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# Copyright 2024 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.
import json
from pathlib import Path
from typing import Any
import pytest
from lerobot.utils.io_utils import deserialize_json_into_object
@pytest.fixture
def tmp_json_file(tmp_path: Path):
"""Writes `data` to a temporary JSON file and returns the file's path."""
def _write(data: Any) -> Path:
file_path = tmp_path / "data.json"
with file_path.open("w", encoding="utf-8") as f:
json.dump(data, f)
return file_path
return _write
def test_simple_dict(tmp_json_file):
data = {"name": "Alice", "age": 30}
json_path = tmp_json_file(data)
obj = {"name": "", "age": 0}
assert deserialize_json_into_object(json_path, obj) == data
def test_nested_structure(tmp_json_file):
data = {"items": [1, 2, 3], "info": {"active": True}}
json_path = tmp_json_file(data)
obj = {"items": [0, 0, 0], "info": {"active": False}}
assert deserialize_json_into_object(json_path, obj) == data
def test_tuple_conversion(tmp_json_file):
data = {"coords": [10.5, 20.5]}
json_path = tmp_json_file(data)
obj = {"coords": (0.0, 0.0)}
result = deserialize_json_into_object(json_path, obj)
assert result["coords"] == (10.5, 20.5)
def test_type_mismatch_raises(tmp_json_file):
data = {"numbers": {"bad": "structure"}}
json_path = tmp_json_file(data)
obj = {"numbers": [0, 0]}
with pytest.raises(TypeError):
deserialize_json_into_object(json_path, obj)
def test_missing_key_raises(tmp_json_file):
data = {"one": 1}
json_path = tmp_json_file(data)
obj = {"one": 0, "two": 0}
with pytest.raises(ValueError):
deserialize_json_into_object(json_path, obj)
def test_extra_key_raises(tmp_json_file):
data = {"one": 1, "two": 2}
json_path = tmp_json_file(data)
obj = {"one": 0}
with pytest.raises(ValueError):
deserialize_json_into_object(json_path, obj)
def test_list_length_mismatch_raises(tmp_json_file):
data = {"nums": [1, 2, 3]}
json_path = tmp_json_file(data)
obj = {"nums": [0, 0]}
with pytest.raises(ValueError):
deserialize_json_into_object(json_path, obj)
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