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from collections import namedtuple
from typing import Iterator
from unittest import TestCase
from xsdata.utils import collections
class CollectionsTests(TestCase):
def test_find(self):
self.assertEqual(-1, collections.find([0, 1], 2))
self.assertEqual(1, collections.find([0, 1], 1))
def test_prepend(self):
target = [1, 2, 3]
prepend_values = [4, 5, 6]
collections.prepend(target, *prepend_values)
self.assertEqual([4, 5, 6, 1, 2, 3], target)
def test_remove(self):
self.assertEqual([1, 3], collections.remove([1, 2, 2, 3], lambda x: x == 2))
self.assertEqual([2, 2, 3], collections.remove([1, 2, 2, 3], lambda x: x == 1))
self.assertEqual([3], collections.remove([1, 2, 2, 3], lambda x: x < 3))
def test_is_array(self):
fixture = namedtuple("fixture", ["a", "b"])
self.assertFalse(collections.is_array(1))
self.assertFalse(collections.is_array(fixture(1, 2)))
self.assertTrue(collections.is_array([]))
self.assertTrue(collections.is_array(()))
self.assertTrue(collections.is_array(frozenset()))
def test_connected_components(self):
lists = [[1, 2, 3], [4], [3, 4], [6]]
actual = collections.connected_components(lists)
self.assertIsInstance(actual, Iterator)
self.assertEqual([[1, 2, 3, 4], [6]], list(actual))
def test_find_connected_component(self):
groups = [[1, 2, 3], [4, 5, 6]]
actual = collections.find_connected_component(groups, 1)
self.assertEqual(0, actual)
actual = collections.find_connected_component(groups, 2)
self.assertEqual(0, actual)
actual = collections.find_connected_component(groups, 4)
self.assertEqual(1, actual)
actual = collections.find_connected_component(groups, 100)
self.assertEqual(-1, actual)
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