Target of extension method invocation

[erik-kallen]

        [Test]
        public void FirstParameterToExtensionMethod()
        {
            string program = @"
namespace N {
    public class X {}
    public static class Ex {
        public static void F(this X x, int y, int z) {}
    }
    class C {
        public void M() {
            X a = null;
            int b = 0, c = 0;
            // BEGIN
            $a.F(b, c)$;
            // END
        }
    }
}";
            var rr = Resolve<CSharpInvocationResolveResult>(program);
            Assert.IsFalse(rr.IsError);
            Assert.That(rr.IsExtensionMethodInvocation, Is.True);
            Assert.That(rr.Arguments[0], Is.InstanceOf<LocalResolveResult>());
            Assert.That(((LocalResolveResult)rr.Arguments[0]).Variable.Name, Is.EqualTo("a"));
            Assert.That(rr.Arguments[1], Is.InstanceOf<LocalResolveResult>());
            Assert.That(((LocalResolveResult)rr.Arguments[1]).Variable.Name, Is.EqualTo("b"));
            Assert.That(rr.Arguments[2], Is.InstanceOf<LocalResolveResult>());
            Assert.That(((LocalResolveResult)rr.Arguments[2]).Variable.Name, Is.EqualTo("c"));
        }