diff --git a/Android.mk b/Android.mk
index 9e374de..adf478f 100644
--- a/Android.mk
+++ b/Android.mk
@@ -55,6 +55,7 @@
 LOCAL_MODULE := librecovery
 LOCAL_STATIC_LIBRARIES := \
     libminui \
+    libvintf_recovery \
     libcrypto_utils \
     libcrypto \
     libbase
@@ -114,6 +115,9 @@
     libfs_mgr \
     libcrypto_utils \
     libcrypto \
+    libvintf_recovery \
+    libvintf \
+    libtinyxml2 \
     libbase \
     libcutils \
     libutils \
diff --git a/install.cpp b/install.cpp
index 6dcd356..e5a59b8 100644
--- a/install.cpp
+++ b/install.cpp
@@ -44,11 +44,11 @@
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
+#include <vintf/VintfObjectRecovery.h>
 #include <ziparchive/zip_archive.h>
 
 #include "common.h"
 #include "error_code.h"
-#include "minui/minui.h"
 #include "otautil/SysUtil.h"
 #include "otautil/ThermalUtil.h"
 #include "roots.h"
@@ -57,18 +57,9 @@
 
 using namespace std::chrono_literals;
 
-#define ASSUMED_UPDATE_BINARY_NAME  "META-INF/com/google/android/update-binary"
-static constexpr const char* AB_OTA_PAYLOAD_PROPERTIES = "payload_properties.txt";
-static constexpr const char* AB_OTA_PAYLOAD = "payload.bin";
-#define PUBLIC_KEYS_FILE "/res/keys"
-static constexpr const char* METADATA_PATH = "META-INF/com/android/metadata";
-static constexpr const char* UNCRYPT_STATUS = "/cache/recovery/uncrypt_status";
-
 // Default allocation of progress bar segments to operations
 static constexpr int VERIFICATION_PROGRESS_TIME = 60;
 static constexpr float VERIFICATION_PROGRESS_FRACTION = 0.25;
-static constexpr float DEFAULT_FILES_PROGRESS_FRACTION = 0.4;
-static constexpr float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1;
 
 static std::condition_variable finish_log_temperature;
 
@@ -87,62 +78,58 @@
     return -1;
 }
 
-bool read_metadata_from_package(ZipArchiveHandle zip, std::string* meta_data) {
-    ZipString metadata_path(METADATA_PATH);
-    ZipEntry meta_entry;
-    if (meta_data == nullptr) {
-        LOG(ERROR) << "string* meta_data can't be nullptr";
-        return false;
-    }
-    if (FindEntry(zip, metadata_path, &meta_entry) != 0) {
-        LOG(ERROR) << "Failed to find " << METADATA_PATH << " in update package";
-        return false;
-    }
+bool read_metadata_from_package(ZipArchiveHandle zip, std::string* metadata) {
+  CHECK(metadata != nullptr);
 
-    meta_data->resize(meta_entry.uncompressed_length, '\0');
-    if (ExtractToMemory(zip, &meta_entry, reinterpret_cast<uint8_t*>(&(*meta_data)[0]),
-                        meta_entry.uncompressed_length) != 0) {
-        LOG(ERROR) << "Failed to read metadata in update package";
-        return false;
-    }
-    return true;
+  static constexpr const char* METADATA_PATH = "META-INF/com/android/metadata";
+  ZipString path(METADATA_PATH);
+  ZipEntry entry;
+  if (FindEntry(zip, path, &entry) != 0) {
+    LOG(ERROR) << "Failed to find " << METADATA_PATH;
+    return false;
+  }
+
+  uint32_t length = entry.uncompressed_length;
+  metadata->resize(length, '\0');
+  int32_t err = ExtractToMemory(zip, &entry, reinterpret_cast<uint8_t*>(&(*metadata)[0]), length);
+  if (err != 0) {
+    LOG(ERROR) << "Failed to extract " << METADATA_PATH << ": " << ErrorCodeString(err);
+    return false;
+  }
+  return true;
 }
 
