Multiple parameters in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to mark the test function to run with multiple values for parameter 'x'.

PyTest

import pytest

@pytest.mark.parametrize('x', [1])
def test_is_positive(x):
    assert x > 0

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

A{1, 2, 3}

B(1, 2, 3)

C[1, 2, 3]

D'1, 2, 3'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string instead of a list for parameter values.

Using curly braces which create a set, not a list.

The @pytest.mark.parametrize decorator requires an iterable like a list for parameter values. Using a list [1, 2, 3] correctly passes multiple values.

2fill in blank

medium

Complete the code to parametrize two parameters 'a' and 'b' with pairs of values.

PyTest

import pytest

@pytest.mark.parametrize('[1]', [(1, 2), (3, 4)])
def test_sum(a, b):
    assert a + b > 0

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

A'a; b'

B'a b'

C'(a, b)'

D'a, b'

Attempts:

3 left

💡 Hint

Common Mistakes

Using spaces without commas between parameter names.

Including parentheses or semicolons in the parameter string.

The parameter names must be a string with names separated by commas, like 'a, b'.

3fill in blank

hard

Fix the error in the parametrize decorator to correctly pass multiple parameter sets.

PyTest

import pytest

@pytest.mark.parametrize('x, y', [1])
def test_multiply(x, y):
    assert x * y >= 0

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

A[1, 2, 3, 4]

B[(1, 2), (3, 4)]

C[(1, 2), (3,)]

D[(1, 2), 3, 4]

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a list with mixed tuples and integers.

Passing tuples with wrong number of elements.

The parameter values must be a list of tuples, each tuple matching the parameters. Option B correctly provides pairs (tuples) for 'x' and 'y'.

4fill in blank

hard

Fill both blanks to parametrize a test with parameters 'name' and 'age' and two sets of values.

PyTest

import pytest

@pytest.mark.parametrize([1], [2])
def test_person(name, age):
    assert isinstance(name, str) and age > 0

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

A'name, age'

B'age, name'

C[('Alice', 30), ('Bob', 25)]

D[('Alice', 30), ('Bob', '25')]

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping parameter names order without changing values accordingly.

Using a string instead of a list of tuples for values.

The first blank must be the parameter names as a string separated by commas. The second blank must be a list of tuples with matching values. Option C has correct types for both parameters.

5fill in blank

hard

Fill all three blanks to parametrize a test with parameters 'x', 'y', 'expected' and three test cases.

PyTest

import pytest

@pytest.mark.parametrize([1], [2])
def test_add(x, y, expected):
    assert x + y == [3]

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

A'x, y, expected'

B[ (1, 2, 3), (4, 5, 9), (0, 0, 0) ]

Cexpected

Dx + y

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'x + y' in the assertion instead of 'expected'.

Passing incorrect parameter names or values.

The first blank is the parameter names string. The second blank is the list of tuples with test cases. The third blank is the variable 'expected' used in the assertion.