public void VisitUnbox()
{
var expression = ExpressionTreeObjectMother.GetSomeUnboxExpression();
_childExpressionEmitterMock.Setup(mock => mock.EmitChildExpression(expression.Operand)).Verifiable();
_ilGeneratorMock.Setup(mock => mock.Emit(OpCodes.Unbox_Any, expression.Type)).Verifiable();
var result = _emitter.VisitUnbox(expression);
_childExpressionEmitterMock.Verify();
_ilGeneratorMock.Verify();
Assert.That(result, Is.SameAs(expression));
}