 // Read the build.version.incremental of src/tgt from the metadata and log it to last_install.
 static void read_source_target_build(ZipArchiveHandle zip, std::vector<std::string>& log_buffer) {
-    std::string meta_data;
-    if (!read_metadata_from_package(zip, &meta_data)) {
-        return;
+  std::string metadata;
+  if (!read_metadata_from_package(zip, &metadata)) {
+    return;
+  }
+  // Examples of the pre-build and post-build strings in metadata:
+  //   pre-build-incremental=2943039
+  //   post-build-incremental=2951741
+  std::vector<std::string> lines = android::base::Split(metadata, "\n");
+  for (const std::string& line : lines) {
+    std::string str = android::base::Trim(line);
+    if (android::base::StartsWith(str, "pre-build-incremental")) {
+      int source_build = parse_build_number(str);
+      if (source_build != -1) {
+        log_buffer.push_back(android::base::StringPrintf("source_build: %d", source_build));
+      }
+    } else if (android::base::StartsWith(str, "post-build-incremental")) {
+      int target_build = parse_build_number(str);
+      if (target_build != -1) {
+        log_buffer.push_back(android::base::StringPrintf("target_build: %d", target_build));
+      }
     }
-    // Examples of the pre-build and post-build strings in metadata:
-    // pre-build-incremental=2943039
-    // post-build-incremental=2951741
-    std::vector<std::string> lines = android::base::Split(meta_data, "\n");
-    for (const std::string& line : lines) {
-        std::string str = android::base::Trim(line);
-        if (android::base::StartsWith(str, "pre-build-incremental")){
-            int source_build = parse_build_number(str);
-            if (source_build != -1) {
-                log_buffer.push_back(android::base::StringPrintf("source_build: %d",
-                        source_build));
-            }
-        } else if (android::base::StartsWith(str, "post-build-incremental")) {
-            int target_build = parse_build_number(str);
-            if (target_build != -1) {
-                log_buffer.push_back(android::base::StringPrintf("target_build: %d",
-                        target_build));
-            }
-        }
-    }
+  }
 }
 
-// Extract the update binary from the open zip archive |zip| located at |path|
-// and store into |cmd| the command line that should be called. The |status_fd|
-// is the file descriptor the child process should use to report back the
-// progress of the update.
-static int
-update_binary_command(const char* path, ZipArchiveHandle zip, int retry_count,
-                      int status_fd, std::vector<std::string>* cmd);
+// Extract the update binary from the open zip archive |zip| located at |path| and store into |cmd|
+// the command line that should be called. The |status_fd| is the file descriptor the child process
+// should use to report back the progress of the update.
+int update_binary_command(const std::string& path, ZipArchiveHandle zip, int retry_count,
+                          int status_fd, std::vector<std::string>* cmd);
 
 #ifdef AB_OTA_UPDATER
 
@@ -224,87 +211,90 @@
   return 0;
 }
 
-static int
-update_binary_command(const char* path, ZipArchiveHandle zip, int retry_count,
-                      int status_fd, std::vector<std::string>* cmd)
-{
-    int ret = check_newer_ab_build(zip);
-    if (ret) {
-        return ret;
-    }
+int update_binary_command(const std::string& path, ZipArchiveHandle zip, int retry_count,
+                          int status_fd, std::vector<std::string>* cmd) {
+  CHECK(cmd != nullptr);
+  int ret = check_newer_ab_build(zip);
+  if (ret != 0) {
+    return ret;
+  }
 
