// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "services/webnn/webnn_context_provider_impl.h"

#include "base/run_loop.h"
#include "base/test/bind.h"
#include "base/test/scoped_feature_list.h"
#include "base/test/test_future.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/webnn/buildflags.h"
#include "services/webnn/public/mojom/features.mojom-features.h"
#include "services/webnn/public/mojom/webnn_context.mojom.h"
#include "services/webnn/public/mojom/webnn_context_provider.mojom.h"
#include "services/webnn/public/mojom/webnn_error.mojom.h"
#include "services/webnn/webnn_test_environment.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace webnn {

// `WebNNContextProviderImplTest` only focuses on the non-supported platforms.
// For supported platforms, it should be tested by the backend specific test
// cases.
//
// For platforms using LiteRT, `litert::ContextImplLiteRt` is always available.

#if !BUILDFLAG(IS_WIN) && !BUILDFLAG(IS_MAC) && \
    !BUILDFLAG(WEBNN_USE_TFLITE) && !BUILDFLAG(WEBNN_USE_LITERT)

class WebNNContextProviderImplTest : public testing::Test {
 public:
  WebNNContextProviderImplTest(const WebNNContextProviderImplTest&) = delete;
  WebNNContextProviderImplTest& operator=(const WebNNContextProviderImplTest&) =
      delete;

  test::WebNNTestEnvironment& test_environment() {
    return webnn_test_environment_;
  }

 protected:
  WebNNContextProviderImplTest()
      : scoped_feature_list_(
            webnn::mojom::features::kWebMachineLearningNeuralNetwork) {}
  ~WebNNContextProviderImplTest() override = default;

 private:
  test::WebNNTestEnvironment webnn_test_environment_;
  base::test::ScopedFeatureList scoped_feature_list_;
};

TEST_F(WebNNContextProviderImplTest, NotSupported) {
  mojo::Remote<mojom::WebNNContextProvider> provider_remote;

  test_environment().BindWebNNContextProvider(
      provider_remote.BindNewPipeAndPassReceiver());

  base::test::TestFuture<mojom::CreateContextResultPtr> future;
  provider_remote->CreateWebNNContext(mojom::CreateContextOptions::New(),
                                      future.GetCallback());
  mojom::CreateContextResultPtr result = future.Take();
  ASSERT_TRUE(result->is_error());
  const mojom::ErrorPtr& create_context_error = result->get_error();
  EXPECT_EQ(create_context_error->code, mojom::Error::Code::kNotSupportedError);
  EXPECT_EQ(create_context_error->message,
            "WebNN is not supported on this platform.");
}

#endif

}  // namespace webnn