home-assistant-core/tests/components/knx

Testing the KNX integration

A KNXTestKit instance can be requested from a fixture. It provides convenience methods to test outgoing KNX telegrams and inject incoming telegrams. To test something add a test function requesting the hass and knx fixture and set up the KNX integration by passing a KNX config dict to knx.setup_integration.

async def test_something(hass, knx):
    await knx.setup_integration({
            "switch": {
                "name": "test_switch",
                "address": "1/2/3",
            }
        }
    )

Asserting outgoing telegrams

All outgoing telegrams are pushed to an assertion queue. Assert them in order they were sent.

• knx.assert_no_telegram Asserts that no telegram was sent (assertion queue is empty).
• knx.assert_telegram_count(count: int) Asserts that count telegrams were sent.
• knx.assert_read(group_address: str) Asserts that a GroupValueRead telegram was sent to group_address. The telegram will be removed from the assertion queue.
• knx.assert_response(group_address: str, payload: int | tuple[int, ...]) Asserts that a GroupValueResponse telegram with payload was sent to group_address. The telegram will be removed from the assertion queue.
• knx.assert_write(group_address: str, payload: int | tuple[int, ...]) Asserts that a GroupValueWrite telegram with payload was sent to group_address. The telegram will be removed from the assertion queue.

Change some states or call some services and assert outgoing telegrams.

    # turn on switch
    await hass.services.async_call(
        "switch", "turn_on", {"entity_id": "switch.test_switch"}, blocking=True
    )
    # assert ON telegram
    await knx.assert_write("1/2/3", True)

Injecting incoming telegrams

• knx.receive_read(group_address: str) Inject and process a GroupValueRead telegram addressed to group_address.
• knx.receive_response(group_address: str, payload: int | tuple[int, ...]) Inject and process a GroupValueResponse telegram addressed to group_address containing payload.
• knx.receive_write(group_address: str, payload: int | tuple[int, ...]) Inject and process a GroupValueWrite telegram addressed to group_address containing payload.

Receive some telegrams and assert state.

    # receive OFF telegram
    await knx.receive_write("1/2/3", False)
    # assert OFF state
    state = hass.states.get("switch.test_switch")
    assert state.state is STATE_OFF

Notes

• For payload in assert_* and receive_* use int for DPT 1, 2 and 3 payload values (DPTBinary) and tuple for other DPTs (DPTArray).
• await self.hass.async_block_till_done() is called before KNXTestKit.assert_* and after KNXTestKit.receive_* so you don't have to explicitly call it.
• Make sure to assert every outgoing telegram that was created in a test. assert_no_telegram is automatically called on teardown.