Viewing file:  issequence_onlycontaining.py (1.8 KB) -rw-r--r--
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from typing import Sequence, TypeVar, Union
from hamcrest.core.base_matcher import BaseMatcher
from hamcrest.core.core.anyof import any_of
from hamcrest.core.description import Description
from hamcrest.core.helpers.wrap_matcher import wrap_matcher
from hamcrest.core.matcher import Matcher
__author__ = "Jon Reid"
__copyright__ = "Copyright 2011 hamcrest.org"
__license__ = "BSD, see License.txt"
T = TypeVar("T")
class IsSequenceOnlyContaining(BaseMatcher[Sequence[T]]):
def __init__(self, matcher: Matcher[T]) -> None:
self.matcher = matcher
def _matches(self, item: Sequence[T]) -> bool:
try:
sequence = list(item)
if len(sequence) == 0:
return False
for element in sequence:
if not self.matcher.matches(element):
return False
return True
except TypeError:
return False
def describe_to(self, description: Description) -> None:
description.append_text("a sequence containing items matching ").append_description_of(
self.matcher
)
def only_contains(*items: Union[Matcher[T], T]) -> Matcher[Sequence[T]]:
"""Matches if each element of sequence satisfies any of the given matchers.
:param match1,...: A comma-separated list of matchers.
This matcher iterates the evaluated sequence, confirming whether each
element satisfies any of the given matchers.
Example::
only_contains(less_than(4))
will match ``[3,1,2]``.
Any argument that is not a matcher is implicitly wrapped in an
:py:func:`~hamcrest.core.core.isequal.equal_to` matcher to check for
equality.
"""
matchers = []
for item in items:
matchers.append(wrap_matcher(item))
return IsSequenceOnlyContaining(any_of(*matchers))
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