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lerobot/tests/runtime/test_language_runtime.py
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# Copyright 2026 The HuggingFace Inc. team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from lerobot.runtime import (
LanguageConditionedRuntime,
)
class FakeAdapter:
def __init__(self):
self.updated = False
self.interjections = []
def select_action(self, observation, state):
assert observation == {"observation.state": 1}
assert state.task == "clean"
return ["a0", "a1"]
def update_language_state(self, observation, state):
self.updated = True
state.set_context("subtask", "pick cup", label="subtask")
def handle_interjection(self, user_text, observation, state):
self.interjections.append(user_text)
state.set_context("plan", "new plan", label="plan")
def test_runtime_tick_updates_language_enqueues_and_dispatches_action():
adapter = FakeAdapter()
executed = []
runtime = LanguageConditionedRuntime(
policy_adapter=adapter,
observation_provider=lambda: {"observation.state": 1},
action_executor=executed.append,
)
runtime.set_task("clean")
logs = runtime.step_once()
assert adapter.updated
assert runtime.state.language_context["subtask"] == "pick cup"
assert executed == ["a0"]
assert list(runtime.state.action_queue) == ["a1"]
assert " subtask: pick cup" in logs
def test_runtime_handles_user_interjection():
adapter = FakeAdapter()
runtime = LanguageConditionedRuntime(
policy_adapter=adapter,
observation_provider=lambda: {"observation.state": 1},
)
runtime.set_task("clean")
runtime.state.extra["recent_interjection"] = "please say ok"
runtime.state.emit("user_interjection")
runtime.step_once()
assert "please say ok" in adapter.interjections
assert runtime.state.language_context["plan"] == "new plan"