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dart_lifecycle_unittests.cc
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dart_lifecycle_unittests.cc
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// Copyright 2013 The Flutter 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 "flutter/common/task_runners.h"
#include "flutter/fml/paths.h"
#include "flutter/fml/synchronization/count_down_latch.h"
#include "flutter/fml/synchronization/waitable_event.h"
#include "flutter/runtime/dart_vm.h"
#include "flutter/runtime/dart_vm_lifecycle.h"
#include "flutter/runtime/isolate_configuration.h"
#include "flutter/testing/fixture_test.h"
namespace flutter {
namespace testing {
using DartLifecycleTest = FixtureTest;
TEST_F(DartLifecycleTest, CanStartAndShutdownVM) {
auto settings = CreateSettingsForFixture();
settings.leak_vm = false;
settings.enable_observatory = false;
ASSERT_FALSE(DartVMRef::IsInstanceRunning());
{
auto vm_ref = DartVMRef::Create(settings);
ASSERT_TRUE(DartVMRef::IsInstanceRunning());
}
ASSERT_FALSE(DartVMRef::IsInstanceRunning());
}
TEST_F(DartLifecycleTest, CanStartAndShutdownVMOverAndOver) {
auto settings = CreateSettingsForFixture();
settings.leak_vm = false;
settings.enable_observatory = false;
ASSERT_FALSE(DartVMRef::IsInstanceRunning());
auto count = DartVM::GetVMLaunchCount();
for (size_t i = 0; i < 10; i++) {
auto vm_ref = DartVMRef::Create(settings);
ASSERT_TRUE(DartVMRef::IsInstanceRunning());
ASSERT_EQ(DartVM::GetVMLaunchCount(), count + 1);
count = DartVM::GetVMLaunchCount();
}
ASSERT_FALSE(DartVMRef::IsInstanceRunning());
}
static std::shared_ptr<DartIsolate> CreateAndRunRootIsolate(
const Settings& settings,
const DartVMData& vm,
fml::RefPtr<fml::TaskRunner> task_runner,
std::string entrypoint) {
FML_CHECK(!entrypoint.empty());
TaskRunners runners("io.flutter.test", task_runner, task_runner, task_runner,
task_runner);
auto isolate_configuration =
IsolateConfiguration::InferFromSettings(settings);
UIDartState::Context context(runners);
context.advisory_script_uri = "main.dart";
context.advisory_script_entrypoint = entrypoint.c_str();
auto isolate =
DartIsolate::CreateRunningRootIsolate(
vm.GetSettings(), // settings
vm.GetIsolateSnapshot(), // isolate_snapshot
{}, // platform configuration
DartIsolate::Flags{}, // flags
nullptr, // root isolate create callback
settings.isolate_create_callback, // isolate create callback
settings.isolate_shutdown_callback, // isolate shutdown callback,
entrypoint, // dart entrypoint
std::nullopt, // dart entrypoint library
{}, // dart entrypoint arguments
std::move(isolate_configuration), // isolate configuration
std::move(context) // engine context
)
.lock();
if (!isolate) {
FML_LOG(ERROR) << "Could not launch the root isolate.";
return nullptr;
}
return isolate;
}
// TODO(chinmaygarde): This unit-test is flaky and indicates thread un-safety
// during shutdown. https://github.com/flutter/flutter/issues/36782
TEST_F(DartLifecycleTest, DISABLED_ShuttingDownTheVMShutsDownAllIsolates) {
auto settings = CreateSettingsForFixture();
settings.leak_vm = false;
// Make sure the service protocol launches
settings.enable_observatory = true;
auto thread_task_runner = CreateNewThread();
for (size_t i = 0; i < 3; i++) {
ASSERT_FALSE(DartVMRef::IsInstanceRunning());
const auto last_launch_count = DartVM::GetVMLaunchCount();
auto vm_ref = DartVMRef::Create(settings);
ASSERT_TRUE(DartVMRef::IsInstanceRunning());
ASSERT_EQ(last_launch_count + 1, DartVM::GetVMLaunchCount());
const size_t isolate_count = 5;
fml::CountDownLatch latch(isolate_count);
auto vm_data = vm_ref.GetVMData();
for (size_t i = 0; i < isolate_count; ++i) {
thread_task_runner->PostTask(
[vm_data, &settings, &latch, thread_task_runner]() {
ASSERT_TRUE(CreateAndRunRootIsolate(settings, *vm_data.get(),
thread_task_runner,
"testIsolateShutdown"));
latch.CountDown();
});
}
latch.Wait();
}
ASSERT_FALSE(DartVMRef::IsInstanceRunning());
}
} // namespace testing
} // namespace flutter