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test_schema.py
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test_schema.py
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from __future__ import with_statement
import os
from pytest import raises
from schema import Schema, Use, And, Or, Optional, SchemaError
try:
basestring
except NameError:
basestring = str # Python 3 does not have basestring
SE = raises(SchemaError)
def ve(_):
raise ValueError()
def se(_):
raise SchemaError('first auto', 'first error')
def test_schema():
assert Schema(1).validate(1) == 1
with SE: Schema(1).validate(9)
assert Schema(int).validate(1) == 1
with SE: Schema(int).validate('1')
assert Schema(Use(int)).validate('1') == 1
with SE: Schema(int).validate(int)
assert Schema(str).validate('hai') == 'hai'
with SE: Schema(str).validate(1)
assert Schema(Use(str)).validate(1) == '1'
assert Schema(list).validate(['a', 1]) == ['a', 1]
assert Schema(dict).validate({'a': 1}) == {'a': 1}
with SE: Schema(dict).validate(['a', 1])
assert Schema(lambda n: 0 < n < 5).validate(3) == 3
with SE: Schema(lambda n: 0 < n < 5).validate(-1)
def test_validate_file():
assert Schema(
Use(open)).validate('LICENSE-MIT').read().startswith('Copyright')
with SE: Schema(Use(open)).validate('NON-EXISTENT')
assert Schema(os.path.exists).validate('.') == '.'
with SE: Schema(os.path.exists).validate('./non-existent/')
assert Schema(os.path.isfile).validate('LICENSE-MIT') == 'LICENSE-MIT'
with SE: Schema(os.path.isfile).validate('NON-EXISTENT')
def test_and():
assert And(int, lambda n: 0 < n < 5).validate(3) == 3
with SE: And(int, lambda n: 0 < n < 5).validate(3.33)
assert And(Use(int), lambda n: 0 < n < 5).validate(3.33) == 3
with SE: And(Use(int), lambda n: 0 < n < 5).validate('3.33')
def test_or():
assert Or(int, dict).validate(5) == 5
assert Or(int, dict).validate({}) == {}
with SE: Or(int, dict).validate('hai')
assert Or(int).validate(4)
with SE: Or().validate(2)
def test_validate_list():
assert Schema([1, 0]).validate([1, 0, 1, 1]) == [1, 0, 1, 1]
assert Schema([1, 0]).validate([]) == []
with SE: Schema([1, 0]).validate(0)
with SE: Schema([1, 0]).validate([2])
assert And([1, 0], lambda l: len(l) > 2).validate([0, 1, 0]) == [0, 1, 0]
with SE: And([1, 0], lambda l: len(l) > 2).validate([0, 1])
def test_list_tuple_set_frozenset():
assert Schema([int]).validate([1, 2])
with SE: Schema([int]).validate(['1', 2])
assert Schema(set([int])).validate(set([1, 2])) == set([1, 2])
with SE: Schema(set([int])).validate([1, 2]) # not a set
with SE: Schema(set([int])).validate(['1', 2])
assert Schema(tuple([int])).validate(tuple([1, 2])) == tuple([1, 2])
with SE: Schema(tuple([int])).validate([1, 2]) # not a set
def test_strictly():
assert Schema(int).validate(1) == 1
with SE: Schema(int).validate('1')
def test_dict():
assert Schema({'key': 5}).validate({'key': 5}) == {'key': 5}
with SE: Schema({'key': 5}).validate({'key': 'x'})
assert Schema({'key': int}).validate({'key': 5}) == {'key': 5}
assert Schema({'n': int, 'f': float}).validate(
{'n': 5, 'f': 3.14}) == {'n': 5, 'f': 3.14}
with SE: Schema({'n': int, 'f': float}).validate(
{'n': 3.14, 'f': 5})
with SE:
try:
Schema({'key': 5}).validate({})
except SchemaError as e:
assert e.args[0] in ["missed keys set(['key'])",
"missed keys {'key'}"] # Python 3 style
raise
with SE:
try:
Schema({'key': 5}).validate({'n': 5})
except SchemaError as e:
assert e.args[0] in ["missed keys set(['key'])",
"missed keys {'key'}"] # Python 3 style
