def test_schema_extend_overrides():
"""Verify that Schema.extend can override required/extra parameters."""
base = Schema({'a': int}, required=True)
extended = base.extend({'b': str}, required=False, extra=ALLOW_EXTRA)
assert base.required is True
assert base.extra == PREVENT_EXTRA
assert extended.required is False
assert extended.extra == ALLOW_EXTRA
def test_schema_extend_key_swap():
"""Verify that Schema.extend can replace keys, even when different markers are used"""
base = Schema({Optional('a'): int})
extension = {Required('a'): int}
extended = base.extend(extension)
assert_equal(len(base.schema), 1)
assert_true(isinstance(list(base.schema)[0], Optional))
assert_equal(len(extended.schema), 1)
assert_true((list(extended.schema)[0], Required))
def test_schema_extend():
"""Verify that Schema.extend copies schema keys from both."""
base = Schema({'a': int}, required=True)
extension = {'b': str}
extended = base.extend(extension)
assert base.schema == {'a': int}
assert extension == {'b': str}
assert extended.schema == {'a': int, 'b': str}
assert extended.required == base.required
assert extended.extra == base.extra
def test_subschema_extension():
"""Verify that Schema.extend adds and replaces keys in a subschema"""
base = Schema({'a': {'b': int, 'c': float}})
extension = {'d': str, 'a': {'b': str, 'e': int}}
extended = base.extend(extension)
assert_equal(base.schema, {'a': {'b': int, 'c': float}})
assert_equal(extension, {'d': str, 'a': {'b': str, 'e': int}})
assert_equal(extended.schema, {
'a': {
'b': str,
'c': float,
'e': int
},
'd': str
})