sebastienros.jint/Jint.Tests/Runtime/DelegateWrapperTests.cs

using Jint.Runtime.Interop;

namespace Jint.Tests.Runtime;

public class DelegateWrapperTests
{
    [Fact]
    public void ShouldSpreadParameters()
    {
        var engine = new Engine();
        engine.SetValue("registerCallback", new DelegateWrapper(engine, new RegisterCallbackDelegate(RegisterCallback)));

        engine.Execute(@"
                var argsConcat = '';
                registerCallback((valTest, valOther, valNumber) => {
                    argsConcat+=typeof valTest;
                    argsConcat+=' ' + typeof valOther;
                    argsConcat+=' ' + typeof valNumber;
                }, 'test', 'other', 1337);
            ");

        Assert.True(engine.Evaluate("argsConcat == 'string string number'").AsBoolean());
    }

    private static void RegisterCallback(CallbackAction callback, params object[] arguments)
    {
        callback.Invoke(arguments);
    }

    private delegate void RegisterCallbackDelegate(CallbackAction callback, params object[] arguments);

    private delegate void CallbackAction(params object[] arguments);
}