string src, std::string tgt) {
     std::string cmd = android::base::StringPrintf("cp %s %s",
             &src[0],
             &tgt[0]);
     system(&cmd[0]);
 }

 static void backup_old() {
     cp(ApplyPatchTest::old_file, ApplyPatchTest::cache_file);
 }

 static void restore_old() {
     cp(ApplyPatchTest::cache_file, ApplyPatchTest::old_file);
 }

 class ApplyPatchCacheTest : public ApplyPatchTest {
     public:
         virtual void SetUp() {
             backup_old();
         }

         virtual void TearDown() {
             restore_old();
         }
 };

 class ApplyPatchFullTest : public ApplyPatchCacheTest {
     public:
         static void SetUpTestCase() {
             ApplyPatchTest::SetUpTestCase();
             unsigned long free_kb = FreeSpaceForFile(&WORK_FS[0]);
             ASSERT_GE(free_kb * 1024, new_size * 3 / 2);
             output_f = new TemporaryFile();
             output_loc = std::string(output_f->path);

             struct FileContents fc;

             ASSERT_EQ(0, LoadFileContents(&rand_file[0], &fc));
             Value* patch1 = new Value();
             patch1->type = VAL_BLOB;
             patch1->size = fc.data.size();
             patch1->data = static_cast<char*>(malloc(fc.data.size()));
             memcpy(patch1->data, fc.data.data(), fc.data.size());
             patches.push_back(patch1);

             ASSERT_EQ(0, LoadFileContents(&patch_file[0], &fc));
             Value* patch2 = new Value();
             patch2->type = VAL_BLOB;
             patch2->size = fc.st.st_size;
             patch2->data = static_cast<char*>(malloc(fc.data.size()));
             memcpy(patch2->data, fc.data.data(), fc.data.size());
             patches.push_back(patch2);
         }
         static void TearDownTestCase() {
             delete output_f;
             for (auto it = patches.begin(); it != patches.end(); ++it) {
                 free((*it)->data);
                 delete *it;
             }
             patches.clear();
         }

         static std::vector<Value*> patches;
         static TemporaryFile* output_f;
         static std::string output_loc;
 };

 class ApplyPatchDoubleCacheTest : public ApplyPatchFullTest {
     public:
         virtual void SetUp() {
             ApplyPatchCacheTest::SetUp();
             cp(cache_file, "/cache/reallysaved.file");
         }

         virtual void TearDown() {
             cp("/cache/reallysaved.file", cache_file);
             ApplyPatchCacheTest::TearDown();
         }
 };

 std::string ApplyPatchTest::rand_file;
 std::string ApplyPatchTest::patch_file;
 std::string ApplyPatchTest::cache_file;
 std::string ApplyPatchTest::old_sha1;
 std::string ApplyPatchTest::new_sha1;
 std::string ApplyPatchTest::bad_sha1_a;
 std::string ApplyPatchTest::bad_sha1_b;

 size_t ApplyPatchTest::new_size;

 std::vector<Value*> ApplyPatchFullTest::patches;
 TemporaryFile* ApplyPatchFullTest::output_f;
 std::string ApplyPatchFullTest::output_loc;

 TEST_F(ApplyPatchTest, CheckModeSingle) {
     char* s = &old_sha1[0];
     ASSERT_EQ(0, applypatch_check(&old_file[0], 1, &s));
 }

 TEST_F(ApplyPatchTest, CheckModeMultiple) {
     char* argv[3] = {
         &bad_sha1_a[0],
         &old_sha1[0],
         &bad_sha1_b[0]
     };
     ASSERT_EQ(0, applypatch_check(&old_file[0], 3, argv));
 }

 TEST_F(ApplyPatchTest, CheckModeFailure) {
     char* argv[2] = {
         &bad_sha1_a[0],
         &bad_sha1_b[0]
     };
     ASSERT_NE(0, applypatch_check(&old_file[0], 2, argv));
 }

 TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedSingle) {
     mangle_file(old_file);
     char* s = &old_sha1[0];
     ASSERT_EQ(0, applypatch_check(&old_file[0], 1, &s));
 }

 TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedMultiple) {
     mangle_file(old_file);
     char* argv[3] = {
         &bad_sha1_a[0],
         &old_sha1[0],
         &bad_sha1_b[0]
     };
     ASSERT_EQ(0, applypatch_check(&old_file[0], 3, argv));
 }

 TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedFailure) {
     mangle_file(old_file);
     char* argv[2] = {
         &bad_sha1_a[0],
         &bad_sha1_b[0]
     };
     ASSERT_NE(0, applypatch_check(&old_file[0], 2, argv));
 }

 TEST_F(ApplyPatchCacheTest, CheckCacheMissingSingle) {
     unlink(&old_file[0]);
     char* s = &old_sha1[0];
     ASSERT_EQ(0, applypatch_check(&old_file[0], 1, &s));
 }

 TEST_F(ApplyPatchCacheTest, CheckCacheMissingMultiple) {
     unlink(&old_file[0]);
     char* argv[3] = {
         &bad_sha1_a[0],
         &old_sha1[0],
         &bad_sha1_b[0]
     };
     ASSERT_EQ(0, applypatch_check(&old_file[0], 3, argv));
 }

 TEST_F(ApplyPatchCacheTest, CheckCacheMissingFailure) {
     unlink(&old_file[0]);
     char* argv[2] = {
         &bad_sha1_a[0],
         &bad_sha1_b[0]
     };
     ASSERT_NE(0, applypatch_check(&old_file[0], 2, argv));
 }

 TEST_F(ApplyPatchFullTest, ApplyInPlace) {
     std::vector<char*> sha1s;
     sha1s.push_back(&bad_sha1_a[0]);
     sha1s.push_back(&old_sha1[0]);

     int ap_result = applypatch(&old_file[0],
             "-",
             &new_sha1[0],
             new_size,
             2,
             sha1s.data(),
             patches.data(),
             nullptr);
     ASSERT_EQ(0, ap_result);
     ASSERT_TRUE(file_cmp(old_file, new_file));
     // reapply, applypatch is idempotent so it should succeed
     ap_result = applypatch(&old_file[0],
             "-",
             &new_sha1[0],
             new_size,
             2,
             sha1s.data(),
             patches.data(),
             nullptr);
     ASSERT_EQ(0, ap_result);
     ASSERT_TRUE(file_cmp(old_file, new_file));
 }

 TEST_F(ApplyPatchFullTest, ApplyInNewLocation) {
     std::vector<char*> sha1s;
     sha1s.push_back(&bad_sha1_a[0]);
     sha1s.push_back(&old_sha1[0]);
     int ap_result = applypatch(&old_file[0],
             &output_loc[0],
             &new_sha1[0],
             new_size,
             2,
             sha1s.data(),
             patches.data(),
             nullptr);
     ASSERT_EQ(0, ap_result);
     ASSERT_TRUE(file_cmp(output_loc, new_file));
     ap_result = applypatch(&old_file[0],
             &output_loc[0],
             &new_sha1[0],
             new_size,
             2,
             sha1s.data(),
             patches.data(),
             nullptr);
     ASSERT_EQ(0, ap_result);
     ASSERT_TRUE(file_cmp(output_loc, new_file));
 }

 TEST_F(ApplyPatchFullTest, ApplyCorruptedInNewLocation) {
     mangle_file(old_file);
     std::vector<char*> sha1s;
     sha1s.push_back(&bad_sha1_a[0]);
     sha1s.push_back(&old_sha1[0]);
     int ap_result = applypatch(&old_file[0],
             &output_loc[0],
             &new_sha1[0],
             new_size,
             2,
             sha1s.data(),
             patches.data(),
             nullptr);
     ASSERT_EQ(0, ap_result);
     ASSERT_TRUE(file_cmp(output_loc, new_file));
     ap_result = applypatch(&old_file[0],
             &output_loc[0],
             &new_sha1[0],
             new_size,
             2,
             sha1s.data(),
             patches.data(),
             nullptr);
     ASSERT_EQ(0, ap_result);
     ASSERT_TRUE(file_cmp(output_loc, new_file));
 }

