def test_merge_semantics(data, s1, s2):
assume(canonicalish(s1) != FALSEY and canonicalish(s2) != FALSEY)
combined = merged([s1, s2])
assume(combined is not None)
assert combined == merged([s2, s1]) # union is commutative
assume(combined != FALSEY)
_merge_semantics_helper(data, s1, s2, combined)
def test_canonicalises_to_equivalent_fixpoint(schema_strategy, data):
"""Check that an object drawn from an arbitrary schema is valid."""
schema = data.draw(schema_strategy, label="schema")
cc = canonicalish(schema)
assert cc == canonicalish(cc)
instance = data.draw(JSON_STRATEGY | from_schema(cc), label="instance")
assert is_valid(instance, schema) == is_valid(instance, cc)
jsonschema.validators.validator_for(schema).check_schema(schema)
def test_can_almost_always_merge_numeric_schemas(data, s1, s2):
assume(canonicalish(s1) != FALSEY and canonicalish(s2) != FALSEY)
combined = merged([s1, s2])
if combined is None:
# The ONLY case in which we can't merge numeric schemas is when
# they both contain multipleOf keys with distinct non-integer values.
mul1, mul2 = s1["multipleOf"], s2["multipleOf"]
assert isinstance(mul1, float) or isinstance(mul2, float)
assert mul1 != mul2
elif combined != FALSEY:
_merge_semantics_helper(data, s1, s2, combined)
def test_dependencies_canonicalises_to_fixpoint():
"""Check that an object drawn from an arbitrary schema is valid."""
cc = canonicalish({
"required": [""],
"properties": {
"": {}
},
"dependencies": {
"": [""]
}
})
assert cc == canonicalish(cc)
def test_merge_semantics(data, s1, s2):
assume(canonicalish(s1) != FALSEY and canonicalish(s2) != FALSEY)
combined = merged([s1, s2])
assume(combined is not None)
assume(combined != FALSEY)
note(combined)
ic = data.draw(from_schema(combined), label="combined")
i1 = data.draw(from_schema(s1), label="s1")
i2 = data.draw(from_schema(s2), label="s2")
assert is_valid(ic, s1) and is_valid(ic, s2)
assert is_valid(i1, s2) == is_valid(i1, combined)
assert is_valid(i2, s1) == is_valid(i2, combined)
def test_canonicalises_to_equivalent_fixpoint(schema_strategy, data):
"""Check that an object drawn from an arbitrary schema is valid."""
schema = data.draw(schema_strategy, label="schema")
cc = canonicalish(schema)
assert cc == canonicalish(cc)
try:
strat = from_schema(cc)
except InvalidArgument:
# e.g. array of unique {type: integers}, with too few allowed integers
assume(False)
instance = data.draw(JSON_STRATEGY | strat, label="instance")
assert is_valid(instance, schema) == is_valid(instance, cc)
jsonschema.validators.validator_for(schema).check_schema(schema)
def _canonicalises_to_equivalent_fixpoint(data):
# This function isn't executed by pytest, only by FuzzBuzz - we want to parametrize
# over schemas for differnt types there, but have to supply *all* args here.
schema = data.draw(json_schemata(), label="schema")
cc = canonicalish(schema)
assert cc == canonicalish(cc)
try:
strat = from_schema(cc)
except InvalidArgument:
# e.g. array of unique {type: integers}, with too few allowed integers
assume(False)
instance = data.draw(JSON_STRATEGY | strat, label="instance")
assert is_valid(instance, schema) == is_valid(instance, cc)
jsonschema.validators.validator_for(schema).check_schema(schema)
def test_generated_data_matches_schema(schema_strategy, data):
"""Check that an object drawn from an arbitrary schema is valid."""
