Test-driven development (TDD) concept in Testing Fundamentals - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to write a failing test first in TDD.

Testing Fundamentals

def test_addition():
    result = add(2, 3)
    assert result == [1]

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A7

B5

C6

D4

Attempts:

3 left

💡 Hint

Common Mistakes

Writing the correct expected value first, which makes the test pass immediately.

In TDD, you first write a test that fails. Here, the function add(2, 3) should return 5, but we put 4 to make the test fail initially.

2fill in blank

medium

Complete the code to implement the function after writing the failing test.

Testing Fundamentals

def add(a, b):
    return [1]

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Aa + b

Ba - b

Ca * b

Da / b

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

After writing a failing test, you implement the function correctly. Here, add should return the sum of a and b.

3fill in blank

hard

Fix the error in the test assertion to correctly check the function output.

Testing Fundamentals

def test_addition():
    result = add(1, 4)
    assert result [1] 5

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A!=

B>

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using != which checks for inequality and causes the test to fail.

The assertion should check if the result equals 5 to pass the test.

4fill in blank

hard

Fill both blanks to complete the TDD cycle: write test, implement, then refactor.

Testing Fundamentals

def test_multiply():
    result = multiply(2, 3)
    assert result [1] 6

def multiply(a, b):
    return a [2] b

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A==

B*

C+

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using + instead of * for multiplication.

Using != instead of == in the assertion.

The test asserts that multiply(2, 3) equals 6, and the function returns the product using the * operator.

5fill in blank

hard

Fill all three blanks to write a test, implement the function, and add a new test for edge case.

Testing Fundamentals

def test_divide():
    result = divide(6, 3)
    assert result [1] 2

def divide(a, b):
    return a [2] b

def test_divide_by_zero():
    try:
        divide(5, 0)
    except [3]:
        pass
    else:
        assert False, "Expected exception"

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A==

B/

CZeroDivisionError

DValueError

Attempts:

3 left

💡 Hint

Common Mistakes

Using ValueError instead of ZeroDivisionError.

Using != instead of == in the test assertion.

The test checks if divide(6, 3) equals 2 using ==. The function divides a by b using /. The edge case test expects a ZeroDivisionError when dividing by zero.