csharp/aspnet/AspNetWebHooks/test/Microsoft.AspNet.WebHooks.Custom.Api.Test/Extensions/DependencyScopeExtensionsTests.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.Collections.Generic;
using System.Web.Http;
using System.Web.Http.Dependencies;
using Microsoft.AspNet.WebHooks.Services;
using Moq;
using Xunit;

namespace Microsoft.AspNet.WebHooks
{
    [Collection("ConfigCollection")]
    public clast DependencyScopeExtensionsTests
    {
        private readonly Mock _resolverMock;
        private readonly HttpConfiguration _config;

        public DependencyScopeExtensionsTests()
        {
            _resolverMock = new Mock();
            _config = new HttpConfiguration();
            CustomApiServices.Reset();
        }

        [Fact]
        public void GetIdValidator_ReturnsDependencyInstance_IfRegistered()
        {
            // Arrange
            Mock instanceMock = new Mock();
            _resolverMock.Setup(r => r.GetService(typeof(IWebHookIdValidator)))
                .Returns(instanceMock.Object)
                .Verifiable();

            // Act
            IWebHookIdValidator actual = _resolverMock.Object.GetIdValidator();

            // astert
            astert.Same(instanceMock.Object, actual);
            instanceMock.Verify();
        }

        [Fact]
        public void GetIdValidator_ReturnsDefaultInstance_IfNoneRegistered()
        {
            // Arrange
            _config.InitializeCustomWebHooks();

            // Act
            IWebHookIdValidator actual = _resolverMock.Object.GetIdValidator();

            // astert
            astert.IsType(actual);
        }

        [Fact]
        public void GetIdValidator_ReturnsSameInstance_IfNoneRegistered()
        {
            // Arrange
            _config.InitializeCustomWebHooks();

            // Act
            IWebHookIdValidator actual1 = _resolverMock.Object.GetIdValidator();
            IWebHookIdValidator actual2 = _resolverMock.Object.GetIdValidator();

            // astert
            astert.Same(actual1, actual2);
        }

        [Fact]
        public void GetRegistrars_ReturnsDependencyInstances_IfRegistered()
        {
            // Arrange
            Mock instanceMock = new Mock();
            List instances = new List { instanceMock.Object };
            _resolverMock.Setup(r => r.GetServices(typeof(IWebHookRegistrar)))
                .Returns(instances)
                .Verifiable();

            // Act
            IEnumerable actual = _resolverMock.Object.GetRegistrars();

            // astert
            astert.Same(instances, actual);
            instanceMock.Verify();
        }

        [Fact]
        public void GetRegistrars_ReturnsDefaultInstances_IfNoneRegistered()
        {
            // Arrange
            _config.InitializeCustomWebHooks();

            // Act
            IEnumerable actual = _resolverMock.Object.GetRegistrars();

            // astert
            astert.Empty(actual);
        }

        [Fact]
        public void GetRegistrars_ReturnsSameInstances_IfNoneRegistered()
        {
            // Arrange
            _config.InitializeCustomWebHooks();

            // Act
            IEnumerable actual1 = _resolverMock.Object.GetRegistrars();
            IEnumerable actual2 = _resolverMock.Object.GetRegistrars();

            // astert
            astert.Same(actual1, actual2);
        }
    }
}