Code review as testing in Testing Fundamentals - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a function has a missing return statement during code review.

Testing Fundamentals

def check_return(func):
    source = func.__code__.co_code
    if [1] not in source:
        return False
    return True

Drag options to blanks, or click blank then click option'

ALOAD_FAST

BRETURN_VALUE

CCALL_FUNCTION

DLOAD_CONST

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing other opcodes like LOAD_CONST or CALL_FUNCTION with return.

The RETURN_VALUE opcode indicates a return statement in Python bytecode. Checking for it helps find missing returns.

2fill in blank

medium

Complete the code to identify if a variable name follows naming conventions during code review.

Testing Fundamentals

def is_valid_var(name):
    import re
    pattern = r'^[a-z_][a-z0-9_]*$'
    return bool(re.match([1], name))

Drag options to blanks, or click blank then click option'

A'^[A-Z][a-zA-Z0-9]*$'

B'^[A-Za-z]+$'

C'^[0-9][a-z_]*$'

D'^[a-z_][a-z0-9_]*$'

Attempts:

3 left

💡 Hint

Common Mistakes

Using patterns that allow uppercase first letters or digits at start.

The pattern '^[a-z_][a-z0-9_]*$' matches valid Python variable names starting with lowercase or underscore.

3fill in blank

hard

Fix the error in the code review function that checks for TODO comments in code.

Testing Fundamentals

def has_todo_comment(code_lines):
    for line in code_lines:
        if '[1]' in line:
            return True
    return False

Drag options to blanks, or click blank then click option'

A"todo"

B"TODO"

C"# TODO"

D"#todo"

Attempts:

3 left

💡 Hint

Common Mistakes

Searching only for 'TODO' without the comment symbol, causing false positives.

Checking for "# TODO" ensures we find proper TODO comments with the hash symbol and uppercase TODO.

4fill in blank

hard

Fill both blanks to create a code review function that finds functions missing docstrings.

Testing Fundamentals

def missing_docstring(func):
    doc = func.__doc__
    if doc is [1] or doc.strip() == [2]:
        return True
    return False

Drag options to blanks, or click blank then click option'

ANone

B""

C"None"

D''

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for string 'None' instead of None type.

A function missing a docstring has __doc__ as None or an empty string "".

5fill in blank

hard

Fill all three blanks to create a code review snippet that collects all function names missing type hints.

Testing Fundamentals

def functions_missing_type_hints(module):
    missing = []
    for name, func in module.__dict__.items():
        if callable(func) and ([1] not in func.__annotations__ or [2] not in func.__annotations__):
            missing.append([3])
    return missing

Drag options to blanks, or click blank then click option'

A"return"

B"param"

Cname

D"return_type"

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect keys for annotations or appending the wrong variable.

Type hints are stored in __annotations__ with keys for parameters and 'return'. Here, 'return' and 'param' are placeholders for keys, and name is appended.