import pytest

def test_initial_state(bg95_mock):
    """Verify initial state of the mock module."""
    assert bg95_mock.check_state() is True
    assert bg95_mock.read_firmware_version() == "Mock_Modem_v2.0"
    assert bg95_mock.read_imei() == "864215030000000"

def test_radio_control(bg95_mock):
    """Test enabling/disabling radio functionality."""
    # Turn Off
    assert bg95_mock.radio_off() is True
    assert bg95_mock.is_radio_on() is False
    
    # Turn On
    assert bg95_mock.radio_on() is True
    assert bg95_mock.is_radio_on() is True

def test_network_attachment(bg95_mock):
    """Test network attach/detach sequence."""
    bg95_mock.radio_on()
    
    # Detach
    assert bg95_mock.detach_network() is True
    assert bg95_mock.is_attached() is False
    
    # Attach
    assert bg95_mock.attach_network() is True
    assert bg95_mock.is_attached() is True

def test_sim_unlock(bg95_mock):
    """Test SIM PIN unlocking."""
    # Mock starts in READY or some state, unlock should return True
    assert bg95_mock.unlock_sim("1234") is True

def test_signal_quality(bg95_mock):
    """Test reading signal quality."""
    rssi, ber = bg95_mock.get_signal_quality()
    assert rssi == 25
    assert ber == 99