-    // For A/B updates we extract the payload properties to a buffer and obtain
-    // the RAW payload offset in the zip file.
-    ZipString property_name(AB_OTA_PAYLOAD_PROPERTIES);
-    ZipEntry properties_entry;
-    if (FindEntry(zip, property_name, &properties_entry) != 0) {
-        LOG(ERROR) << "Can't find " << AB_OTA_PAYLOAD_PROPERTIES;
-        return INSTALL_CORRUPT;
-    }
-    std::vector<uint8_t> payload_properties(
-            properties_entry.uncompressed_length);
-    if (ExtractToMemory(zip, &properties_entry, payload_properties.data(),
-                        properties_entry.uncompressed_length) != 0) {
-        LOG(ERROR) << "Can't extract " << AB_OTA_PAYLOAD_PROPERTIES;
-        return INSTALL_CORRUPT;
-    }
+  // For A/B updates we extract the payload properties to a buffer and obtain the RAW payload offset
+  // in the zip file.
+  static constexpr const char* AB_OTA_PAYLOAD_PROPERTIES = "payload_properties.txt";
+  ZipString property_name(AB_OTA_PAYLOAD_PROPERTIES);
+  ZipEntry properties_entry;
+  if (FindEntry(zip, property_name, &properties_entry) != 0) {
+    LOG(ERROR) << "Failed to find " << AB_OTA_PAYLOAD_PROPERTIES;
+    return INSTALL_CORRUPT;
+  }
+  uint32_t properties_entry_length = properties_entry.uncompressed_length;
+  std::vector<uint8_t> payload_properties(properties_entry_length);
+  int32_t err =
+      ExtractToMemory(zip, &properties_entry, payload_properties.data(), properties_entry_length);
+  if (err != 0) {
+    LOG(ERROR) << "Failed to extract " << AB_OTA_PAYLOAD_PROPERTIES << ": " << ErrorCodeString(err);
+    return INSTALL_CORRUPT;
+  }
 
-    ZipString payload_name(AB_OTA_PAYLOAD);
-    ZipEntry payload_entry;
-    if (FindEntry(zip, payload_name, &payload_entry) != 0) {
-        LOG(ERROR) << "Can't find " << AB_OTA_PAYLOAD;
-        return INSTALL_CORRUPT;
-    }
-    long payload_offset = payload_entry.offset;
-    *cmd = {
-        "/sbin/update_engine_sideload",
-        android::base::StringPrintf("--payload=file://%s", path),
-        android::base::StringPrintf("--offset=%ld", payload_offset),
-        "--headers=" + std::string(payload_properties.begin(),
-                                   payload_properties.end()),
-        android::base::StringPrintf("--status_fd=%d", status_fd),
-    };
-    return 0;
+  static constexpr const char* AB_OTA_PAYLOAD = "payload.bin";
+  ZipString payload_name(AB_OTA_PAYLOAD);
+  ZipEntry payload_entry;
+  if (FindEntry(zip, payload_name, &payload_entry) != 0) {
+    LOG(ERROR) << "Failed to find " << AB_OTA_PAYLOAD;
+    return INSTALL_CORRUPT;
+  }
+  long payload_offset = payload_entry.offset;
+  *cmd = {
+    "/sbin/update_engine_sideload",
+    "--payload=file://" + path,
+    android::base::StringPrintf("--offset=%ld", payload_offset),
+    "--headers=" + std::string(payload_properties.begin(), payload_properties.end()),
+    android::base::StringPrintf("--status_fd=%d", status_fd),
+  };
+  return 0;
 }
 
 #else  // !AB_OTA_UPDATER
 
-static int
-update_binary_command(const char* path, ZipArchiveHandle zip, int retry_count,
-                      int status_fd, std::vector<std::string>* cmd)
-{
-    // On traditional updates we extract the update binary from the package.
-    ZipString binary_name(ASSUMED_UPDATE_BINARY_NAME);
-    ZipEntry binary_entry;
-    if (FindEntry(zip, binary_name, &binary_entry) != 0) {
-        return INSTALL_CORRUPT;
-    }
+int update_binary_command(const std::string& path, ZipArchiveHandle zip, int retry_count,
+                          int status_fd, std::vector<std::string>* cmd) {
+  CHECK(cmd != nullptr);
 
-    const char* binary = "/tmp/update_binary";
-    unlink(binary);
-    int fd = creat(binary, 0755);
-    if (fd < 0) {
-        PLOG(ERROR) << "Can't make " << binary;
-        return INSTALL_ERROR;
-    }
-    int error = ExtractEntryToFile(zip, &binary_entry, fd);
-    close(fd);
+  // On traditional updates we extract the update binary from the package.
+  static constexpr const char* UPDATE_BINARY_NAME = "META-INF/com/google/android/update-binary";
+  ZipString binary_name(UPDATE_BINARY_NAME);
+  ZipEntry binary_entry;
+  if (FindEntry(zip, binary_name, &binary_entry) != 0) {
+    LOG(ERROR) << "Failed to find update binary " << UPDATE_BINARY_NAME;
+    return INSTALL_CORRUPT;
+  }
 
