def test_is_nostation2(chunk1):
"""parsing a all-station address should return False on is_nostation()"""
iframe = IFrame()
iframe.parse_address(chunk1)
assert iframe.is_nostation() is False
def test_is_nostation3(chunk2):
"""parsing a no-station address should return True in is_nostation()"""
iframe = IFrame()
iframe.parse_address(chunk2)
assert iframe.is_nostation() is True
def test_is_nostation1():
"""'no station' should be the default address for a base frame."""
iframe = IFrame()
assert iframe.is_nostation() is True
