// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Infrastructure;
using Microsoft.AspNetCore.Mvc.NewtonsoftJson;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Mvc.ViewFeatures.Infrastructure;
using Microsoft.Extensions.Options;
using Newtonsoft.Json.Serialization;
using Xunit;

namespace Microsoft.Extensions.DependencyInjection
{
    public class NewtonsoftJsonMvcCoreBuilderExtensionsTest
    {
        [Fact]
        public void AddNewtonsoftJson_ConfiguresOptions()
        {
            // Arrange
            var services = new ServiceCollection();

            // Act
            services.AddMvcCore()
                .AddNewtonsoftJson((options) =>
                {
                    options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                });

            // Assert
            Assert.Single(services, d => d.ServiceType == typeof(IConfigureOptions<MvcNewtonsoftJsonOptions>));
        }

        [Fact]
        public void AddServicesCore_ReplacesDefaultJsonHelper()
        {
            // Arrange
            var services = new ServiceCollection()
                .AddSingleton<IJsonHelper, SystemTextJsonHelper>();

            // Act
            NewtonsoftJsonMvcCoreBuilderExtensions.AddServicesCore(services);

            // Assert
            var jsonHelper = Assert.Single(services, d => d.ServiceType == typeof(IJsonHelper));
            Assert.Same(typeof(NewtonsoftJsonHelper), jsonHelper.ImplementationType);
        }

        [Fact]
        public void AddServicesCore_ReplacesDefaultTempDataSerializer()
        {
            // Arrange
            var services = new ServiceCollection()
                .AddSingleton<TempDataSerializer, DefaultTempDataSerializer>();

            // Act
            NewtonsoftJsonMvcCoreBuilderExtensions.AddServicesCore(services);

            // Assert
            var tempDataSerializer = Assert.Single(services, d => d.ServiceType == typeof(TempDataSerializer));
            Assert.Same(typeof(BsonTempDataSerializer), tempDataSerializer.ImplementationType);
        }

        [Fact]
        public void AddServicesCore_ReplacesDefaultJsonResultExecutor()
        {
            // Arrange
            var services = new ServiceCollection()
                .AddSingleton<IActionResultExecutor<JsonResult>, SystemTextJsonResultExecutor>();

            // Act
            NewtonsoftJsonMvcCoreBuilderExtensions.AddServicesCore(services);

            // Assert
            var jsonResultExecutor = Assert.Single(services, d => d.ServiceType == typeof(IActionResultExecutor<JsonResult>));
            Assert.Same(typeof(NewtonsoftJsonResultExecutor), jsonResultExecutor.ImplementationType);
        }
    }
}
