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""" |
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:mod:`tests.unit.test_digital` -- Unit Tests |
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============================================ |
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.. module:: tests.unit.test_digital |
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:synopsis: Unit tests for the lib.digital module. |
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.. moduleauthor:: Bill Maroney <[email protected]> |
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""" |
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from typing import List, Union |
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import pytest |
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class TestDigitSum(object): |
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""" A collection of positive and negative unit tests for the :func:`lib.digital.digit_sum` function """ |
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@classmethod |
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def get_import(cls): |
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""" Get and return the :func:`lib.digital.digit_sum` function |
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.. note:: this isolates the import so any error/exception is raised by individual unit tests. |
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:return: the :func:`lib.digital.digit_sum` function |
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""" |
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from lib.digital import digit_sum |
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return digit_sum |
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@pytest.mark.parametrize("value,expected_answer", [(0, 0), (9, 9), (11, 2), (123, 6), (654321, 21)]) |
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def test_digit_sum_correctness(self, value: int, expected_answer: int): |
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""" Test the correctness of :func:`lib.digital.digit_sum` using known answer tests |
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:param value: the input value |
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:param expected_answer: the expected answer |
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:raises AssertionError: if :func:`lib.digital.digit_sum` returns the wrong type |
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:raises AssertionError: if :func:`lib.digital.digit_sum` returns the wrong value |
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""" |
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digit_sum = self.get_import() |
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computed_answer = digit_sum(value) |
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assert isinstance(computed_answer, digit_sum.__annotations__["return"]), "wrong type" |
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assert computed_answer == expected_answer, "wrong answer" |
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def test_digit_sum_bad_n_type_str(self): |
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""" Test that :func:`lib.digital.digit_sum` raises a ``TypeError`` for a non-``int`` value for `n` (``str``) """ |
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digit_sum = self.get_import() |
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with pytest.raises(TypeError): |
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digit_sum("123") |
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def test_digit_sum_bad_n_type_float(self): |
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""" Test that :func:`lib.digital.digit_sum` raises a ``TypeError`` for a non-``int`` value for `n` (``float``) |
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""" |
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digit_sum = self.get_import() |
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with pytest.raises(TypeError): |
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digit_sum(123.0) |
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def test_digit_sum_bad_n_negative(self): |
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""" Test that :func:`lib.digital.digit_sum` raises a ``ValueError`` for a negative value for `n` """ |
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digit_sum = self.get_import() |
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with pytest.raises(ValueError): |
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digit_sum(-123) |
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def test_digit_sum_bad_base_type_str(self): |
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""" Test that :func:`lib.digital.digit_sum` raises a ``TypeError`` for a non-``int`` value for `base` (``str``) |
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""" |
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digit_sum = self.get_import() |
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with pytest.raises(TypeError): |
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digit_sum(123, base="2") |
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def test_digit_sum_bad_base_type_float(self): |
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""" Test that :func:`lib.digital.digit_sum` raises a ``TypeError`` for a non-``int`` value for `base` |
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(``float``) |
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""" |
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digit_sum = self.get_import() |
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with pytest.raises(TypeError): |
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digit_sum(123, base=2.0) |
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def test_digit_sum_bad_base_negative(self): |
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""" Test that :func:`lib.digital.digit_sum` raises a ``ValueError`` for a negative value for `base` """ |
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digit_sum = self.get_import() |
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with pytest.raises(ValueError): |
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digit_sum(123, base=-2) |
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class TestNumDigits(object): |
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""" A collection of positive and negative unit tests for the :func:`lib.digital.num_digits` function """ |
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@classmethod |
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def get_import(cls): |
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""" Get and return the :func:`lib.digital.num_digits` function |
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.. note:: this isolates the import so any error/exception is raised by individual unit tests. |
