fuzzer_test_support.cc

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/i18n/icu_util.h"
#include "base/logging.h"
#include "base/test/scoped_run_loop_timeout.h"
#include "base/test/task_environment.h"
#include "base/test/test_timeouts.h"

namespace {

// Set up globals that a number of network tests use.
//
// Note that in general static initializers are not allowed, however this is
// just being used by test code.
struct InitGlobals {
  InitGlobals() {
    base::CommandLine::Init(0, nullptr);

    // |test| instances uses TaskEnvironment, which needs TestTimeouts.
    TestTimeouts::Initialize();

    task_environment = std::make_unique<base::test::TaskEnvironment>(
        base::test::TaskEnvironment::MainThreadType::IO);

    increased_timeout_ = std::make_unique<base::test::ScopedRunLoopTimeout>(
        FROM_HERE, TestTimeouts::action_max_timeout());

    // Set up ICU. ICU is used internally by GURL, which is used throughout the
    // //net code. Initializing ICU is important to prevent fuzztests from
    // asserting when handling non-ASCII urls.
    CHECK(base::i18n::InitializeICU());

    // Disable noisy logging as per "libFuzzer in Chrome" documentation:
    // testing/libfuzzer/getting_started.md#Disable-noisy-error-message-logging.
    logging::SetMinLogLevel(logging::LOG_FATAL);
  }

  // A number of tests use async code which depends on there being a
  // TaskEnvironment.  Setting one up here allows tests to reuse the
  // TaskEnvironment between runs.
  std::unique_ptr<base::test::TaskEnvironment> task_environment;

  // Fuzzing tests often need to Run() for longer than action_timeout().
  std::unique_ptr<base::test::ScopedRunLoopTimeout> increased_timeout_;

  base::AtExitManager at_exit_manager;
};

InitGlobals* init_globals = new InitGlobals();

}  // namespace