How to use the honcho.environ.Procfile function in honcho

def test_has_no_processes_after_init(self):
        p = environ.Procfile()
        assert len(p.processes) == 0

def test_add_process(self):
        p = environ.Procfile()
        p.add_process('foo', 'echo 123')
        assert 'echo 123' == p.processes['foo']

def test_add_process_ensures_unique_name(self):
        p = environ.Procfile()
        p.add_process('foo', 'echo 123')
        with pytest.raises(AssertionError):
            p.add_process('foo', 'echo 123')

def parse_procfile(contents):
    p = Procfile()
    for line in contents.splitlines():
        m = PROCFILE_LINE.match(line)
        if m:
            p.add_process(m.group(1), m.group(2))
    return p