Assignment 6: A Fibonacci series iterable

Write an iterable which produces an iterator of the Fibonacci series for a given value.

Example:

>>> [number for number in Fibonacci(10)]
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]

(/7) Structure & naming

• (/1) Write a test module called test_fibonacci.py
• (/1) Write a module called fibonacci.py
• (/5) Create an iterable class called Fibonacci which requires a single positional argument. Remember, an iterable class has to:
  • Have an __iter__
  • Have a __next__
  • Raise a StopIteration exception when there are no more items

Requirements & build steps

Using TDD methodology, develop an algorithm to assert the following test cases.

Note: iterables return iterators and not lists, so to build a proper assertion, cast the result as a list.

assert list(Fibonacci(2)) == [0, 1, 1]

1. If constructed with a value other than an integer, the Fibonacci constructor should raise a ValueError.
2. Given a constructor value of 0, the iterator should produce the values [0] if cast as a list.
3. Given a constructor value of 1, the iterator should produce the values [0, 1] if cast as a list.
4. Given a constructor value of 2, the iterator should produce the values [0, 1, 1].
5. Given a value of 4, the iterator should produce [0, 1, 1, 2, 3]
6. Given a value of 10, the iterator should produce [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55]
7. Given a negative value, the iterator should produce an empty list.

Note: Any integer must be accepted and calculate a correct Fibonacci sequence. Building a function which only handles the above cases is insufficient and will not be accepted.

(/21) Development matrix

Step	Test assertion	Code written to pass	Commit Exists
#1
#2
#3
#4
#5
#6
#7

Code style

Tests & codestyle must pass. -1% will be deducted for each code style violation.