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Limit precision when stringifying float states (#48822)

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* Limit precision when stringifying float states

* Add test

* Fix typing

* Move StateType

* Update

* Move conversion to entity helper

* Address review comments

* Tweak precision

* Tweak

* Make _stringify_state an instance method
This commit is contained in:
Erik Montnemery 2021-04-27 21:48:24 +02:00 • committed by GitHub
parent 5e00fdccfd
commit d2fd504442
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3 changed files with 55 additions and 5 deletions
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14
tests/helpers/test_entity.py
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@ -774,3 +774,17 @@ async def test_get_supported_features_raises_on_unknown(hass):
"""Test get_supported_features raises on unknown entity_id."""
with pytest.raises(HomeAssistantError):
entity.get_supported_features(hass, "hello.world")
async def test_float_conversion(hass):
"""Test conversion of float state to string rounds."""
assert 2.4 + 1.2 != 3.6
with patch.object(entity.Entity, "state", PropertyMock(return_value=2.4 + 1.2)):
ent = entity.Entity()
ent.hass = hass
ent.entity_id = "hello.world"
ent.async_write_ha_state()
state = hass.states.get("hello.world")
assert state is not None
assert state.state == "3.6"