// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace Microsoft.AspNetCore.Mvc.ModelBinding.Binders;
 
public class BinderTypeModelBinderProviderTest
{
    [Fact]
    public void Create_WhenBinderTypeIsNull_ReturnsNull()
    {
        // Arrange
        var provider = new BinderTypeModelBinderProvider();
 
        var context = new TestModelBinderProviderContext(typeof(Person));
 
        // Act
        var result = provider.GetBinder(context);
 
        // Assert
        Assert.Null(result);
    }
 
    [Fact]
    public void Create_WhenBinderTypeIsSet_ReturnsBinder()
    {
        // Arrange
        var provider = new BinderTypeModelBinderProvider();
 
        var context = new TestModelBinderProviderContext(typeof(Person));
        context.BindingInfo.BinderType = typeof(NullModelBinder);
 
        // Act
        var result = provider.GetBinder(context);
 
        // Assert
        Assert.IsType<BinderTypeModelBinder>(result);
    }
 
    private class Person
    {
        public string Name { get; set; }
 
        public int Age { get; set; }
    }
 
    private class NullModelBinder : IModelBinder
    {
        public Task BindModelAsync(ModelBindingContext bindingContext)
        {
            return Task.FromResult(0);
        }
    }
}