Test coverage for cando.iep

cando/      covered 65% (1022 of 2940 uncovered)
    iep/      covered 80% (16 of 84 uncovered)
        iep.py      covered 70% (16 of 54 uncovered)
        __init__.py      covered 100% (0 of 1 uncovered)
        browser/      covered 100% (0 of 1 uncovered)
        interfaces.py      covered 100% (0 of 28 uncovered)