What are some TDD challenges I can try in Java?

What are some TDD challenges I can try in Java?

Here are a few TDD challenges you can try in Java:

1. Create a simple calculator.
2. Build a to-do list application.
3. Develop a basic banking system.
4. Implement a game like Tic-Tac-Toe.
5. Create a library management system.

Can you give me an example of how to implement the calculator challenge?

Sure! Start by writing a test for the addition method:

@Test
public void testAddition() {
    Calculator calculator = new Calculator();
    assertEquals(5, calculator.add(2, 3));
}

Then, implement the method in the Calculator class.

What if I want to add more operations like subtraction and multiplication?

You can follow the same pattern! Write tests for each operation first, then implement them one by one. For example, for subtraction:

@Test
public void testSubtraction() {
    Calculator calculator = new Calculator();
    assertEquals(1, calculator.subtract(3, 2));
}

How do I handle edge cases in TDD?

Handling edge cases is crucial! Write tests for scenarios like dividing by zero or adding very large numbers. This ensures your code is robust.