def test_dict_serialization():
"""Test that a dictionary can be serialized and then deserialized as a gemd object."""
process = ProcessRun("A process")
mat = MaterialRun("A material", process=process)
meas = MeasurementRun("A measurement", material=mat)
copy = loads(dumps(meas.as_dict()))
assert copy == meas
def test_substitution_without_id():
"""Test that trying to substitute links if uids haven't been assigned throws an error."""
mat = MaterialRun("A material with no id")
meas = MeasurementRun("A measurement with no id", material=mat)
with pytest.raises(ValueError):
substitute_links(meas), "subbed = substitute_links should fail if objects don't have uids"
with pytest.raises(ValueError):
substitute_links([meas, mat]), \
"subbed = substitute_links should fail if objects don't have uids"
with pytest.raises(ValueError):
substitute_links(meas.as_dict()), \
"subbed = substitute_links should fail if objects don't have uids"
# Create a dictionary in which either the key or value is missing a uid
meas.add_uid('id', str(uuid4()))
with pytest.raises(ValueError):
substitute_links({mat: meas}), \
"subbed = substitute_links should fail if objects don't have uids"
with pytest.raises(ValueError):
substitute_links({meas: mat}), \
"subbed = substitute_links should fail if objects don't have uids"