 TEST_F(ApplyPatchDoubleCacheTest, ApplyDoubleCorruptedInNewLocation) {
     mangle_file(old_file);
     mangle_file(cache_file);

     std::vector<char*> sha1s;
     sha1s.push_back(&bad_sha1_a[0]);
     sha1s.push_back(&old_sha1[0]);
     int ap_result = applypatch(&old_file[0],
             &output_loc[0],
             &new_sha1[0],
             new_size,
             2,
             sha1s.data(),
             patches.data(),
             nullptr);
     ASSERT_NE(0, ap_result);
     ASSERT_FALSE(file_cmp(output_loc, new_file));
     ap_result = applypatch(&old_file[0],
             &output_loc[0],
             &new_sha1[0],
             new_size,
             2,
             sha1s.data(),
             patches.data(),
             nullptr);
     ASSERT_NE(0, ap_result);
     ASSERT_FALSE(file_cmp(output_loc, new_file));
 }
	/*
	* Copyright (C) 2016 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 agree 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 <fcntl.h>
	#include <gtest/gtest.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <sys/stat.h>
	#include <sys/statvfs.h>
	#include <sys/types.h>
	#include <time.h>

	#include <string>

	#include <android-base/file.h>
	#include <android-base/stringprintf.h>
	#include <android-base/test_utils.h>

	#include "applypatch/applypatch.h"
	#include "common/test_constants.h"
	#include "openssl/sha.h"
	#include "print_sha1.h"

	static const std::string DATA_PATH = getenv("ANDROID_DATA");
	static const std::string TESTDATA_PATH = "/recovery/testdata";
	static const std::string WORK_FS = "/data";

	static std::string sha1sum(const std::string& fname) {
	uint8_t digest[SHA_DIGEST_LENGTH];
	std::string data;
	android::base::ReadFileToString(fname, &data);

	SHA1((const uint8_t*)data.c_str(), data.size(), digest);
	return print_sha1(digest);
	}

	static void mangle_file(const std::string& fname) {
	FILE* fh = fopen(&fname[0], "w");
	int r;
	for (int i=0; i < 1024; i++) {
	r = rand();
	fwrite(&r, sizeof(short), 1, fh);
	}
	fclose(fh);
	}

	static bool file_cmp(std::string& f1, std::string& f2) {
	std::string c1;
	std::string c2;
	android::base::ReadFileToString(f1, &c1);
	android::base::ReadFileToString(f2, &c2);
	return c1 == c2;
	}

	static std::string from_testdata_base(const std::string fname) {
	return android::base::StringPrintf("%s%s%s/%s",
	&DATA_PATH[0],
	&NATIVE_TEST_PATH[0],
	&TESTDATA_PATH[0],
	&fname[0]);
	}

	class ApplyPatchTest : public ::testing::Test {
	public:
	static void SetUpTestCase() {
	// set up files
	old_file = from_testdata_base("old.file");
	new_file = from_testdata_base("new.file");
	patch_file = from_testdata_base("patch.bsdiff");
	rand_file = "/cache/applypatch_test_rand.file";
	cache_file = "/cache/saved.file";

	// write stuff to rand_file
	android::base::WriteStringToFile("hello", rand_file);

	// set up SHA constants
	old_sha1 = sha1sum(old_file);
	new_sha1 = sha1sum(new_file);
	srand(time(NULL));
	bad_sha1_a = android::base::StringPrintf("%040x", rand());
	bad_sha1_b = android::base::StringPrintf("%040x", rand());

	struct stat st;
	stat(&new_file[0], &st);
	new_size = st.st_size;
	}

	static std::string old_file;
	static std::string new_file;
	static std::string rand_file;
	static std::string cache_file;
	static std::string patch_file;

	static std::string old_sha1;
	static std::string new_sha1;
	static std::string bad_sha1_a;
	static std::string bad_sha1_b;

	static size_t new_size;
	};

	std::string ApplyPatchTest::old_file;
	std::string ApplyPatchTest::new_file;

	static void cp(std::string src, std::string tgt) {
	std::string cmd = android::base::StringPrintf("cp %s %s",
	&src[0],
	&tgt[0]);
	system(&cmd[0]);
	}

	static void backup_old() {
	cp(ApplyPatchTest::old_file, ApplyPatchTest::cache_file);
	}

	static void restore_old() {
	cp(ApplyPatchTest::cache_file, ApplyPatchTest::old_file);
	}

	class ApplyPatchCacheTest : public ApplyPatchTest {
	public:
	virtual void SetUp() {
	backup_old();
	}

	virtual void TearDown() {
	restore_old();
	}
	};

	class ApplyPatchFullTest : public ApplyPatchCacheTest {
	public:
	static void SetUpTestCase() {
	ApplyPatchTest::SetUpTestCase();
	unsigned long free_kb = FreeSpaceForFile(&WORK_FS[0]);
	ASSERT_GE(free_kb * 1024, new_size * 3 / 2);
	output_f = new TemporaryFile();
	output_loc = std::string(output_f->path);

	struct FileContents fc;