-    if (error != 0) {
-        LOG(ERROR) << "Can't copy " << ASSUMED_UPDATE_BINARY_NAME
-                   << " : " << ErrorCodeString(error);
-        return INSTALL_ERROR;
-    }
+  const char* binary = "/tmp/update_binary";
+  unlink(binary);
+  int fd = creat(binary, 0755);
+  if (fd == -1) {
+    PLOG(ERROR) << "Failed to create " << binary;
+    return INSTALL_ERROR;
+  }
 
-    *cmd = {
-        binary,
-        EXPAND(RECOVERY_API_VERSION),   // defined in Android.mk
-        std::to_string(status_fd),
-        path,
-    };
-    if (retry_count > 0)
-        cmd->push_back("retry");
-    return 0;
+  int32_t error = ExtractEntryToFile(zip, &binary_entry, fd);
+  close(fd);
+  if (error != 0) {
+    LOG(ERROR) << "Failed to extract " << UPDATE_BINARY_NAME << ": " << ErrorCodeString(error);
+    return INSTALL_ERROR;
+  }
+
+  *cmd = {
+    binary,
+    EXPAND(RECOVERY_API_VERSION),  // defined in Android.mk
+    std::to_string(status_fd),
+    path,
+  };
+  if (retry_count > 0) {
+    cmd->push_back("retry");
+  }
+  return 0;
 }
 #endif  // !AB_OTA_UPDATER
 
@@ -546,10 +536,15 @@
   }
   CloseArchive(zip_handle);
 
-  // TODO(b/36814503): Enable the actual verification when VintfObject::CheckCompatibility() lands.
-  // VintfObject::CheckCompatibility returns zero on success.
-  // return (android::vintf::VintfObject::CheckCompatibility(compatibility_info, true) == 0);
-  return true;
+  // VintfObjectRecovery::CheckCompatibility returns zero on success.
+  std::string err;
+  int result = android::vintf::VintfObjectRecovery::CheckCompatibility(compatibility_info, &err);
+  if (result == 0) {
+    return true;
+  }
+
+  LOG(ERROR) << "Failed to verify package compatibility (result " << result << "): " << err;
+  return false;
 }
 
 static int
@@ -601,7 +596,6 @@
 
     // Additionally verify the compatibility of the package.
     if (!verify_package_compatibility(zip)) {
-      LOG(ERROR) << "Failed to verify package compatibility";
       log_buffer.push_back(android::base::StringPrintf("error: %d", kPackageCompatibilityFailure));
       sysReleaseMap(&map);
       CloseArchive(zip);
@@ -623,80 +617,80 @@
     return result;
 }
 
-int
-install_package(const char* path, bool* wipe_cache, const char* install_file,
-                bool needs_mount, int retry_count)
-{
-    modified_flash = true;
-    auto start = std::chrono::system_clock::now();
+int install_package(const char* path, bool* wipe_cache, const char* install_file, bool needs_mount,
+                    int retry_count) {
+  modified_flash = true;
+  auto start = std::chrono::system_clock::now();
 
-    int start_temperature = GetMaxValueFromThermalZone();
-    int max_temperature = start_temperature;
+  int start_temperature = GetMaxValueFromThermalZone();
+  int max_temperature = start_temperature;
 