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:return: the :func:`lib.digital.num_digits` function |
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""" |
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from lib.digital import num_digits |
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return num_digits |
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@pytest.mark.parametrize("value,expected_answer", |
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[(0, 1), (9, 1), (10, 2), (55, 2), (99, 2), (100, 3), (999, 3), (1000, 4)]) |
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def test_num_digits_correctness_kat(self, value: int, expected_answer: int): |
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""" Test the correctness of :func:`lib.digital.num_digits` using known answer tests |
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:param value: the input value |
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:param expected_answer: the expected answer |
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:raises AssertionError: if :func:`lib.digital.num_digits` returns the wrong type |
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:raises AssertionError: if :func:`lib.digital.num_digits` returns the wrong value |
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""" |
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num_digits = self.get_import() |
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computed_answer = num_digits(value) |
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assert isinstance(computed_answer, num_digits.__annotations__["return"]), "wrong type" |
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assert computed_answer == expected_answer, "wrong answer" |
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def test_num_digits_correctness_random(self): |
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""" Test the correctness of :func:`lib.digital.num_digits` using random inputs with predictable answers |
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That is, generate a random length (`n`) and a random integer of that length (`x`). Then, check that |
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:func:`lib.digital.num_digits` evaluated at `x` equals `n`. |
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:raises AssertionError: if :func:`lib.digital.num_digits` returns the wrong type |
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:raises AssertionError: if :func:`lib.digital.num_digits` returns the wrong value |
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""" |
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from random import randint |
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num_digits = self.get_import() |
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for i in range(1000): # a moderate but arbitrary number of random tests |
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digit_len = randint(1, 50) # a moderate but arbitrary length (n) |
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random_integer = randint(10 ** (digit_len - 1), 10 ** digit_len - 1) # the random number (x) |
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computed_answer = num_digits(random_integer) |
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assert isinstance(computed_answer, num_digits.__annotations__["return"]), "wrong type" |
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assert computed_answer == digit_len, "wrong answer" |
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def test_num_digits_bad_n_type_str(self): |
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""" Test that :func:`lib.digital.num_digits` raises a ``TypeError`` for a non-``int`` value for `n` (``str``) |
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""" |
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num_digits = self.get_import() |
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with pytest.raises(TypeError): |
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num_digits("123") |
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def test_num_digits_bad_n_type_float(self): |
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""" Test that :func:`lib.digital.num_digits` raises a ``TypeError`` for a non-``int`` value for `n` (``float``) |
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""" |
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num_digits = self.get_import() |
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with pytest.raises(TypeError): |
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num_digits(123.0) |
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def test_num_digits_bad_n_negative(self): |
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""" Test that :func:`lib.digital.num_digits` raises a ``ValueError`` for a negative value for `n` """ |
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num_digits = self.get_import() |
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with pytest.raises(ValueError): |
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num_digits(-123) |
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def test_num_digits_bad_base_type_str(self): |
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""" Test that :func:`lib.digital.num_digits` raises a ``TypeError`` for a non-``int`` value for `base` (``str``) |
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""" |
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num_digits = self.get_import() |
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with pytest.raises(TypeError): |
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num_digits(123, base="2") |
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def test_num_digits_bad_base_type_float(self): |
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""" Test that :func:`lib.digital.num_digits` raises a ``TypeError`` for a non-``int`` value for `base` |
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(``float``) |
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""" |
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num_digits = self.get_import() |
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with pytest.raises(TypeError): |
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num_digits(123, base=2.0) |
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def test_num_digits_bad_base_negative(self): |
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""" Test that :func:`lib.digital.num_digits` raises a ``ValueError`` for a negative value for `base` """ |
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num_digits = self.get_import() |
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with pytest.raises(ValueError): |
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num_digits(123, base=-2) |
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class TestIsPandigital(object): |
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""" A collection of positive and negative unit tests for the :func:`lib.digital.is_pandigital` function """ |
