2021.10 #41
@ -11,6 +11,7 @@ from .._query.distinct import distinct_query
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from .._query.element_at import element_at_query, element_at_or_default_query
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from .._query.first import first_or_default_query, first_query
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from .._query.for_each import for_each_query
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from .._query.last import last_query, last_or_default_query
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from .._query.order_by import order_by_query, order_by_descending_query
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from .._query.single import single_query, single_or_default_query
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from .._query.where import where_query
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@ -48,6 +49,12 @@ class Iterable(IterableABC):
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def element_at_or_default(self, index: int) -> Optional[any]:
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return element_at_or_default_query(self, index)
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def last(self) -> any:
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return last_query(self)
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def last_or_default(self) -> Optional[any]:
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return last_or_default_query(self)
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def first(self) -> any:
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return first_query(self)
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24
src/cpl_query/_query/last.py
Normal file
24
src/cpl_query/_query/last.py
Normal file
@ -0,0 +1,24 @@
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from typing import Optional
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from cpl_query.exceptions import ArgumentNoneException, ExceptionArgument, IndexOutOfRangeException
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from cpl_query.extension.iterable_abc import IterableABC
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def last_query(_list: IterableABC) -> any:
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if _list is None:
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raise ArgumentNoneException(ExceptionArgument.list)
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if len(_list) == 0:
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raise IndexOutOfRangeException()
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return _list[len(_list) - 1]
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def last_or_default_query(_list: IterableABC) -> Optional[any]:
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if _list is None:
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raise ArgumentNoneException(ExceptionArgument.list)
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if len(_list) == 0:
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return None
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return _list[len(_list) - 1]
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@ -32,6 +32,12 @@ class IterableABC(ABC, list):
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@abstractmethod
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def element_at_or_default(self, index: int) -> Optional[any]: pass
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@abstractmethod
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def last(self) -> any: pass
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@abstractmethod
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def last_or_default(self) -> any: pass
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@abstractmethod
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def first(self) -> any: pass
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@ -100,8 +100,31 @@ class QueryTest(unittest.TestCase):
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self.assertEqual(self._tests[index], self._tests.element_at_or_default(index))
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self.assertIsNone(self._tests.element_at_or_default(len(self._tests)))
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test = [1, 2, 3]
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t = test[100]
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def test_last(self):
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results = []
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for user in self._tests:
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if user.address.nr == 10:
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results.append(user)
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res = self._tests.where(lambda u: u.address.nr == 10)
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s_res = self._tests.where(lambda u: u.address.nr == 10).last()
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self.assertEqual(len(res), len(results))
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self.assertEqual(res[len(res) - 1], s_res)
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def test_last_or_default(self):
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results = []
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for user in self._tests:
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if user.address.nr == 10:
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results.append(user)
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res = self._tests.where(lambda u: u.address.nr == 10)
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s_res = self._tests.where(lambda u: u.address.nr == 10).last_or_default()
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sn_res = self._tests.where(lambda u: u.address.nr == 11).last_or_default()
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self.assertEqual(len(res), len(results))
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self.assertEqual(res[len(res) - 1], s_res)
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self.assertIsNone(sn_res)
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def test_first(self):
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results = []
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@ -113,7 +136,7 @@ class QueryTest(unittest.TestCase):
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s_res = self._tests.where(lambda u: u.address.nr == 10).first()
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self.assertEqual(len(res), len(results))
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self.assertIsNotNone(s_res)
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self.assertEqual(res[0], s_res)
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def test_first_or_default(self):
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results = []
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@ -126,7 +149,7 @@ class QueryTest(unittest.TestCase):
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sn_res = self._tests.where(lambda u: u.address.nr == 11).first_or_default()
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self.assertEqual(len(res), len(results))
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self.assertIsNotNone(s_res)
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self.assertEqual(res[0], s_res)
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self.assertIsNone(sn_res)
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def test_for_each(self):
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