Example pytest unit test

test_sunos_get_uptime_facts.py

import time
from ansible.module_utils.facts.hardware import sunos


def test_sunos_get_uptime_facts(mocker):
    kstat_output = '\nunix:0:system_misc:boot_time\t1548249689\n'

    module_mock = mocker.patch('ansible.module_utils.basic.AnsibleModule')
    module = module_mock()
    module.run_command.return_value = (0, kstat_output, '')

    inst = sunos.SunOSHardware(module)

    expected = int(time.time()) - 1548249689
    result = inst.get_uptime_facts()
    assert expected == result['uptime_seconds']

I updated the example with working code. I'm not sure exactly about the real output since I don't have a system to test on. If you feel it's necessary, we could also add more output examples and iterate through them.