src/Http/Routing/test/UnitTests/RouteBuilderTest.cs


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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Moq;
using Xunit;

namespace Microsoft.AspNetCore.Routing;

public class RouteBuilderTest
{
    [Fact]
    public void Ctor_SetsPropertyValues()
    {
        // Arrange
        var services = new ServiceCollection();
        services.AddSingleton(typeof(RoutingMarkerService));
        var applicationServices = services.BuildServiceProvider();
        var applicationBuilderMock = new Mock<IApplicationBuilder>();
        applicationBuilderMock.Setup(a => a.ApplicationServices).Returns(applicationServices);
        var applicationBuilder = applicationBuilderMock.Object;
        var defaultHandler = Mock.Of<IRouter>();

        // Act
        var builder = new RouteBuilder(applicationBuilder, defaultHandler);

        // Assert
        Assert.Same(applicationBuilder, builder.ApplicationBuilder);
        Assert.Same(defaultHandler, builder.DefaultHandler);
        Assert.Same(applicationServices, builder.ServiceProvider);
    }

    [Fact]
    public void Ctor_ThrowsInvalidOperationException_IfRoutingMarkerServiceIsNotRegistered()
    {
        // Arrange
        var applicationBuilderMock = new Mock<IApplicationBuilder>();
        applicationBuilderMock
            .Setup(s => s.ApplicationServices)
            .Returns(Mock.Of<IServiceProvider>());

        // Act & Assert
        var exception = Assert.Throws<InvalidOperationException>(() => new RouteBuilder(applicationBuilderMock.Object));

        Assert.Equal(
            "Unable to find the required services. Please add all the required services by calling " +
            "'IServiceCollection.AddRouting' inside the call to 'ConfigureServices(...)'" +
            " in the application startup code.",
            exception.Message);
    }
}