jocafernanro/tdd_workshop_2.0

A simple TDD workshop with exercises. Version 2.0

tdd_workshop_2.0

A simple TDD workshop with exercises. 2.0 version (1.0 version: https://github.com/jocafernanro/tdd_workshop)

Calculator TDD exercise

Implement a basic calculator following the TDD principles and good practices.

Functionalities

• Addition (+):
  • Sum two natural numbers
  • No negative values
  • Just numbers. Don't accept any other type of data
• Subtraction (-):
  • Subtract one natural number from another.
  • No negative results (ensure first number is always greater or equal to the second).
  • Accept only numbers, no other data types.
• Multiplication (*):
  • Multiply two natural numbers.
  • No negative values.
  • Accept only numbers, no other data types.
  • Multiplying any number by zero should return zero.
• Division (/):
  • Divide one natural number by another.
  • No negative values.
  • Accept only numbers, no other data types.
  • Division by zero is not allowed and should be handled appropriately.
• Check if a Number is Odd
  • Determine if a given natural number is odd.
  • Accept only natural numbers, no other data types.
  • Negative numbers or zero should not be considered.
• Check if a Number is Even
  • Determine if a given natural number is even.
  • Accept only natural numbers, no other data types.
  • Negative numbers or zero should not be considered.

Test cases

Addition

• Sum 4 + 6: Expected result 10.
• Sum 20 + 3: Expected result 23.
• Sum 0 + 7: Expected result 7.
• Sum 0 + 0: Expected result 0.
• Sum with Non-Number (e.g., 'a' + 5): Expected to throw an error.

Subtraction

• Subtract 5 - 3: Expected result 2.
• Subtract 20 - 7: Expected result 13.
• Subtract 3 - 3: Expected result 0.
• Subtract with Non-Number (e.g., 5 - 'b'): Expected to throw an error.
• Subtract 3 - 5: Expected to handle/throw an error (no negative results).

Multiplication

• Multiply 4 * 3: Expected result 12.
• Multiply 5 * 10: Expected result 50.
• Multiply 5 * 0: Expected result 0.
• Multiply with Non-Number (e.g., 'a' * 2): Expected to throw an error.
• Multiply 0 * 0: Expected result 0.

Division

• Divide 6 / 3: Expected result 2.
• Divide 25 / 5: Expected result 5.
• Divide 5 / 0: Expected to throw an error or handle it.
• Divide with Non-Number (e.g., 9 / 'c'): Expected to throw an error.
• Divide 0 / 3: Expected result 0.

Check if a Number is Odd

• Check Odd for 3: Expected result true.
• Check Odd for 6: Expected result true.
• Check Odd for 4: Expected result false.
• Check Odd for 0: Expected to throw an error or handle it.
• Check Odd with Non-Number (e.g., 'a'): Expected to throw an error.

Check if a Number is Even

• Check Even for 4: Expected result true.
• Check Even for 8: Expected result true.
• Check Even for 3: Expected result false.
• Check Even for 0: Expected to throw an error or handle it.
• Check Even with Non-Number (e.g., 'b'): Expected to throw an error.

Commands

Install dependencies: npm install

Run all tests: npm run tests

Run all tests and watch changes: npm run tests:watch