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@classmethod |
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def get_import(cls): |
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""" Get and return the :func:`lib.digital.is_pandigital` function |
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.. note:: this isolates the import so any error/exception is raised by individual unit tests. |
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184
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185
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:return: the :func:`lib.digital.is_pandigital` function |
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""" |
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from lib.digital import is_pandigital |
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return is_pandigital |
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@pytest.mark.parametrize("value,d,expected_answer", |
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[(123, 3, True), (200, 3, False), (123, 4, False), ([1, 25, 43], 5, True), |
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([1, 2, 2], 3, False), ([1, 2, 3, 4], 3, False)]) |
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def test_is_pandigital_correctness(self, value: Union[int, List[int]], d: int, expected_answer: int): |
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194
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""" Test the correctness of :func:`lib.digital.is_pandigital` using known answer tests |
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196
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:param value: the input value |
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:param d: parameter in `d`-pandigital |
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:param expected_answer: the expected answer |
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:raises AssertionError: if :func:`lib.digital.is_pandigital` returns the wrong type |
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:raises AssertionError: if :func:`lib.digital.is_pandigital` returns the wrong value |
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""" |
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is_pandigital = self.get_import() |
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computed_answer = is_pandigital(value, d) |
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assert isinstance(computed_answer, is_pandigital.__annotations__["return"]), "wrong type" |
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assert computed_answer == expected_answer, "wrong answer" |
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207
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208
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def test_is_pandigital_bad_int_n_type_str(self): |
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209
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `n` (``str``) |
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210
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""" |
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211
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is_pandigital = self.get_import() |
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212
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with pytest.raises(TypeError): |
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is_pandigital("123", 3) |
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214
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215
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def test_is_pandigital_bad_int_n_type_float(self): |
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216
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `n` |
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217
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(``float``) |
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218
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""" |
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219
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is_pandigital = self.get_import() |
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220
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with pytest.raises(TypeError): |
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221
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is_pandigital(123.0, 3) |
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222
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223
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def test_is_pandigital_bad_list_n_type_str(self): |
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224
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `n` (``str``) |
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225
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""" |
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226
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is_pandigital = self.get_import() |
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227
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with pytest.raises(TypeError): |
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228
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is_pandigital([1, 2, "3"], 3) |
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229
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230
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def test_is_pandigital_bad_list_n_type_float(self): |
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231
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `n` |
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232
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(``float``) |
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233
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""" |
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234
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is_pandigital = self.get_import() |
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235
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with pytest.raises(TypeError): |
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236
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is_pandigital([1, 2.3], 3) |
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237
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238
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def test_is_pandigital_bad_int_n_negative(self): |
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239
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""" Test that :func:`lib.digital.is_pandigital` raises a ``ValueError`` for a negative value for `n` """ |
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240
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is_pandigital = self.get_import() |
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241