	ASSERT_EQ(0, LoadFileContents(&rand_file[0], &fc));
	Value* patch1 = new Value();
	patch1->type = VAL_BLOB;
	patch1->size = fc.data.size();
	patch1->data = static_cast<char*>(malloc(fc.data.size()));
	memcpy(patch1->data, fc.data.data(), fc.data.size());
	patches.push_back(patch1);

	ASSERT_EQ(0, LoadFileContents(&patch_file[0], &fc));
	Value* patch2 = new Value();
	patch2->type = VAL_BLOB;
	patch2->size = fc.st.st_size;
	patch2->data = static_cast<char*>(malloc(fc.data.size()));
	memcpy(patch2->data, fc.data.data(), fc.data.size());
	patches.push_back(patch2);
	}
	static void TearDownTestCase() {
	delete output_f;
	for (auto it = patches.begin(); it != patches.end(); ++it) {
	free((*it)->data);
	delete *it;
	}
	patches.clear();
	}

	static std::vector<Value*> patches;
	static TemporaryFile* output_f;
	static std::string output_loc;
	};

	class ApplyPatchDoubleCacheTest : public ApplyPatchFullTest {
	public:
	virtual void SetUp() {
	ApplyPatchCacheTest::SetUp();
	cp(cache_file, "/cache/reallysaved.file");
	}

	virtual void TearDown() {
	cp("/cache/reallysaved.file", cache_file);
	ApplyPatchCacheTest::TearDown();
	}
	};

	std::string ApplyPatchTest::rand_file;
	std::string ApplyPatchTest::patch_file;
	std::string ApplyPatchTest::cache_file;
	std::string ApplyPatchTest::old_sha1;
	std::string ApplyPatchTest::new_sha1;
	std::string ApplyPatchTest::bad_sha1_a;
	std::string ApplyPatchTest::bad_sha1_b;

	size_t ApplyPatchTest::new_size;

	std::vector<Value*> ApplyPatchFullTest::patches;
	TemporaryFile* ApplyPatchFullTest::output_f;
	std::string ApplyPatchFullTest::output_loc;

	TEST_F(ApplyPatchTest, CheckModeSingle) {
	char* s = &old_sha1[0];
	ASSERT_EQ(0, applypatch_check(&old_file[0], 1, &s));
	}

	TEST_F(ApplyPatchTest, CheckModeMultiple) {
	char* argv[3] = {
	&bad_sha1_a[0],
	&old_sha1[0],
	&bad_sha1_b[0]
	};
	ASSERT_EQ(0, applypatch_check(&old_file[0], 3, argv));
	}

	TEST_F(ApplyPatchTest, CheckModeFailure) {
	char* argv[2] = {
	&bad_sha1_a[0],
	&bad_sha1_b[0]
	};
	ASSERT_NE(0, applypatch_check(&old_file[0], 2, argv));
	}

	TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedSingle) {
	mangle_file(old_file);
	char* s = &old_sha1[0];
	ASSERT_EQ(0, applypatch_check(&old_file[0], 1, &s));
	}

	TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedMultiple) {
	mangle_file(old_file);
	char* argv[3] = {
	&bad_sha1_a[0],
	&old_sha1[0],
	&bad_sha1_b[0]
	};
	ASSERT_EQ(0, applypatch_check(&old_file[0], 3, argv));
	}

	TEST_F(ApplyPatchCacheTest, CheckCacheCorruptedFailure) {
	mangle_file(old_file);
	char* argv[2] = {
	&bad_sha1_a[0],
	&bad_sha1_b[0]
	};
	ASSERT_NE(0, applypatch_check(&old_file[0], 2, argv));
	}

	TEST_F(ApplyPatchCacheTest, CheckCacheMissingSingle) {
	unlink(&old_file[0]);
	char* s = &old_sha1[0];
	ASSERT_EQ(0, applypatch_check(&old_file[0], 1, &s));
	}