raise
with SE:
try:
Schema({}).validate({'n': 5})
except SchemaError as e:
assert e.args[0] == "wrong keys 'n' in {'n': 5}"
raise
with SE:
try:
Schema({'key': 5}).validate({'key': 5, 'bad': 5})
except SchemaError as e:
assert e.args[0] in ["wrong keys 'bad' in {'key': 5, 'bad': 5}",
"wrong keys 'bad' in {'bad': 5, 'key': 5}"]
raise
with SE:
try:
Schema({}).validate({'a': 5, 'b': 5})
except SchemaError as e:
assert e.args[0] in ["wrong keys 'a', 'b' in {'a': 5, 'b': 5}",
"wrong keys 'a', 'b' in {'b': 5, 'a': 5}"]
raise
def test_dict_keys():
assert Schema({str: int}).validate(
{'a': 1, 'b': 2}) == {'a': 1, 'b': 2}
with SE: Schema({str: int}).validate({1: 1, 'b': 2})
assert Schema({Use(str): Use(int)}).validate(
{1: 3.14, 3.14: 1}) == {'1': 3, '3.14': 1}
def test_dict_optional_keys():
with SE: Schema({'a': 1, 'b': 2}).validate({'a': 1})
assert Schema({'a': 1, Optional('b'): 2}).validate({'a': 1}) == {'a': 1}
assert Schema({'a': 1, Optional('b'): 2}).validate(
{'a': 1, 'b': 2}) == {'a': 1, 'b': 2}
def test_complex():
s = Schema({'<file>': And([Use(open)], lambda l: len(l)),
'<path>': os.path.exists,
Optional('--count'): And(int, lambda n: 0 <= n <= 5)})
data = s.validate({'<file>': ['./LICENSE-MIT'], '<path>': './'})
assert len(data) == 2
assert len(data['<file>']) == 1
assert data['<file>'][0].read().startswith('Copyright')
assert data['<path>'] == './'
def test_nice_errors():
try:
Schema(int, error='should be integer').validate('x')
except SchemaError as e:
assert e.errors == ['should be integer']
try:
Schema(Use(float), error='should be a number').validate('x')
except SchemaError as e:
assert e.code == 'should be a number'
try:
Schema({Optional('i'): Use(int, error='should be a number')}).validate({'i': 'x'})
except SchemaError as e:
assert e.code == 'should be a number'
def test_use_error_handling():
try:
Use(ve).validate('x')
except SchemaError as e:
assert e.autos == ["ve('x') raised ValueError()"]
assert e.errors == [None]
try:
Use(ve, error='should not raise').validate('x')
except SchemaError as e:
assert e.autos == ["ve('x') raised ValueError()"]
assert e.errors == ['should not raise']
try:
Use(se).validate('x')
except SchemaError as e:
assert e.autos == [None, 'first auto']
assert e.errors == [None, 'first error']
try:
Use(se, error='second error').validate('x')
except SchemaError as e:
assert e.autos == [None, 'first auto']
assert e.errors == ['second error', 'first error']
def test_or_error_handling():
try:
Or(ve).validate('x')
except SchemaError as e:
assert e.autos[0].startswith('Or(')
assert e.autos[0].endswith(") did not validate 'x'")
assert e.autos[1] == "ve('x') raised ValueError()"
assert len(e.autos) == 2
assert e.errors == [None, None]
try:
Or(ve, error='should not raise').validate('x')
except SchemaError as e:
assert e.autos[0].startswith('Or(')
assert e.autos[0].endswith(") did not validate 'x'")
assert e.autos[1] == "ve('x') raised ValueError()"
assert len(e.autos) == 2
assert e.errors == ['should not raise', 'should not raise']
try:
Or('o').validate('x')
except SchemaError as e:
assert e.autos == ["Or('o') did not validate 'x'",
"'o' does not match 'x'"]
assert e.errors == [None, None]
try:
Or('o', error='second error').validate('x')
except SchemaError as e:
assert e.autos == ["Or('o') did not validate 'x'",
"'o' does not match 'x'"]
assert e.errors == ['second error', 'second error']
def test_and_error_handling():
try:
And(ve).validate('x')
except SchemaError as e:
