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53 lines
1.9 KiB
Python
53 lines
1.9 KiB
Python
"""Tests for modbus configuration validation."""
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import pytest
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from esphome import config_validation as cv
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from esphome.components import modbus
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from esphome.components.modbus import (
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_HUB_TIME_PERIOD,
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CONF_MODBUS_ID,
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_validate_server_address,
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)
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from esphome.const import CONF_ADDRESS
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def test_server_address_accepts_valid_unit_address() -> None:
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# A normal unit address (1-247) is accepted and returned as an int.
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assert _validate_server_address(1) == 1
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assert _validate_server_address(247) == 247
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def test_server_address_accepts_hex_string() -> None:
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# hex_uint8_t parses hex strings, and the validator returns the parsed int.
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assert _validate_server_address("0x10") == 0x10
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def test_server_address_zero_rejected() -> None:
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# Address 0 is the Modbus broadcast address and cannot identify a server device.
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with pytest.raises(cv.Invalid, match="broadcast address"):
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_validate_server_address(0)
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def test_server_schema_rejects_address_zero() -> None:
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# The server-role schema wires in _validate_server_address, so address 0 is rejected there too.
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schema = modbus.modbus_device_schema(0x01, role="server")
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with pytest.raises(cv.Invalid, match="broadcast address"):
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schema({CONF_MODBUS_ID: "hub", CONF_ADDRESS: 0})
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def test_client_schema_still_accepts_address_zero() -> None:
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# A client may address 0: writes are broadcast, and reads are allowed with allow_broadcast_read.
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schema = modbus.modbus_device_schema(0x01)
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assert schema({CONF_MODBUS_ID: "hub", CONF_ADDRESS: 0})[CONF_ADDRESS] == 0
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def test_hub_time_accepts_up_to_65535_ms() -> None:
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assert _HUB_TIME_PERIOD("65535ms").total_milliseconds == 65535
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def test_hub_time_rejects_values_the_hub_would_truncate() -> None:
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# The setters take 16-bit milliseconds: 70 s would silently become 4464 ms.
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with pytest.raises(cv.Invalid):
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_HUB_TIME_PERIOD("70s")
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