	TEST_F(ApplyPatchCacheTest, CheckCacheMissingMultiple) {
	unlink(&old_file[0]);
	char* argv[3] = {
	&bad_sha1_a[0],
	&old_sha1[0],
	&bad_sha1_b[0]
	};
	ASSERT_EQ(0, applypatch_check(&old_file[0], 3, argv));
	}

	TEST_F(ApplyPatchCacheTest, CheckCacheMissingFailure) {
	unlink(&old_file[0]);
	char* argv[2] = {
	&bad_sha1_a[0],
	&bad_sha1_b[0]
	};
	ASSERT_NE(0, applypatch_check(&old_file[0], 2, argv));
	}

	TEST_F(ApplyPatchFullTest, ApplyInPlace) {
	std::vector<char*> sha1s;
	sha1s.push_back(&bad_sha1_a[0]);
	sha1s.push_back(&old_sha1[0]);

	int ap_result = applypatch(&old_file[0],
	"-",
	&new_sha1[0],
	new_size,
	2,
	sha1s.data(),
	patches.data(),
	nullptr);
	ASSERT_EQ(0, ap_result);
	ASSERT_TRUE(file_cmp(old_file, new_file));
	// reapply, applypatch is idempotent so it should succeed
	ap_result = applypatch(&old_file[0],
	"-",
	&new_sha1[0],
	new_size,
	2,
	sha1s.data(),
	patches.data(),
	nullptr);
	ASSERT_EQ(0, ap_result);
	ASSERT_TRUE(file_cmp(old_file, new_file));
	}

	TEST_F(ApplyPatchFullTest, ApplyInNewLocation) {
	std::vector<char*> sha1s;
	sha1s.push_back(&bad_sha1_a[0]);
	sha1s.push_back(&old_sha1[0]);
	int ap_result = applypatch(&old_file[0],
	&output_loc[0],
	&new_sha1[0],
	new_size,
	2,
	sha1s.data(),
	patches.data(),
	nullptr);
	ASSERT_EQ(0, ap_result);
	ASSERT_TRUE(file_cmp(output_loc, new_file));
	ap_result = applypatch(&old_file[0],
	&output_loc[0],
	&new_sha1[0],
	new_size,
	2,
	sha1s.data(),
	patches.data(),
	nullptr);
	ASSERT_EQ(0, ap_result);
	ASSERT_TRUE(file_cmp(output_loc, new_file));
	}

	TEST_F(ApplyPatchFullTest, ApplyCorruptedInNewLocation) {
	mangle_file(old_file);
	std::vector<char*> sha1s;
	sha1s.push_back(&bad_sha1_a[0]);
	sha1s.push_back(&old_sha1[0]);
	int ap_result = applypatch(&old_file[0],
	&output_loc[0],
	&new_sha1[0],
	new_size,
	2,
	sha1s.data(),
	patches.data(),
	nullptr);
	ASSERT_EQ(0, ap_result);
	ASSERT_TRUE(file_cmp(output_loc, new_file));
	ap_result = applypatch(&old_file[0],
	&output_loc[0],
	&new_sha1[0],
	new_size,
	2,
	sha1s.data(),
	patches.data(),
	nullptr);
	ASSERT_EQ(0, ap_result);
	ASSERT_TRUE(file_cmp(output_loc, new_file));
	}

	TEST_F(ApplyPatchDoubleCacheTest, ApplyDoubleCorruptedInNewLocation) {
	mangle_file(old_file);
	mangle_file(cache_file);

	std::vector<char*> sha1s;
	sha1s.push_back(&bad_sha1_a[0]);
	sha1s.push_back(&old_sha1[0]);
	int ap_result = applypatch(&old_file[0],
	&output_loc[0],
	&new_sha1[0],
	new_size,
	2,
	sha1s.data(),
	patches.data(),
	nullptr);
	ASSERT_NE(0, ap_result);
	ASSERT_FALSE(file_cmp(output_loc, new_file));
	ap_result = applypatch(&old_file[0],
	&output_loc[0],
	&new_sha1[0],
	new_size,
	2,
	sha1s.data(),
	patches.data(),
	nullptr);
	ASSERT_NE(0, ap_result);
	ASSERT_FALSE(file_cmp(output_loc, new_file));
	}