-    int result;
-    std::vector<std::string> log_buffer;
-    if (setup_install_mounts() != 0) {
-        LOG(ERROR) << "failed to set up expected mounts for install; aborting";
-        result = INSTALL_ERROR;
+  int result;
+  std::vector<std::string> log_buffer;
+  if (setup_install_mounts() != 0) {
+    LOG(ERROR) << "failed to set up expected mounts for install; aborting";
+    result = INSTALL_ERROR;
+  } else {
+    result = really_install_package(path, wipe_cache, needs_mount, log_buffer, retry_count,
+                                    &max_temperature);
+  }
+
+  // Measure the time spent to apply OTA update in seconds.
+  std::chrono::duration<double> duration = std::chrono::system_clock::now() - start;
+  int time_total = static_cast<int>(duration.count());
+
+  bool has_cache = volume_for_path("/cache") != nullptr;
+  // Skip logging the uncrypt_status on devices without /cache.
+  if (has_cache) {
+    static constexpr const char* UNCRYPT_STATUS = "/cache/recovery/uncrypt_status";
+    if (ensure_path_mounted(UNCRYPT_STATUS) != 0) {
+      LOG(WARNING) << "Can't mount " << UNCRYPT_STATUS;
     } else {
-        result = really_install_package(path, wipe_cache, needs_mount, log_buffer, retry_count,
-                                        &max_temperature);
-    }
-
-    // Measure the time spent to apply OTA update in seconds.
-    std::chrono::duration<double> duration = std::chrono::system_clock::now() - start;
-    int time_total = static_cast<int>(duration.count());
-
-    bool has_cache = volume_for_path("/cache") != nullptr;
-    // Skip logging the uncrypt_status on devices without /cache.
-    if (has_cache) {
-      if (ensure_path_mounted(UNCRYPT_STATUS) != 0) {
-        LOG(WARNING) << "Can't mount " << UNCRYPT_STATUS;
+      std::string uncrypt_status;
+      if (!android::base::ReadFileToString(UNCRYPT_STATUS, &uncrypt_status)) {
+        PLOG(WARNING) << "failed to read uncrypt status";
+      } else if (!android::base::StartsWith(uncrypt_status, "uncrypt_")) {
+        LOG(WARNING) << "corrupted uncrypt_status: " << uncrypt_status;
       } else {
-        std::string uncrypt_status;
-        if (!android::base::ReadFileToString(UNCRYPT_STATUS, &uncrypt_status)) {
-          PLOG(WARNING) << "failed to read uncrypt status";
-        } else if (!android::base::StartsWith(uncrypt_status, "uncrypt_")) {
-          LOG(WARNING) << "corrupted uncrypt_status: " << uncrypt_status;
-        } else {
-          log_buffer.push_back(android::base::Trim(uncrypt_status));
-        }
+        log_buffer.push_back(android::base::Trim(uncrypt_status));
       }
     }
+  }
 
-    // The first two lines need to be the package name and install result.
-    std::vector<std::string> log_header = {
-        path,
-        result == INSTALL_SUCCESS ? "1" : "0",
-        "time_total: " + std::to_string(time_total),
-        "retry: " + std::to_string(retry_count),
-    };
+  // The first two lines need to be the package name and install result.
+  std::vector<std::string> log_header = {
+    path,
+    result == INSTALL_SUCCESS ? "1" : "0",
+    "time_total: " + std::to_string(time_total),
+    "retry: " + std::to_string(retry_count),
+  };
 
-    int end_temperature = GetMaxValueFromThermalZone();
-    max_temperature = std::max(end_temperature, max_temperature);
-    if (start_temperature > 0) {
-      log_buffer.push_back("temperature_start: " + std::to_string(start_temperature));
-    }
-    if (end_temperature > 0) {
-      log_buffer.push_back("temperature_end: " + std::to_string(end_temperature));
-    }
-    if (max_temperature > 0) {
-      log_buffer.push_back("temperature_max: " + std::to_string(max_temperature));
-    }
+  int end_temperature = GetMaxValueFromThermalZone();
+  max_temperature = std::max(end_temperature, max_temperature);
+  if (start_temperature > 0) {
+    log_buffer.push_back("temperature_start: " + std::to_string(start_temperature));
+  }
+  if (end_temperature > 0) {
+    log_buffer.push_back("temperature_end: " + std::to_string(end_temperature));
+  }
+  if (max_temperature > 0) {
+    log_buffer.push_back("temperature_max: " + std::to_string(max_temperature));
+  }
 
