exam3.py

"""
You must make two of the testcases pass to pass the test.

run tests with `python3 -m unittest exam1.py`
"""
from unittest import TestCase


class EasyTestCase(TestCase):
    """
    Arguments:
        a - a number
        b - a number

    Returns:
        A string with format "$A minus $B is $C."
        Where "$A" is `a`, "$B" is `b`, and "$C" is `a - b`

    >>> test_function(3, 1)
    '3 minus 1 is 2.'
    """

    def setUp(self):
        self.test_function = None  # Assign to your function

    def test_ex1(self):
        result = self.test_function(1, 3)
        expected = '1 minus 3 is -2.'
        self.assertEqual(result, expected)

    def test_ex2(self):
        result = self.test_function(5, 2)
        expected = '5 minus 2 is 3.'
        self.assertEqual(result, expected)


class AreNumbersTestCase(TestCase):
    """
    Arguments:
        l: a list of strings

    Returns:
        a dictionary mapping strings to a boolean value.
        if all the characters in an element of `l` is are numbers,
        that element is mapped to `True`.
        If any character in an element of `l` is not a number,
        that element is mapped to `False`

    >>> test_function(['1', '2b', 'a'])
    # '1' is only a number, '2b' and 'a' have characters that are not numbers
    {'1': True, '2b': False, 'a': False}

    HINT:
        to determine if a string only has numbers, use the method `isdigits`
        >>> my_string = '1'
        >>> my_string.isdigit()
        True
    """
    def setUp(self):
        self.test_function = None  # Assign to your function

    def test_ex1(self):
        result = self.test_function(['5', 'g'])
        expected = {'5': True, 'g': False}
        self.assertEqual(result, expected)

    def test_ex2(self):
        result = self.test_function(['6', '7', 'u'])
        expected = {'6': True, '7': True, 'u': False}
        self.assertEqual(result, expected)


class CountdownTestCase(TestCase):
    """
    Arguments:
        t: number to start from

    Returns:
        A list of numbers starting with `t`. Each following
        element is (the previous element) - 1. this continues
        until the last element is `1`.

    >>> test_function(3)
    [3, 2, 1]
    """
    def setUp(self):
        self.test_function = None  # Assign to your function

    def test_ex1(self):
        result = self.test_function(5)
        expected = [5, 4, 3, 2, 1]
        self.assertEqual(result, expected)

    def test_ex2(self):
        result = self.test_function(2)
        expected = [2, 1]
        self.assertEqual(result, expected)