mncheck/mncheck/ext/cerberus/tests/test_schema.py

# -*- coding: utf-8 -*-

import pytest

from cerberus import Validator, errors, SchemaError
from cerberus.schema import UnvalidatedSchema
from cerberus.tests import assert_schema_error


def test_empty_schema():
    validator = Validator()
    with pytest.raises(SchemaError, message=errors.SCHEMA_ERROR_MISSING):
        validator({}, schema=None)


def test_bad_schema_type(validator):
    schema = "this string should really be dict"
    exp_msg = errors.SCHEMA_ERROR_DEFINITION_TYPE.format(schema)
    with pytest.raises(SchemaError, message=exp_msg):
        validator.schema = schema


def test_bad_schema_type_field(validator):
    field = 'foo'
    schema = {field: {'schema': {'bar': {'type': 'strong'}}}}
    with pytest.raises(SchemaError):
        validator.schema = schema


def test_unknown_rule(validator):
    message = "{'foo': [{'unknown': ['unknown rule']}]}"
    with pytest.raises(SchemaError, message=message):
        validator.schema = {'foo': {'unknown': 'rule'}}


def test_unknown_type(validator):
    field = 'name'
    value = 'catch_me'
    message = str({field: [{'type': ['unallowed value %s' % value]}]})
    with pytest.raises(SchemaError, message=message):
        validator.schema = {'foo': {'unknown': 'rule'}}


def test_bad_schema_definition(validator):
    field = 'name'
    message = str({field: ['must be of dict type']})
    with pytest.raises(SchemaError, message=message):
        validator.schema = {field: 'this should really be a dict'}


def test_bad_of_rules():
    schema = {'foo': {'anyof': {'type': 'string'}}}
    assert_schema_error({}, schema)


def test_normalization_rules_are_invalid_in_of_rules():
    schema = {0: {'anyof': [{'coerce': lambda x: x}]}}
    assert_schema_error({}, schema)


def test_anyof_allof_schema_validate():
    # make sure schema with 'anyof' and 'allof' constraints are checked
    # correctly
    schema = {'doc': {'type': 'dict',
                      'anyof': [
                          {'schema': [{'param': {'type': 'number'}}]}]}}
    assert_schema_error({'doc': 'this is my document'}, schema)

    schema = {'doc': {'type': 'dict',
                      'allof': [
                          {'schema': [{'param': {'type': 'number'}}]}]}}
    assert_schema_error({'doc': 'this is my document'}, schema)


def test_repr():
    v = Validator({'foo': {'type': 'string'}})
    assert repr(v.schema) == "{'foo': {'type': 'string'}}"


def test_validated_schema_cache():
    v = Validator({'foozifix': {'coerce': int}})
    cache_size = len(v._valid_schemas)

    v = Validator({'foozifix': {'type': 'integer'}})
    cache_size += 1
    assert len(v._valid_schemas) == cache_size

    v = Validator({'foozifix': {'coerce': int}})
    assert len(v._valid_schemas) == cache_size

    max_cache_size = 147
    assert cache_size <= max_cache_size, \
        "There's an unexpected high amount (%s) of cached valid " \
        "definition schemas. Unless you added further tests, " \
        "there are good chances that something is wrong. " \
        "If you added tests with new schemas, you can try to " \
        "adjust the variable `max_cache_size` according to " \
        "the added schemas." % cache_size


def test_expansion_in_nested_schema():
    schema = {'detroit': {'schema': {'anyof_regex': ['^Aladdin', 'Sane$']}}}
    v = Validator(schema)
    assert (v.schema['detroit']['schema'] ==
            {'anyof': [{'regex': '^Aladdin'}, {'regex': 'Sane$'}]})


def test_unvalidated_schema_can_be_copied():
    schema = UnvalidatedSchema()
    schema_copy = schema.copy()
    assert schema_copy == schema