-    std::string log_content = android::base::Join(log_header, "\n") + "\n" +
-            android::base::Join(log_buffer, "\n") + "\n";
-    if (!android::base::WriteStringToFile(log_content, install_file)) {
-        PLOG(ERROR) << "failed to write " << install_file;
-    }
+  std::string log_content =
+      android::base::Join(log_header, "\n") + "\n" + android::base::Join(log_buffer, "\n") + "\n";
+  if (!android::base::WriteStringToFile(log_content, install_file)) {
+    PLOG(ERROR) << "failed to write " << install_file;
+  }
 
-    // Write a copy into last_log.
-    LOG(INFO) << log_content;
+  // Write a copy into last_log.
+  LOG(INFO) << log_content;
 
-    return result;
+  return result;
 }
 
 bool verify_package(const unsigned char* package_data, size_t package_size) {
+  static constexpr const char* PUBLIC_KEYS_FILE = "/res/keys";
   std::vector<Certificate> loadedKeys;
   if (!load_keys(PUBLIC_KEYS_FILE, loadedKeys)) {
     LOG(ERROR) << "Failed to load keys";
diff --git a/minadbd/minadbd_services.cpp b/minadbd/minadbd_services.cpp
index a6aa321..61c06cc 100644
--- a/minadbd/minadbd_services.cpp
+++ b/minadbd/minadbd_services.cpp
@@ -21,6 +21,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include <string>
 #include <thread>
 
 #include "adb.h"
@@ -28,33 +29,30 @@
 #include "fuse_adb_provider.h"
 #include "sysdeps.h"
 
-static void sideload_host_service(int sfd, void* data) {
-    char* args = reinterpret_cast<char*>(data);
+static void sideload_host_service(int sfd, const std::string& args) {
     int file_size;
     int block_size;
-    if (sscanf(args, "%d:%d", &file_size, &block_size) != 2) {
-        printf("bad sideload-host arguments: %s\n", args);
+    if (sscanf(args.c_str(), "%d:%d", &file_size, &block_size) != 2) {
+        printf("bad sideload-host arguments: %s\n", args.c_str());
         exit(1);
     }
-    free(args);
 
     printf("sideload-host file size %d block size %d\n", file_size, block_size);
 
     int result = run_adb_fuse(sfd, file_size, block_size);
 
     printf("sideload_host finished\n");
-    sleep(1);
     exit(result == 0 ? 0 : 1);
 }
 
-static int create_service_thread(void (*func)(int, void *), void *cookie) {
+static int create_service_thread(void (*func)(int, const std::string&), const std::string& args) {
     int s[2];
     if (adb_socketpair(s)) {
         printf("cannot create service socket pair\n");
         return -1;
     }
 
-    std::thread([s, func, cookie]() { func(s[1], cookie); }).detach();
+    std::thread([s, func, args]() { func(s[1], args); }).detach();
 
     VLOG(SERVICES) << "service thread started, " << s[0] << ":" << s[1];
     return s[0];
@@ -69,7 +67,7 @@
         // sideload-host).
         exit(3);
     } else if (!strncmp(name, "sideload-host:", 14)) {
-        char* arg = strdup(name + 14);
+        std::string arg(name + 14);
         ret = create_service_thread(sideload_host_service, arg);
     }
     if (ret >= 0) {
diff --git a/private/install.h b/private/install.h
new file mode 100644
index 0000000..12d303b
--- /dev/null
+++ b/private/install.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+// Private headers exposed for testing purpose only.
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include <ziparchive/zip_archive.h>
+
+int update_binary_command(const std::string& path, ZipArchiveHandle zip, int retry_count,
+                          int status_fd, std::vector<std::string>* cmd);
diff --git a/tests/Android.mk b/tests/Android.mk
index a1f0d48..e526630 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -85,6 +85,10 @@
     -Werror \
     -D_FILE_OFFSET_BITS=64
 
