// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Moq;
 
namespace Microsoft.AspNetCore.Mvc.ModelBinding.Binders;
 
public class DictionaryModelBinderProviderTest
{
    [Theory]
    [InlineData(typeof(Person))]
    [InlineData(typeof(string))]
    [InlineData(typeof(IEnumerable<KeyValuePair<string, int>>))]
    [InlineData(typeof(ICollection<string>))]
    public void Create_ForNonDictionaryType_ReturnsNull(Type modelType)
    {
        // Arrange
        var provider = new DictionaryModelBinderProvider();
 
        var context = new TestModelBinderProviderContext(modelType);
 
        // Act
        var result = provider.GetBinder(context);
 
        // Assert
        Assert.Null(result);
    }
 
    [Theory]
    [InlineData(typeof(IDictionary<string, int>))]
    [InlineData(typeof(Dictionary<string, int>))]
    public void Create_ForDictionaryType_ReturnsBinder(Type modelType)
    {
        // Arrange
        var provider = new DictionaryModelBinderProvider();
 
        var context = new TestModelBinderProviderContext(modelType);
        context.OnCreatingBinder(m =>
        {
            if (m.ModelType == typeof(KeyValuePair<string, int>) ||
                m.ModelType == typeof(int) ||
                m.ModelType == typeof(string))
            {
                return Mock.Of<IModelBinder>();
            }
            else
            {
                Assert.Fail("Not the right model type");
                return null;
            }
        });
 
        // Act
        var result = provider.GetBinder(context);
 
        // Assert
        var binder = Assert.IsType<DictionaryModelBinder<string, int>>(result);
        Assert.False(binder.AllowValidatingTopLevelNodes); // work done in DictionaryModelBinder.
    }
 
    private class Person
    {
        public string Name { get; set; }
 
        public int Age { get; set; }
    }
}