src/dawn/node/test/V8TestEnvironment.cpp

// Copyright 2026 The Dawn & Tint Authors
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#include "src/dawn/node/test/V8TestEnvironment.h"

#include <memory>

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundef"
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
#include "libplatform/libplatform.h"
#pragma clang diagnostic pop

namespace dawn::node::test {

namespace {

std::unique_ptr<v8::Platform> g_platform;

// Brings V8 up before the first test and takes it down after the last.
class V8Environment : public ::testing::Environment {
  public:
    ~V8Environment() override = default;

    void SetUp() override {
        v8::V8::SetFlagsFromString("--expose_gc");
        g_platform = v8::platform::NewDefaultPlatform();
        v8::V8::InitializePlatform(g_platform.get());
        v8::V8::Initialize();
    }

    void TearDown() override {
        v8::V8::Dispose();
        v8::V8::DisposePlatform();
        g_platform.reset();
    }
};

testing::Environment* const v8_env = testing::AddGlobalTestEnvironment(new V8Environment);

}  // namespace

v8::Platform* V8Platform() {
    return g_platform.get();
}

void V8IsolateTest::SetUp() {
    allocator_.reset(v8::ArrayBuffer::Allocator::NewDefaultAllocator());
    create_params_.array_buffer_allocator = allocator_.get();
    isolate_ = v8::Isolate::New(create_params_);
    isolate_->SetMicrotasksPolicy(microtasks_policy_);
    isolate_->Enter();

    // Every local handle a test creates lands in this scope, which outlives the test body.
    handle_scope_.emplace(isolate_);
    v8::Context::New(isolate_)->Enter();
}

void V8IsolateTest::TearDown() {
    context()->Exit();
    handle_scope_.reset();
    isolate_->Exit();
    isolate_->Dispose();
    allocator_.reset();
}

}  // namespace dawn::node::test