+ifeq ($(AB_OTA_UPDATER),true)
+LOCAL_CFLAGS += -DAB_OTA_UPDATER=1
+endif
+
 LOCAL_MODULE := recovery_component_test
 LOCAL_COMPATIBILITY_SUITE := device-tests
 LOCAL_C_INCLUDES := bootable/recovery
@@ -128,6 +132,9 @@
     libdivsufsort64 \
     libfs_mgr \
     liblog \
+    libvintf_recovery \
+    libvintf \
+    libtinyxml2 \
     libselinux \
     libext4_utils \
     libsparse \
diff --git a/tests/component/install_test.cpp b/tests/component/install_test.cpp
index 3b6fbc3..2143dd7 100644
--- a/tests/component/install_test.cpp
+++ b/tests/component/install_test.cpp
@@ -16,12 +16,18 @@
 
 #include <stdio.h>
 
+#include <string>
+#include <vector>
+
+#include <android-base/properties.h>
+#include <android-base/strings.h>
 #include <android-base/test_utils.h>
 #include <gtest/gtest.h>
 #include <ziparchive/zip_archive.h>
 #include <ziparchive/zip_writer.h>
 
 #include "install.h"
+#include "private/install.h"
 
 TEST(InstallTest, verify_package_compatibility_no_entry) {
   TemporaryFile temp_file;
@@ -55,3 +61,134 @@
   ASSERT_FALSE(verify_package_compatibility(zip));
   CloseArchive(zip);
 }
+
+TEST(InstallTest, read_metadata_from_package_smoke) {
+  TemporaryFile temp_file;
+  FILE* zip_file = fdopen(temp_file.fd, "w");
+  ZipWriter writer(zip_file);
+  ASSERT_EQ(0, writer.StartEntry("META-INF/com/android/metadata", kCompressStored));
+  const std::string content("abcdefg");
+  ASSERT_EQ(0, writer.WriteBytes(content.data(), content.size()));
+  ASSERT_EQ(0, writer.FinishEntry());
+  ASSERT_EQ(0, writer.Finish());
+  ASSERT_EQ(0, fclose(zip_file));
+
+  ZipArchiveHandle zip;
+  ASSERT_EQ(0, OpenArchive(temp_file.path, &zip));
+  std::string metadata;
+  ASSERT_TRUE(read_metadata_from_package(zip, &metadata));
+  ASSERT_EQ(content, metadata);
+  CloseArchive(zip);
+
+  TemporaryFile temp_file2;
+  FILE* zip_file2 = fdopen(temp_file2.fd, "w");
+  ZipWriter writer2(zip_file2);
+  ASSERT_EQ(0, writer2.StartEntry("META-INF/com/android/metadata", kCompressDeflated));
+  ASSERT_EQ(0, writer2.WriteBytes(content.data(), content.size()));
+  ASSERT_EQ(0, writer2.FinishEntry());
+  ASSERT_EQ(0, writer2.Finish());
+  ASSERT_EQ(0, fclose(zip_file2));
+
+  ASSERT_EQ(0, OpenArchive(temp_file2.path, &zip));
+  metadata.clear();
+  ASSERT_TRUE(read_metadata_from_package(zip, &metadata));
+  ASSERT_EQ(content, metadata);
+  CloseArchive(zip);
+}
+
+TEST(InstallTest, read_metadata_from_package_no_entry) {
+  TemporaryFile temp_file;
+  FILE* zip_file = fdopen(temp_file.fd, "w");
+  ZipWriter writer(zip_file);
+  ASSERT_EQ(0, writer.StartEntry("dummy_entry", kCompressStored));
+  ASSERT_EQ(0, writer.FinishEntry());
+  ASSERT_EQ(0, writer.Finish());
+  ASSERT_EQ(0, fclose(zip_file));
+
+  ZipArchiveHandle zip;
+  ASSERT_EQ(0, OpenArchive(temp_file.path, &zip));
+  std::string metadata;
+  ASSERT_FALSE(read_metadata_from_package(zip, &metadata));
+  CloseArchive(zip);
+}
+
+TEST(InstallTest, update_binary_command_smoke) {
+#ifdef AB_OTA_UPDATER
+  TemporaryFile temp_file;
+  FILE* zip_file = fdopen(temp_file.fd, "w");
+  ZipWriter writer(zip_file);
+  ASSERT_EQ(0, writer.StartEntry("payload.bin", kCompressStored));