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with pytest.raises(ValueError): |
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242
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is_pandigital(-123, 3) |
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243
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244
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def test_is_pandigital_bad_list_n_negative(self): |
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245
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""" Test that :func:`lib.digital.is_pandigital` raises a ``ValueError`` for a negative value for `n` """ |
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246
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is_pandigital = self.get_import() |
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247
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with pytest.raises(ValueError): |
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248
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is_pandigital([-1, 2, 3], 3) |
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249
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250
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def test_is_pandigital_bad_d_type_str(self): |
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251
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `d` (``str``) |
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252
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""" |
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is_pandigital = self.get_import() |
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with pytest.raises(TypeError): |
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is_pandigital(123, "3") |
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257
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def test_is_pandigital_bad_d_type_float(self): |
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `d` |
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259
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(``float``) |
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""" |
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is_pandigital = self.get_import() |
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with pytest.raises(TypeError): |
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is_pandigital(123, 3.0) |
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264
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265
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def test_is_pandigital_bad_d_negative(self): |
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266
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""" Test that :func:`lib.digital.is_pandigital` raises a ``ValueError`` for a negative value for `d` """ |
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267
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is_pandigital = self.get_import() |
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with pytest.raises(ValueError): |
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is_pandigital(123, -3) |
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270
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271
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def test_is_pandigital_bad_lower_type_str(self): |
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272
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `lower` |
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273
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(``str``) |
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""" |
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is_pandigital = self.get_import() |
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276
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with pytest.raises(TypeError): |
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277
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is_pandigital([1, 2, 3], 3, lower="10") |
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278
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279
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def test_is_pandigital_bad_lower_type_float(self): |
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280
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `lower` |
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281
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(``float``) |
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282
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""" |
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283
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is_pandigital = self.get_import() |
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284
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with pytest.raises(TypeError): |
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285
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is_pandigital([1, 2, 3], 3, lower=10.0) |
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286
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287
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def test_is_pandigital_bad_lower_negative(self): |
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288
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""" Test that :func:`lib.digital.is_pandigital` raises a ``ValueError`` for a negative value for `lower` """ |
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289
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is_pandigital = self.get_import() |
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290
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with pytest.raises(ValueError): |
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291
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is_pandigital(123, 3, lower=-10) |
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292
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293
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def test_is_pandigital_bad_base_type_str(self): |
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294
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `base` |
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295
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(``str``) |
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296
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""" |
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297
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is_pandigital = self.get_import() |
|
298
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with pytest.raises(TypeError): |
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299
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is_pandigital(123, 3, base="10") |
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300
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301
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def test_is_pandigital_bad_base_type_float(self): |
