trainGetAttribute(cycle, TapestryUtils.FORM_ATTRIBUTE, form);
expect(form.wasPrerendered(writer, comp)).andReturn(false);
expect(form.getElementId(comp)).andReturn("suggest");
expect(cycle.getParameter("suggest")).andReturn("b");
expect(converter.coerceValue(source, Iterator.class)).andReturn(source.iterator());
replay();
comp.renderComponent(writer, cycle);