import pytest

def test_gas_setup(gpiod, gpiodevice, smbus):

from enviroplus import gas

gas._is_setup = False

gas.setup()

gas.setup()

def test_gas_unavailable(gpiod, gpiodevice, mocksmbus):

from enviroplus import gas

mocksmbus.SMBus(1).read_i2c_block_data.side_effect = IOError("Oh no!")

gas._is_setup = False

assert gas.available() is False

with pytest.raises(RuntimeError):

gas.read_all()

def test_gas_available(gpiod, gpiodevice, smbus_notimeout):

from enviroplus import gas

gas._is_setup = False

assert gas.available() is True

def test_gas_read_all(gpiod, gpiodevice, smbus):

from enviroplus import gas

gas._is_setup = False

result = gas.read_all()

assert isinstance(result.oxidising, float)

assert int(result.oxidising) == 16641

assert isinstance(result.reducing, float)

assert int(result.reducing) == 16727

assert isinstance(result.nh3, float)

assert int(result.nh3) == 16813

assert "Oxidising" in str(result)

def test_gas_read_each(gpiod, gpiodevice, smbus):

from enviroplus import gas

gas._is_setup = False

assert int(gas.read_oxidising()) == 16641

assert int(gas.read_reducing()) == 16727

assert int(gas.read_nh3()) == 16813

def test_gas_read_adc(gpiod, gpiodevice, smbus):

from enviroplus import gas

gas._is_setup = False

gas.enable_adc(True)

gas.set_adc_gain(2.048)

assert gas.read_adc() == 0.255

def test_gas_read_adc_default_gain(gpiod, gpiodevice, smbus):

from enviroplus import gas

gas._is_setup = False

gas.enable_adc(True)

gas.set_adc_gain(gas.MICS6814_GAIN)

assert gas.read_adc() == 0.765

def test_gas_read_adc_str(gpiod, gpiodevice, smbus):

from enviroplus import gas

gas._is_setup = False

gas.enable_adc(True)

gas.set_adc_gain(2.048)

assert "ADC" in str(gas.read_all())

def test_gas_cleanup(gpiod, gpiodevice, smbus):

from enviroplus import gas

gas.cleanup()

gas.setup()

gas.cleanup()