Creating a simulation of a JavaScript callback within a C# host program

Currently, I am in the process of developing a c# application with an embedded web browser control. In this project, I'm facing a challenge where I need to call a C# method from JavaScript and pass a JavaScript callback using the dynamic technique explained in this stackoverflow answer:

public void CallbackTest(object callback)
{
    dynamic callbackFunc = callback;
    callbackFunc("Hello!");
}

I am now stuck on how to proceed with unit testing for this method. Specifically, I am unsure of how to mock or fake the callback parameter. For context, I usually use Moq as my preferred mocking library.

Answer №1

If you pass an Action<String> as a callback, it should work seamlessly. It's uncertain if Moq has direct support for dynamic features like this, but utilizing an Action is simple and effective.

var callbackFunction = new Action<String>(str => {return;});
TestCallback(callbackFunction)

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