fluentassertions.autofac/FluentAssertions.Autofac.Tests/RegistrationAssertions_Should.cs at main · fluentassertions/fluentassertions.autofac · GitHub

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using System;
using System.Diagnostics.CodeAnalysis;
using Autofac;
using Autofac.Core;
using Xunit;

namespace FluentAssertions.Autofac;

// ReSharper disable InconsistentNaming
public class RegistrationAssertions_Should
{
    [Fact]
    public void Register_Named()
    {
        var containerShouldHave = GetSut(builder =>
            builder.RegisterType<NamedDummy>().Named<IDisposable>("Dummy")
        );

        containerShouldHave.Registered<NamedDummy>()
            .Named<IDisposable>("Dummy")
            .Keyed<IDisposable>("Dummy");
    }

    [Fact]
    public void Register_Keyed()
    {
        var containerShouldHave = GetSut(builder =>
            builder.RegisterType<KeyedDummy>().Keyed<IComparable>(42)
        );

        containerShouldHave.Registered<KeyedDummy>()
            .Keyed<IComparable>(42);
    }

    [Fact]
    public void Register_Lifetime()
    {
        var containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().SingleInstance());
        containerShouldHave.Registered<Dummy>().SingleInstance();

        containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().InstancePerDependency());
        containerShouldHave.Registered<Dummy>().InstancePerDependency();

        containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().InstancePerLifetimeScope());
        containerShouldHave.Registered<Dummy>().InstancePerLifetimeScope();

        containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().InstancePerMatchingLifetimeScope());
        containerShouldHave.Registered<Dummy>().InstancePerMatchingLifetimeScope();

        containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().InstancePerRequest());
        containerShouldHave.Registered<Dummy>().InstancePerRequest();

        containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().InstancePerOwned<IDisposable>());
        containerShouldHave.Registered<Dummy>().InstancePerOwned<IDisposable>();
    }

    [Fact]
    public void Register_Ownership()
    {
        var containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().ExternallyOwned());
        containerShouldHave.Registered<Dummy>()
            .ExternallyOwned()
            .Owned(InstanceOwnership.ExternallyOwned);

        containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().OwnedByLifetimeScope());
        containerShouldHave.Registered<Dummy>()
            .OwnedByLifetimeScope()
            .Owned(InstanceOwnership.OwnedByLifetimeScope);
    }

    [Fact]
    public void Register_AutoActivate()
    {
        var containerShouldHave = GetSut(builder => builder.RegisterType<Dummy>().As<IDisposable>().AutoActivate());
        containerShouldHave.Registered<Dummy>().As<IDisposable>().AutoActivate();
    }

    [Fact]
    public void Register_parameters()
    {
        var builder = new ContainerBuilder();

        const string paramName = "name";
        const string paramValue = "Name";

        builder.RegisterType<Dummy>()
            .As<IDisposable>()
            .WithParameter(paramName, paramValue)
            .WithParameter(new NamedParameter(paramName, paramValue))
            .WithParameter(new PositionalParameter(0, paramValue));

        var container = builder.Build();
        container.Should().Have()
            .Registered<Dummy>()
            .As<IDisposable>()
            .WithParameter(paramName, paramValue)
            .WithParameter(new NamedParameter(paramName, paramValue))
            .WithParameter(new PositionalParameter(0, paramValue))
            ;
    }

    [Fact]
    public void Register_parametersMatchingPredicate()
    {
        var builder = new ContainerBuilder();

        builder.RegisterType<Dummy>()
            .As<IDisposable>()
            .WithParameter(new TypedParameter(typeof(string), "stringValue"))
            .WithParameter(new TypedParameter(typeof(int), "intValue"));

        static bool IsString(Parameter p) => p is TypedParameter tp
#pragma warning disable CS0252 // Possible unintended reference comparison; left hand side needs cast
                                             && tp.Type == typeof(string) && tp.Value == "stringValue";
#pragma warning restore CS0252 // Possible unintended reference comparison; left hand side needs cast

        static bool IsTyped(Parameter p)
        {
            return p is TypedParameter;
        }

        var container = builder.Build();
        container.Should().Have()
            .Registered<Dummy>()
            .As<IDisposable>()
            .WithParameter(IsString)
            .WithParameter(IsTyped, 2);
    }

    private static ContainerRegistrationAssertions GetSut(Action<ContainerBuilder> arrange = null)
    {
        var builder = new ContainerBuilder();
        arrange?.Invoke(builder);
        return builder.Build().Should().Have();
    }

    [ExcludeFromCodeCoverage]
    // ReSharper disable ClassNeverInstantiated.Local
    private class Dummy : IDisposable
    {
        public void Dispose() { }
    }

    [ExcludeFromCodeCoverage]
    private class NamedDummy : IDisposable
    {
        public void Dispose() { }
    }

    [ExcludeFromCodeCoverage]
    private class KeyedDummy : IComparable
    {
        public int CompareTo(object obj) { return 42; }
    }

    [ExcludeFromCodeCoverage]
    // ReSharper disable once UnusedMember.Local
    // ReSharper disable once UnusedType.Local
    private class ParameterizedDummy : Dummy
    {
        public ParameterizedDummy(string name) { Name = name; }

        // ReSharper disable once MemberCanBePrivate.Local
        // ReSharper disable once UnusedAutoPropertyAccessor.Local
        public string Name { get; }
    }
}