examples/iface: expand test
examples/iface: expand test

Change-Id: Ibe437b2af33ec9adcf136e51acf50bbc5f4e18b7

kellrott/gopy,go-python/gopy,go-python/gopy,kellrott/gopy,go-python/gopy-gen,lifei/gopy,lifei/gopy,go-python/gopy-gen