schema = data.draw(schema_strategy)
note(schema)
try:
value = data.draw(from_schema(schema), "value from schema")
except InvalidArgument:
reject()
jsonschema.validate(value, schema)
# This checks that our canonicalisation is semantically equivalent.
jsonschema.validate(value, canonicalish(schema))
def test_validators_use_proper_draft():
# See GH-66
schema = {
"$schema": "http://json-schema.org/draft-04/schema#",
"not": {
"allOf": [
{"exclusiveMinimum": True, "minimum": 0},
{"exclusiveMaximum": True, "maximum": 10},
]
},
}
cc = canonicalish(schema)
jsonschema.validators.validator_for(cc).check_schema(cc)
def test_reference_resolver_issue_65_regression():
schema = {
"allOf": [{"$ref": "#/definitions/ref"}, {"required": ["foo"]}],
"properties": {"foo": {}},
"definitions": {"ref": {"maxProperties": 1}},
"type": "object",
}
res = resolve_all_refs(schema)
can = canonicalish(res)
assert "$ref" not in res
assert "$ref" not in can
for s in (schema, res, can):
with pytest.raises(jsonschema.ValidationError):
jsonschema.validate({}, s)
def test_generated_data_matches_schema(schema_strategy, data):
"""Check that an object drawn from an arbitrary schema is valid."""
schema = data.draw(schema_strategy)
note(schema)
try:
value = data.draw(from_schema(schema), "value from schema")
except InvalidArgument:
reject()
try:
jsonschema.validate(value, schema)
# This checks that our canonicalisation is semantically equivalent.
jsonschema.validate(value, canonicalish(schema))
except jsonschema.ValidationError as err:
if "'uniqueItems': True" in str(err):
pytest.xfail("https://github.com/Julian/jsonschema/issues/686")
raise
def negate_constraints(context: MutationContext, draw: Draw,
schema: Schema) -> MutationResult:
"""Negate schema constrains while keeping the original type."""
if canonicalish(schema) == {}:
return MutationResult.FAILURE
copied = schema.copy()
schema.clear()
is_negated = False
def is_mutation_candidate(k: str) -> bool:
# Should we negate this key?
return not (k in ("type", "properties", "items", "minItems") or
(k == "additionalProperties"
and context.is_header_location))
enabled_keywords = draw(st.shared(FeatureStrategy(),
key="keywords")) # type: ignore
candidates = []
mutation_candidates = [key for key in copied if is_mutation_candidate(key)]
if mutation_candidates:
# There should be at least one mutated keyword
candidate = draw(
st.sampled_from(
[key for key in copied if is_mutation_candidate(key)]))
candidates.append(candidate)
# If the chosen candidate has dependency, then the dependency should also be present in the final schema
if candidate in DEPENDENCIES:
candidates.append(DEPENDENCIES[candidate])
for key, value in copied.items():
if is_mutation_candidate(key):
if key in candidates or enabled_keywords.is_enabled(key):
is_negated = True
negated = schema.setdefault("not", {})
negated[key] = value
if key in DEPENDENCIES:
# If this keyword has a dependency, then it should be also negated
dependency = DEPENDENCIES[key]
if dependency not in negated:
negated[dependency] = copied[
dependency] # Assuming the schema is valid
else:
schema[key] = value
if is_negated:
return MutationResult.SUCCESS
return MutationResult.FAILURE
def test_prevent_unsatisfiable_schema(schema, new_type):
prevent_unsatisfiable_schema(schema, new_type)
assert canonicalish(schema) != FALSEY
def test_canonicalise_is_only_valid_for_schemas():
with pytest.raises(InvalidArgument):
canonicalish("not a schema")
def test_self_merge_eq_canonicalish(schema):
m = merged([schema, schema])
assert m == canonicalish(schema)
def test_no_unsatisfiable_schemas(data):
schema = {"type": "object", "required": ["foo"]}
mutated_schema = data.draw(
mutated(schema, location="body", media_type="application/json"))
assert canonicalish(mutated_schema) != FALSEY
def test_canonicalises_to_expected(schema, expected):
assert canonicalish(schema) == expected, (schema, canonicalish(schema),
expected)
def test_canonicalises_to_empty(schema):
assert canonicalish(schema) == {"not": {}}, (schema, canonicalish(schema))