+  ASSERT_EQ(0, writer.FinishEntry());
+  ASSERT_EQ(0, writer.StartEntry("payload_properties.txt", kCompressStored));
+  const std::string properties = "some_properties";
+  ASSERT_EQ(0, writer.WriteBytes(properties.data(), properties.size()));
+  ASSERT_EQ(0, writer.FinishEntry());
+  // A metadata entry is mandatory.
+  ASSERT_EQ(0, writer.StartEntry("META-INF/com/android/metadata", kCompressStored));
+  std::string device = android::base::GetProperty("ro.product.device", "");
+  ASSERT_NE("", device);
+  std::string timestamp = android::base::GetProperty("ro.build.date.utc", "");
+  ASSERT_NE("", timestamp);
+  std::string metadata = android::base::Join(
+      std::vector<std::string>{
+          "ota-type=AB", "pre-device=" + device, "post-timestamp=" + timestamp,
+      },
+      "\n");
+  ASSERT_EQ(0, writer.WriteBytes(metadata.data(), metadata.size()));
+  ASSERT_EQ(0, writer.FinishEntry());
+  ASSERT_EQ(0, writer.Finish());
+  ASSERT_EQ(0, fclose(zip_file));
+
+  ZipArchiveHandle zip;
+  ASSERT_EQ(0, OpenArchive(temp_file.path, &zip));
+  int status_fd = 10;
+  std::string path = "/path/to/update.zip";
+  std::vector<std::string> cmd;
+  ASSERT_EQ(0, update_binary_command(path, zip, 0, status_fd, &cmd));
+  ASSERT_EQ("/sbin/update_engine_sideload", cmd[0]);
+  ASSERT_EQ("--payload=file://" + path, cmd[1]);
+  ASSERT_EQ("--headers=" + properties, cmd[3]);
+  ASSERT_EQ("--status_fd=" + std::to_string(status_fd), cmd[4]);
+  CloseArchive(zip);
+#else
+  // Cannot test update_binary_command() because it tries to extract update-binary to /tmp.
+  GTEST_LOG_(INFO) << "Test skipped on non-A/B device.";
+#endif  // AB_OTA_UPDATER
+}
+
+TEST(InstallTest, update_binary_command_invalid) {
+#ifdef AB_OTA_UPDATER
+  TemporaryFile temp_file;
+  FILE* zip_file = fdopen(temp_file.fd, "w");
+  ZipWriter writer(zip_file);
+  // Missing payload_properties.txt.
+  ASSERT_EQ(0, writer.StartEntry("payload.bin", kCompressStored));
+  ASSERT_EQ(0, writer.FinishEntry());
+  // A metadata entry is mandatory.
+  ASSERT_EQ(0, writer.StartEntry("META-INF/com/android/metadata", kCompressStored));
+  std::string device = android::base::GetProperty("ro.product.device", "");
+  ASSERT_NE("", device);
+  std::string timestamp = android::base::GetProperty("ro.build.date.utc", "");
+  ASSERT_NE("", timestamp);
+  std::string metadata = android::base::Join(
+      std::vector<std::string>{
+          "ota-type=AB", "pre-device=" + device, "post-timestamp=" + timestamp,
+      },
+      "\n");
+  ASSERT_EQ(0, writer.WriteBytes(metadata.data(), metadata.size()));
+  ASSERT_EQ(0, writer.FinishEntry());
+  ASSERT_EQ(0, writer.Finish());
+  ASSERT_EQ(0, fclose(zip_file));
+
+  ZipArchiveHandle zip;
+  ASSERT_EQ(0, OpenArchive(temp_file.path, &zip));
+  int status_fd = 10;
+  std::string path = "/path/to/update.zip";
+  std::vector<std::string> cmd;
+  ASSERT_EQ(INSTALL_CORRUPT, update_binary_command(path, zip, 0, status_fd, &cmd));
+  CloseArchive(zip);
+#else
+  // Cannot test update_binary_command() because it tries to extract update-binary to /tmp.
+  GTEST_LOG_(INFO) << "Test skipped on non-A/B device.";
+#endif  // AB_OTA_UPDATER
+}