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Solution Notebook¶

Problem: Implement foo(val), which returns val¶

Constraints
Test Cases
Algorithm
Code
Unit Test

Constraints¶

Does foo do anything else?
- No

Test Cases¶

foo(val) -> val

Algorithm¶

Return the input, val

Complexity:

Time: O(1)
Space: O(1)

Code¶

In [1]:

def foo(val):
    return val

Unit Test¶

In [2]:

%%writefile test_foo.py
import unittest


class TestFoo(unittest.TestCase):

    def test_foo(self):
        self.assertEqual(foo(None), None)
        self.assertEqual(foo(0), 0)
        self.assertEqual(foo('bar'), 'bar')
        print('Success: test_foo')


def main():
    test = TestFoo()
    test.test_foo()


if __name__ == '__main__':
    main()

Overwriting test_foo.py

In [3]:

%run -i test_foo.py

Success: test_foo