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# SPDX-FileCopyrightText: 2024 pydot contributors
#
# SPDX-License-Identifier: MIT
"""Unit testing of `pydot.classes`."""
import pytest
import pydot
from pydot.classes import FrozenDict
def test_FrozenDict_create(objdict):
fd = FrozenDict(objdict)
assert isinstance(fd, FrozenDict)
assert isinstance(fd["attributes"], FrozenDict)
assert isinstance(fd["nodes"], FrozenDict)
assert isinstance(fd["nodes"]["3"], tuple)
assert isinstance(fd["nodes"]["16"], tuple)
fd2 = FrozenDict((("a", 1), ("b", 2)), obj_dict={"frozen": fd})
assert isinstance(fd2["obj_dict"], FrozenDict)
assert len(fd2) == 3
assert fd == fd2["obj_dict"]["frozen"]
def test_FrozenDict_modify(objdict):
fd = FrozenDict(objdict)
with pytest.raises(AttributeError):
fd.clear()
with pytest.raises(AttributeError):
fd["nodes"] = None
with pytest.raises(AttributeError):
fd["nodes"].update({"12": [{"name": "12"}]})
with pytest.raises(AttributeError):
fd.popitem()
with pytest.raises(AttributeError):
fd.pop("nodes")
with pytest.raises(AttributeError):
fd.setdefault("edges", None)
with pytest.raises(AttributeError):
del fd["nodes"]
def test_FrozenDict_compare():
dict_in = {
"red": "first",
"green": "second",
"blue": "third",
}
fd1 = FrozenDict(dict_in)
fd2 = FrozenDict(dict(sorted(dict_in.items())))
assert hash(fd1) == hash(tuple(dict_in.items()))
assert hash(fd2) != hash(tuple(dict_in.items()))
assert fd1 != fd2
assert fd1 == dict_in
assert fd2 == dict_in # Unfortunate fallback to dict.__eq__
def test_frozendict_deprecation(objdict):
with pytest.warns(DeprecationWarning):
fd = pydot.frozendict(objdict)
assert isinstance(fd, FrozenDict)
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