def test_pathlib_paths(tmpdir):
path = pathlib.Path(tmpdir) / 'op.json'
cirq.to_json(cirq.X, path)
assert cirq.read_json(path) == cirq.X
def test_metadata_json_load_logic():
qubits = cirq.LineQubit.range(4)
graph = nx.star_graph(3)
metadata = cirq.DeviceMetadata(qubits, graph)
str_rep = cirq.to_json(metadata)
assert metadata == cirq.read_json(json_text=str_rep)
def assert_repr_and_json_test_data_agree(
mod_spec: ModuleJsonTestSpec,
repr_path: pathlib.Path,
json_path: pathlib.Path,
inward_only: bool,
deprecation_deadline: Optional[str],
):
if not repr_path.exists() and not json_path.exists():
return
rel_repr_path = f'{repr_path.relative_to(REPO_ROOT)}'
rel_json_path = f'{json_path.relative_to(REPO_ROOT)}'
try:
json_from_file = json_path.read_text()
ctx_manager = (cirq.testing.assert_deprecated(
deadline=deprecation_deadline, count=None)
if deprecation_deadline else contextlib.suppress())
with ctx_manager:
json_obj = cirq.read_json(json_text=json_from_file)
except ValueError as ex: # coverage: ignore
# coverage: ignore
if "Could not resolve type" in str(ex):
mod_path = mod_spec.name.replace(".", "/")
rel_resolver_cache_path = f"{mod_path}/json_resolver_cache.py"
# coverage: ignore
pytest.fail(
f"{rel_json_path} can't be parsed to JSON.\n"
f"Maybe an entry is missing from the "
f" `_class_resolver_dictionary` method in {rel_resolver_cache_path}?"
)
else:
raise ValueError(
f"deprecation: {deprecation_deadline} - got error: {ex}")
except AssertionError as ex: # coverage: ignore
# coverage: ignore
raise ex
except Exception as ex: # coverage: ignore
# coverage: ignore
raise IOError(
f'Failed to parse test json data from {rel_json_path}.') from ex
try:
repr_obj = _eval_repr_data_file(repr_path, deprecation_deadline)
except Exception as ex: # coverage: ignore
# coverage: ignore
raise IOError(
f'Failed to parse test repr data from {rel_repr_path}.') from ex
assert proper_eq(json_obj, repr_obj), (
f'The json data from {rel_json_path} did not parse '
f'into an object equivalent to the repr data from {rel_repr_path}.\n'
f'\n'
f'json object: {json_obj!r}\n'
f'repr object: {repr_obj!r}\n')
if not inward_only:
json_from_cirq = cirq.to_json(repr_obj)
json_from_cirq_obj = json.loads(json_from_cirq)
json_from_file_obj = json.loads(json_from_file)
assert json_from_cirq_obj == json_from_file_obj, (
f'The json produced by cirq no longer agrees with the json in the '
f'{rel_json_path} test data file.\n'
f'\n'
f'You must either fix the cirq code to continue to produce the '
f'same output, or you must move the old test data to '
f'{rel_json_path}_inward and create a fresh {rel_json_path} file.\n'
f'\n'
f'test data json:\n'
f'{json_from_file}\n'
f'\n'
f'cirq produced json:\n'
f'{json_from_cirq}\n')
def test_parses_single_qubit_gate(gate):
assert gate == cirq.read_json(json_text=(cirq.to_json(gate)))