Addopts for default options in PyTest - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding pytest addopts default behavior

What is the effect of adding --maxfail=2 --disable-warnings to the addopts option in pytest.ini?

A Pytest will ignore the first 2 failures and show warnings only for errors.

B Pytest will run only 2 tests and show all warnings.

C Pytest will stop after 2 test failures and suppress all warning messages during test runs.

D Pytest will run tests twice and disable all error messages.

💡 Hint

Think about what --maxfail and --disable-warnings do individually.

The --maxfail=2 option tells pytest to stop testing after 2 failures. The --disable-warnings option suppresses warning messages during the test run.

❓ Predict Output

intermediate

Output of pytest with addopts for verbosity

Given the following pytest.ini configuration:

[pytest]
addopts = -v

and a test file test_sample.py with two passing tests, what will be the output style when running pytest?

PyTest

def test_one():
    assert 1 == 1

def test_two():
    assert 2 == 2

A Pytest will show only dots for each passing test without names.

B Pytest will show detailed test names and statuses for each test (verbose output).

C Pytest will stop after the first test and show no output.

D Pytest will show warnings and errors but no test results.

💡 Hint

What does the -v option do in pytest?

The -v option increases verbosity, showing each test's name and result instead of just dots.

❓ assertion

advanced

Correct assertion to verify addopts effect

You have set addopts = --tb=short in pytest.ini. Which assertion correctly verifies that the traceback style is short during test failure?

PyTest

def test_fail():
    assert False

A assert pytest.config.getoption('tb') == 'short'

B assert 'short' in pytest.config.getoption('tbstyle')

C assert '--tb=short' in pytest.config.getoption('addopts')

D assert 'short' in pytest.config.getoption('tb')

💡 Hint

Check how to access the traceback style option in pytest.

The traceback style is accessed via getoption('tb'). The value should be 'short' if --tb=short is set.

🔧 Debug

advanced

Debugging addopts syntax error in pytest.ini

Which addopts line in pytest.ini will cause a syntax error when pytest tries to parse it?

A addopts = --maxfail=3 --disable-warnings

B addopts = --maxfail=3 --disable-warnings --tb=short

C addopts = --maxfail=3 --tb=short

D addopts = --maxfail=3 --disable warnings

💡 Hint

Look carefully at the spacing in the options.

Option D has a space in --disable warnings which is invalid. It should be --disable-warnings without spaces.

❓ framework

expert

Effect of addopts on pytest test discovery

If addopts in pytest.ini includes --ignore=tests/integration, what will happen when you run pytest?

A Pytest will skip all tests inside the <code>tests/integration</code> directory during discovery.

B Pytest will only run tests inside <code>tests/integration</code> and ignore others.

C Pytest will run all tests but mark those in <code>tests/integration</code> as expected failures.

D Pytest will fail to start due to invalid addopts syntax.

💡 Hint

What does the --ignore option do in pytest?

The --ignore option tells pytest to skip the specified path during test discovery, so tests in that directory won't run.