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# ==================================================================================================================== #
# _____ _ _ ____ #
# _ __ _ |_ _|__ ___ | (_)_ __ __ _ / ___|___ _ __ ___ _ __ ___ ___ _ __ #
# | '_ \| | | || |/ _ \ / _ \| | | '_ \ / _` || | / _ \| '_ ` _ \| '_ ` _ \ / _ \| '_ \ #
# | |_) | |_| || | (_) | (_) | | | | | | (_| || |__| (_) | | | | | | | | | | | (_) | | | | #
# | .__/ \__, ||_|\___/ \___/|_|_|_| |_|\__, (_)____\___/|_| |_| |_|_| |_| |_|\___/|_| |_| #
# |_| |___/ |___/ #
# ==================================================================================================================== #
# Authors: #
# Patrick Lehmann #
# #
# License: #
# ==================================================================================================================== #
# Copyright 2017-2025 Patrick Lehmann - Bötzingen, Germany #
# #
# Licensed under the Apache License, Version 2.0 (the "License"); #
# you may not use this file except in compliance with the License. #
# You may obtain a copy of the License at #
# #
# http://www.apache.org/licenses/LICENSE-2.0 #
# #
# Unless required by applicable law or agreed to in writing, software #
# distributed under the License is distributed on an "AS IS" BASIS, #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. #
# See the License for the specific language governing permissions and #
# limitations under the License. #
# #
# SPDX-License-Identifier: Apache-2.0 #
# ==================================================================================================================== #
#
"""
Unit tests for :func:`firstKey`, :func:`firstValue`, :func:`firstPair`, :func:`mergedicts` and :func:`zipdicts`.
"""
from unittest import TestCase
from pytest import mark
from pyTooling.Common import firstKey, firstValue, firstPair, mergedicts, zipdicts
from pyTooling.Platform import CurrentPlatform
if __name__ == "__main__": # pragma: no cover
print("ERROR: you called a testcase declaration file as an executable module.")
print("Use: 'python -m unittest <testcase module>'")
exit(1)
class First(TestCase):
def test_FirstKey0(self) -> None:
d = {}
with self.assertRaises(ValueError):
_ = firstKey(d)
def test_FirstKey1(self) -> None:
d = {"1": 1}
f = firstKey(d)
self.assertEqual("1", f)
def test_FirstKey2(self) -> None:
d = {"1": 1, "2": 2}
f = firstKey(d)
self.assertEqual("1", f)
def test_FirstValue0(self) -> None:
d = {}
with self.assertRaises(ValueError):
_ = firstValue(d)
def test_FirstValue1(self) -> None:
d = {"1": 1}
f = firstValue(d)
self.assertEqual(1, f)
def test_FirstValue2(self) -> None:
d = {"1": 1, "2": 2}
f = firstValue(d)
self.assertEqual(1, f)
def test_FirstPair0(self) -> None:
d = {}
with self.assertRaises(ValueError):
_ = firstPair(d)
def test_FirstPair1(self) -> None:
d = {"1": 1}
f = firstPair(d)
self.assertTupleEqual(("1", 1), f)
def test_FirstPair2(self) -> None:
d = {"1": 1, "2": 2}
f = firstPair(d)
self.assertTupleEqual(("1", 1), f)
class Merge(TestCase):
def test_NoDicts(self) -> None:
with self.assertRaises(ValueError):
_ = mergedicts()
with self.assertRaises(ValueError):
_ = mergedicts(filter=lambda k, v: True)
def test_Merge1(self) -> None:
d1 = {"1": 1, "2": 2}
expected = (
("1", 1),
("2", 2)
)
m = mergedicts(d1)
self.assertTupleEqual(expected, tuple(m.items()))
def test_Merge2(self) -> None:
d1 = {"1": 1, "2": 2}
d2 = {"3": 3, "4": 4}
expected = (
("1", 1),
("2", 2),
("3", 3),
("4", 4)
)
m = mergedicts(d1, d2)
self.assertTupleEqual(expected, tuple(m.items()))
def test_Merge3(self) -> None:
d1 = {"1": 1, "2": 2}
d2 = {"3": 3, "4": 4}
d3 = {"5": 5, "6": 6}
expected = (
("1", 1),
("2", 2),
("3", 3),
("4", 4),
("5", 5),
("6", 6)
)
m = mergedicts(d1, d2, d3)
self.assertTupleEqual(expected, tuple(m.items()))
def test_Merge2Filter(self) -> None:
d1 = {"1": 1, "2": 2}
d2 = {"3": 3, "4": 4}
expected = (
("2", 2),
("4", 4)
)
m = mergedicts(d1, d2, filter=lambda key, value: value % 2 == 0)
self.assertTupleEqual(expected, tuple(m.items()))
class Zip(TestCase):
def test_NoDicts(self) -> None:
with self.assertRaises(ValueError):
_ = zipdicts()
@mark.skipif(CurrentPlatform.IsPyPy and CurrentPlatform.PythonVersion == "3.10", reason="Tuple/list expansion with *foo is broken in pypy-3.10.")
def test_Zip1_1(self) -> None:
d1 = {"a": 1}
d2 = {"b": "2"}
with self.assertRaises(KeyError):
for key, valueA, valueB in zipdicts(d1, d2):
pass
def test_Zip1_2(self) -> None:
d1 = {"a": 1}
d2 = {"a": "1", "b": "2"}
with self.assertRaises(ValueError):
_ = zipdicts(d1, d2)
def test_Zip2_1(self) -> None:
d1 = {"a": 1, "b": 2}
d2 = {"a": "1"}
with self.assertRaises(ValueError):
_ = zipdicts(d1, d2)
def test_Zip2_2(self) -> None:
d1 = {"a": 1, "b": 2}
d2 = {"a": "1", "b": "2"}
expected = (
("a", 1, "1"),
("b", 2, "2"),
)
z = zipdicts(d1, d2)
self.assertTupleEqual(expected, tuple(z))
def test_Iterate(self) -> None:
d1 = {"a": 1, "b": 2}
d2 = {"a": "1", "b": "2"}
expected = (
("a", 1, "1"),
("b", 2, "2"),
)
i = 0
for key, value1, value2 in zipdicts(d1, d2):
self.assertTupleEqual(expected[i], (key, value1, value2))
i += 1
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