aspnetcore/test/Microsoft.AspNetCore.Mvc.IntegrationTests/HasValidatorsValidationMetadataProviderIntegrationTest.cs

// 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 System.Linq;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.ModelBinding.Validation;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.ObjectPool;
using Microsoft.Extensions.Options;
using Xunit;

namespace Microsoft.AspNetCore.Mvc.IntegrationTests
{
    public class HasValidatorsValidationMetadataProviderIntegrationTest
    {
        [Fact]
        public void HasValidatorsValidationMetadataProvider_IsRegisteredAfterOtherMetadataProviders()
        {
            // HasValidatorsValidationMetadataProvider uses values populated by other details providers to query validator providers
            // This test ensures all other detail providers have had an opportunity to modify validation metadata first.
            // Arrange
            var serviceCollection = new ServiceCollection();
            serviceCollection.AddLogging();
            serviceCollection.AddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>();
            serviceCollection.AddMvc();
            var services = serviceCollection.BuildServiceProvider();

            // Act
            var options = services.GetRequiredService<IOptions<MvcOptions>>();

            Assert.IsType<HasValidatorsValidationMetadataProvider>(options.Value.ModelMetadataDetailsProviders.Last());
        }

        [Fact]
        public void HasValidatorsValidationMetadataProvider_IsRegisteredAfterUserSpecifiedMetadataProvider()
        {
            // Arrange
            var serviceCollection = new ServiceCollection();
            serviceCollection.AddLogging();
            serviceCollection.AddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>();
            serviceCollection.AddMvc(mvcOptions =>
            {
                mvcOptions.ModelMetadataDetailsProviders.Add(new SuppressChildValidationMetadataProvider(typeof(IQueryable)));
            });
            var services = serviceCollection.BuildServiceProvider();

            // Act
            var options = services.GetRequiredService<IOptions<MvcOptions>>();

            Assert.IsType<HasValidatorsValidationMetadataProvider>(options.Value.ModelMetadataDetailsProviders.Last());
        }
    }
}