Question

Functions test

Answer 1

To test the function, we can create different test cases and check if the function produces the expected output for each case. Here's an example of how we can test a simple function that adds two numbers:

```python
def add_numbers(a, b):
return a + b

def test_add_numbers():
# Test case 1: Positive numbers
assert add_numbers(1, 2) == 3

# Test case 2: Negative numbers
assert add_numbers(-1, -2) == -3

# Test case 3: One positive, one negative number
assert add_numbers(2, -3) == -1

# Test case 4: Zeroes
assert add_numbers(0, 0) == 0

test_add_numbers()
```

In this example, we define a function `add_numbers` that takes two arguments `a` and `b` and returns their sum. We also define a test function `test_add_numbers` that contains four test cases. Each test case asserts that the output of `add_numbers` matches the expected output.

To run the tests, we call `test_add_numbers()` at the end. If all the assertions pass, there will be no output. However, if any assertion fails, an `AssertionError` will be raised and the line number where it occurred will be displayed. This helps identify which test case failed and what the expected output was.