assert e.autos == ["ve('x') raised ValueError()"]
assert e.errors == [None]
try:
And(ve, error='should not raise').validate('x')
except SchemaError as e:
assert e.autos == ["ve('x') raised ValueError()"]
assert e.errors == ['should not raise']
try:
And(str, se).validate('x')
except SchemaError as e:
assert e.autos == [None, 'first auto']
assert e.errors == [None, 'first error']
try:
And(str, se, error='second error').validate('x')
except SchemaError as e:
assert e.autos == [None, 'first auto']
assert e.errors == ['second error', 'first error']
def test_schema_error_handling():
try:
Schema(Use(ve)).validate('x')
except SchemaError as e:
assert e.autos == [None, "ve('x') raised ValueError()"]
assert e.errors == [None, None]
try:
Schema(Use(ve), error='should not raise').validate('x')
except SchemaError as e:
assert e.autos == [None, "ve('x') raised ValueError()"]
assert e.errors == ['should not raise', None]
try:
Schema(Use(se)).validate('x')
except SchemaError as e:
assert e.autos == [None, None, 'first auto']
assert e.errors == [None, None, 'first error']
try:
Schema(Use(se), error='second error').validate('x')
except SchemaError as e:
assert e.autos == [None, None, 'first auto']
assert e.errors == ['second error', None, 'first error']
def test_use_json():
import json
gist_schema = Schema(And(Use(json.loads), # first convert from JSON
{Optional('description'): basestring,
'public': bool,
'files': {basestring: {'content': basestring}}}))
gist = '''{"description": "the description for this gist",
"public": true,
"files": {
"file1.txt": {"content": "String file contents"},
"other.txt": {"content": "Another file contents"}}}'''
assert gist_schema.validate(gist)
def test_error_reporting():
s = Schema({'<files>': [Use(open, error='<files> should be readable')],
'<path>': And(os.path.exists, error='<path> should exist'),
'--count': Or(None, And(Use(int), lambda n: 0 < n < 5),
error='--count should be integer 0 < n < 5')},
error='Error:')
s.validate({'<files>': [], '<path>': './', '--count': 3})
try:
s.validate({'<files>': [], '<path>': './', '--count': '10'})
except SchemaError as e:
assert e.code == 'Error:\n--count should be integer 0 < n < 5'
try:
s.validate({'<files>': [], '<path>': './hai', '--count': '2'})
except SchemaError as e:
assert e.code == 'Error:\n<path> should exist'
try:
s.validate({'<files>': ['hai'], '<path>': './', '--count': '2'})
except SchemaError as e:
assert e.code == 'Error:\n<files> should be readable'
def test_schema_repr(): # what about repr with `error`s?
schema = Schema([Or(None, And(str, Use(float)))])
repr_ = "Schema([Or(None, And(<type 'str'>, Use(<type 'float'>)))])"
# in Python 3 repr contains <class 'str'>, not <type 'str'>
assert repr(schema).replace('class', 'type') == repr_
def test_validate_object():
schema = Schema({object: str})
assert schema.validate({42: 'str'}) == {42: 'str'}
with SE: schema.validate({42: 777})
def test_issue_9_prioritized_key_comparison():
validate = Schema({'key': 42, object: 42}).validate
assert validate({'key': 42, 777: 42}) == {'key': 42, 777: 42}
def test_issue_9_prioritized_key_comparison_in_dicts():
# http://stackoverflow.com/questions/14588098/docopt-schema-validation
s = Schema({'ID': Use(int, error='ID should be an int'),
'FILE': Or(None, Use(open, error='FILE should be readable')),
Optional(str): object})
data = {'ID': 10, 'FILE': None, 'other': 'other', 'other2': 'other2'}
assert s.validate(data) == data
data = {'ID': 10, 'FILE': None}
assert s.validate(data) == data