using Util.Helpers;
using Util.Tests.Samples;
using Xunit;

namespace Util.Tests.Helpers; 

/// <summary>
/// 测试反射操作
/// </summary>
public class ReflectionTest {
    /// <summary>
    /// 测试查找实现类型列表 - 测试类型中只有一个类实现IA接口
    /// </summary>
    [Fact]
    public void TestFindImplementTypes_1() {
        var types = Reflection.FindImplementTypes<IA>( this.GetType().Assembly );
        Assert.Single( types );
        Assert.Equal( typeof( A ), types[0] );
    }

    /// <summary>
    /// 测试查找实现类型列表 - 抽象类和接口被排除
    /// </summary>
    [Fact]
    public void TestFindImplementTypes_2() {
        var types = Reflection.FindImplementTypes<IB>( this.GetType().Assembly );
        Assert.Equal( 2, types.Count );
        Assert.Equal( typeof( A ), types[0] );
        Assert.Equal( typeof( B ), types[1] );
    }

    /// <summary>
    /// 测试查找实现类型列表 - 泛型实现 
    /// </summary>
    [Fact]
    public void TestFindImplementTypes_3() {
        var types = Reflection.FindImplementTypes<IC>( this.GetType().Assembly );
        Assert.Equal( 2, types.Count );
        Assert.Equal( typeof( B ), types[0] );
        Assert.Equal( typeof( D<> ), types[1] );
    }

    /// <summary>
    /// 测试查找实现类型列表 - 泛型参数为E
    /// </summary>
    [Fact]
    public void TestFindImplementTypes_4() {
        var types = Reflection.FindImplementTypes<IG<E>>( this.GetType().Assembly );
        Assert.Single( types );
        Assert.Equal( typeof( E ), types[0] );
    }

    /// <summary>
    /// 测试查找实现类型列表 - 泛型参数为空
    /// </summary>
    [Fact]
    public void TestFindImplementTypes_5() {
        var types = Reflection.FindImplementTypes( typeof( IG<> ), this.GetType().Assembly );
        Assert.Equal( 2, types.Count );
        Assert.Equal( typeof( E ), types[0] );
        Assert.Equal( typeof( F<> ), types[1] );
    }

    /// <summary>
    /// 测试查找实现类型列表 - 测试并发
    /// </summary>
    [Fact]
    public void TestFindImplementTypes_6() {
        Util.Helpers.Thread.ParallelInvoke( () => {
            var types = Reflection.FindImplementTypes<IA>( this.GetType().Assembly );
            Assert.Single( types );
            Assert.Equal( typeof( A ), types[0] );
        }, () => {
            var types = Reflection.FindImplementTypes<IB>( this.GetType().Assembly );
            Assert.Equal( 2, types.Count );
            Assert.Equal( typeof( A ), types[0] );
            Assert.Equal( typeof( B ), types[1] );
        }, () => {
            var types = Reflection.FindImplementTypes<IC>( this.GetType().Assembly );
            Assert.Equal( 2, types.Count );
            Assert.Equal( typeof( B ), types[0] );
            Assert.Equal( typeof( D<> ), types[1] );
        } );
    }
}