// Copyright (c) 2011 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 "content/common/sandbox_mac_unittest_helper.h"

extern "C" {
#include <sandbox.h>
}

#include <map>
#include <memory>

#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/process/kill.h"
#include "content/test/test_content_client.h"
#include "services/service_manager/sandbox/mac/sandbox_mac.h"
#include "services/service_manager/sandbox/sandbox_type.h"
#include "testing/multiprocess_func_list.h"

namespace content {
namespace {

const char* kSandboxTypeKey = "CHROMIUM_SANDBOX_SANDBOX_TYPE";
const char* kSandboxTestNameKey = "CHROMIUM_SANDBOX_TEST_NAME";
const char* kTestDataKey = "CHROMIUM_SANDBOX_USER_DATA";

}  // namespace

// Support infrastructure for REGISTER_SANDBOX_TEST_CASE macro.
namespace internal {

typedef std::map<std::string,MacSandboxTestCase*> SandboxTestMap;

// A function that returns a common map from string -> test case class.
SandboxTestMap& GetSandboxTestMap() {
  static SandboxTestMap test_map;
  return test_map;
}

void AddSandboxTestCase(const char* test_name, MacSandboxTestCase* test_class) {
  SandboxTestMap& test_map = GetSandboxTestMap();
  if (test_map.find(test_name) != test_map.end()) {
    LOG(ERROR) << "Trying to register duplicate test" << test_name;
    NOTREACHED();
  }
  test_map[test_name] = test_class;
}

}  // namespace internal

bool MacSandboxTest::RunTestInAllSandboxTypes(const char* test_name,
                                              const char* test_data) {
  // Go through all the sandbox types, and run the test case in each of them
  // if one fails, abort.
  for (int i = static_cast<int>(service_manager::SANDBOX_TYPE_FIRST_TYPE);
       i < service_manager::SANDBOX_TYPE_AFTER_LAST_TYPE; ++i) {
    if (service_manager::IsUnsandboxedSandboxType(
            static_cast<service_manager::SandboxType>(i))) {
      continue;
    }
    if (!RunTestInSandbox(static_cast<service_manager::SandboxType>(i),
                          test_name, test_data)) {
      LOG(ERROR) << "Sandboxed test (" << test_name << ")"
                 << "Failed in sandbox type " << i << "user data: ("
                 << test_data << ")";
      return false;
    }
  }
  return true;
}

bool MacSandboxTest::RunTestInSandbox(service_manager::SandboxType sandbox_type,
                                      const char* test_name,
                                      const char* test_data) {
  std::stringstream s;
  s << static_cast<int>(static_cast<int>(sandbox_type));
  setenv(kSandboxTypeKey, s.str().c_str(), 1);
  setenv(kSandboxTestNameKey, test_name, 1);
  if (test_data)
    setenv(kTestDataKey, test_data, 1);

  base::Process child_process = SpawnChild("mac_sandbox_test_runner");
  if (!child_process.IsValid()) {
    LOG(WARNING) << "SpawnChild failed";
    return false;
  }
  int code = -1;
  if (!child_process.WaitForExit(&code)) {
    LOG(WARNING) << "Process::WaitForExit failed";
    return false;
  }
  return code == 0;
}

bool MacSandboxTestCase::BeforeSandboxInit() {
  return true;
}

void MacSandboxTestCase::SetTestData(const char* test_data) {
  test_data_ = test_data;
}

// Given a test name specified by |name| return that test case.
// If no test case is found for the given name, return NULL.
MacSandboxTestCase *SandboxTestForName(const char* name) {
  using internal::SandboxTestMap;
  using internal::GetSandboxTestMap;

  SandboxTestMap all_tests = GetSandboxTestMap();

  SandboxTestMap::iterator it = all_tests.find(name);
  if (it == all_tests.end()) {
    LOG(ERROR) << "Couldn't find sandbox test case(" << name << ")";
    return NULL;
  }

  return it->second;
}

// Main function for driver process that enables the sandbox and runs test
// code.
MULTIPROCESS_TEST_MAIN(mac_sandbox_test_runner) {
  TestContentClient content_client;
  SetContentClient(&content_client);
  // Extract parameters.
  char* sandbox_type_str = getenv(kSandboxTypeKey);
  if (!sandbox_type_str) {
    LOG(ERROR) << "Sandbox type not specified";
    return -1;
  }
  auto sandbox_type =
      static_cast<service_manager::SandboxType>(atoi(sandbox_type_str));
  char* sandbox_test_name = getenv(kSandboxTestNameKey);
  if (!sandbox_test_name) {
    LOG(ERROR) << "Sandbox test name not specified";
    return -1;
  }

  const char* test_data = getenv(kTestDataKey);

  // Find Test Function to run;
  std::unique_ptr<MacSandboxTestCase> test_case(
      SandboxTestForName(sandbox_test_name));
  if (!test_case) {
    LOG(ERROR) << "Invalid sandbox test name (" << sandbox_test_name << ")";
    return -1;
  }
  if (test_data)
    test_case->SetTestData(test_data);

  // Run Test.
  if (!test_case->BeforeSandboxInit()) {
    LOG(ERROR) << sandbox_test_name << "Failed test before sandbox init";
    return -1;
  }

  service_manager::SandboxMac::Warmup(sandbox_type);
  if (!service_manager::SandboxMac::Enable(sandbox_type, base::FilePath())) {
    LOG(ERROR) << "Failed to initialize sandbox " << sandbox_type;
    return -1;
  }

  if (!test_case->SandboxedTest()) {
    LOG(ERROR) << sandbox_test_name << "Failed sandboxed test";
    return -1;
  }

  return 0;
}

}  // namespace content