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302
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""" Test that :func:`lib.digital.is_pandigital` raises a ``TypeError`` for a non-``int`` value for `base` |
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303
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(``float``) |
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304
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""" |
|
305
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is_pandigital = self.get_import() |
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306
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with pytest.raises(TypeError): |
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307
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is_pandigital(123, 3, base=2.0) |
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308
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309
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def test_is_pandigital_bad_base_negative(self): |
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310
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""" Test that :func:`lib.digital.is_pandigital` raises a ``ValueError`` for a negative value for `base` """ |
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311
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is_pandigital = self.get_import() |
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312
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|
with pytest.raises(ValueError): |
|
313
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|
is_pandigital(123, 3, base=-10) |
|
314
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315
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316
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class TestIsPalindrome(object): |
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|
317
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|
""" A collection of positive and negative unit tests for the :func:`lib.digital.is_palindrome` function """ |
|
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|
318
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|
319
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|
|
@classmethod |
|
320
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|
def get_import(cls): |
|
321
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|
|
""" Get and return the :func:`lib.digital.is_palindrome` function |
|
322
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|
|
323
|
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|
.. note:: this isolates the import so any error/exception is raised by individual unit tests. |
|
|
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|
324
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|
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|
|
325
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|
|
:return: the :func:`lib.digital.is_palindrome` function |
|
326
|
|
|
""" |
|
327
|
|
|
from lib.digital import is_palindrome |
|
328
|
|
|
return is_palindrome |
|
329
|
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|
330
|
|
|
@pytest.mark.parametrize("value,base,expected_answer", [(121, 10, True), (123, 10, False), (5, 2, True)]) |
|
|
|
|
|
|
331
|
|
|
def test_is_palindrome_correctness(self, value: int, base: int, expected_answer: int): |
|
332
|
|
|
""" Test the correctness of :func:`lib.digital.is_palindrome` using known answer tests |
|
333
|
|
|
|
|
334
|
|
|
:param value: the input value |
|
335
|
|
|
:param base: consider `value` in the given `base` |
|
336
|
|
|
:param expected_answer: the expected answer |
|
337
|
|
|
:raises AssertionError: if :func:`lib.digital.is_palindrome` returns the wrong type |
|
338
|
|
|
:raises AssertionError: if :func:`lib.digital.is_palindrome` returns the wrong value |
|
339
|
|
|
""" |
|
340
|
|
|
|
|
341
|
|
|
is_palindrome = self.get_import() |
|
342
|
|
|
computed_answer = is_palindrome(value, base=base) |
|
343
|
|
|
assert isinstance(computed_answer, is_palindrome.__annotations__["return"]), "wrong type" |
|
344
|
|
|
assert computed_answer == expected_answer, "wrong answer" |
|
345
|
|
|
|
|
346
|
|
|
def test_is_palindrome_bad_n_type_str(self): |
|
|
|
|
|
|
347
|
|
|
""" Test that :func:`lib.digital.is_palindrome` raises a ``TypeError`` for a non-``int`` value for `n` (``str``) |
|
|
|
|
|
|
348
|
|
|
""" |
|
349
|
|
|
is_palindrome = self.get_import() |
|
350
|
|
|
with pytest.raises(TypeError): |
|
351
|
|
|
is_palindrome("123") |
|
352
|
|
|
|
|
353
|
|
|
def test_is_palindrome_bad_n_type_float(self): |
|
|
|
|
|
|
354
|
|
|
""" Test that :func:`lib.digital.is_palindrome` raises a ``TypeError`` for a non-``int`` value for `n` |
|
|
|
|
|
|
355
|
|
|
(``float``) |
|
356
|
|
|
""" |
|
357
|
|
|
is_palindrome = self.get_import() |
|
358
|
|
|
with pytest.raises(TypeError): |
|
359
|
|
|
is_palindrome(123.0) |
|
360
|
|
|
|
|
361
|
|
|
def test_is_palindrome_bad_n_negative(self): |
|
|
|
|
|
|
362
|
|
|
""" Test that :func:`lib.digital.is_palindrome` raises a ``ValueError`` for a negative value for `n` """ |
|
|
|
|
|
|
363
|
|
|
is_palindrome = self.get_import() |
|
364
|
|
|
with pytest.raises(ValueError): |
|
365
|
|
|
is_palindrome(-123) |
|
366
|
|
|
|
|
367
|
|
|
def test_is_palindrome_bad_base_type_str(self): |
|
|
|
|
|
|
368
|
|
|
""" Test that :func:`lib.digital.is_palindrome` raises a ``TypeError`` for a non-``int`` value for `base` |
|
|
|
|
|
|
369
|
|
|
(``str``) |
|
370
|
|
|
""" |
|
371
|
|
|
is_palindrome = self.get_import() |
|
372
|
|
|
with pytest.raises(TypeError): |
|
373
|
|
|
is_palindrome(123, base="2") |
|
374
|
|
|
|
|
375
|
|
|
def test_is_palindrome_bad_base_type_float(self): |
|
|
|
|
|
|
376
|
|
|
""" Test that :func:`lib.digital.is_palindrome` raises a ``TypeError`` for a non-``int`` value for `base` |
|
|
|
|
|
|
377
|
|
|
(``float``) |
|
378
|
|
|
""" |
|
379
|
|
|
is_palindrome = self.get_import() |
|
380
|
|
|
with pytest.raises(TypeError): |
|
381
|
|
|
is_palindrome(123, base=2.0) |
|
382
|
|
|
|
|
383
|
|
|
def test_is_palindrome_bad_base_negative(self): |
|
|
|
|
|
|
384
|
|
|
""" Test that :func:`lib.digital.is_palindrome` raises a ``ValueError`` for a negative value for `base` """ |
|
|
|
|
|
|
385
|
|
|
is_palindrome = self.get_import() |
|
386
|
|
|
with pytest.raises(ValueError): |
|
387
|
|
|
is_palindrome(123, base=-2) |
|
388
|
|
|
|
|
389
|
|
|
@pytest.mark.parametrize("base", [1, 3, 4, 5, 6, 7, 9, 11, 12, 13, 14, 15, 200]) |
|
390
|
|
|
def test_is_palindrome_unsupported_base(self, base: int): |
|
|
|
|
|
|
391
|
|
|
""" Test that :func:`lib.digital.is_palindrome` raises a ``ValueError`` for unsupported values of `base` |
|
|
|
|
|
|
392
|
|
|
|
|
393
|
|
|
:param base: consider `value` in the given `base` |
|
394
|
|
|
""" |
|
395
|
|
|
|
|
396
|
|
|
is_palindrome = self.get_import() |
|
397
|
|
|
with pytest.raises(ValueError): |
|
398
|
|
|
is_palindrome(111, base=base) |
|
399
|
|
|
|
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