Initial tests on eina promises support for efl C# bindings

promises_tests.cs

using System;

namespace TestSuite
{

class TestPromises
{
    public static void test_simple_cancel()
    {
        bool cleanCalled = false;
        eina.Promise promise = new eina.Promise(() => { cleanCalled = true; });
        eina.Future future = new eina.Future(promise);
        future.Cancel();
        Test.Assert(cleanCalled, "Promise clean callback should have been called.");
    }

    public static void test_simple_resolve()
    {
        bool callbackCalled = false;
        eina.Value received_value = null;

        efl.Loop loop = efl.AppConcrete.GetLoopMain();
        eina.Promise promise = new eina.Promise(() => {});
        eina.Future future = new eina.Future(promise);

        future = future.Then((eina.Value value) => {
            callbackCalled = true;
            received_value = value;
            return value;
        } );

        eina.Value reference_value = new eina.Value(eina.ValueType.Int32);
        reference_value.Set(1984);
        promise.Resolve(reference_value);

        loop.Iterate();

        Test.Assert(callbackCalled, "Future callback should have been called.");
        Test.AssertEquals(received_value, reference_value);
    }
}

}