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esphome/tests/unit_tests/components/test_ch423.py
David Woodhouse 823b5ac1ab [ch423] Add CH423 I/O expander component (#13079)
Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
2026-01-29 18:16:15 -05:00

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1.2 KiB
Python

"""Tests for ch423 component validation."""
from unittest.mock import patch
from esphome import config, yaml_util
from esphome.core import CORE
def test_ch423_mixed_gpio_modes_fails(tmp_path, capsys):
"""Test that mixing input/output on GPIO pins 0-7 fails validation."""
test_file = tmp_path / "test.yaml"
test_file.write_text("""
esphome:
name: test
esp8266:
board: esp01_1m
i2c:
sda: GPIO4
scl: GPIO5
ch423:
- id: ch423_hub
binary_sensor:
- platform: gpio
name: "CH423 Input 0"
pin:
ch423: ch423_hub
number: 0
mode: input
switch:
- platform: gpio
name: "CH423 Output 1"
pin:
ch423: ch423_hub
number: 1
mode: output
""")
parsed_yaml = yaml_util.load_yaml(test_file)
with (
patch.object(yaml_util, "load_yaml", return_value=parsed_yaml),
patch.object(CORE, "config_path", test_file),
):
result = config.read_config({})
assert result is None, "Expected validation to fail with mixed GPIO modes"
# Check that the error message mentions the GPIO pin restriction
captured = capsys.readouterr()
assert (
"GPIO pins (0-7) must all be configured as input or all as output"
in captured.out
)