How to Write Complex `Pytest` Skip Decorators?

In pytest, decorators can be used to skip certain tests based on certain conditions. To write complex skip decorators in pytest, you can use the @pytest.mark.skipif decorator to skip a test based on a certain condition. You can also create custom skip decorators using the pytest.skip function along with custom conditions. Another option is to use the @pytest.fixture decorator to skip certain fixtures based on conditions. By using these techniques, you can create complex skip logic in your pytest tests to skip certain tests or fixtures based on specific conditions.

What is the syntax for writing skip decorators in pytest?

The syntax for writing skip decorators in pytest is as follows:

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import pytest

# Skip a test function with a specific reason
@pytest.mark.skip(reason="reason for skipping")
def test_function_to_skip():
    assert False

# Skip a test function conditionally
@pytest.mark.skipif(condition, reason="reason for skipping")
def test_function_to_skip_conditionally():
    assert False

In the above example, you can use the @pytest.mark.skip decorator to skip a test function with a specific reason, or the @pytest.mark.skipif decorator to skip a test function conditionally based on a specified condition.

How to apply multiple skip decorators to a single test in pytest?

To apply multiple skip decorators to a single test in pytest, you can simply add multiple skip decorators before the test function definition. Each skip decorator will check a specific condition and skip the test if that condition is met.

Here is an example of applying multiple skip decorators to a single test:

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import pytest

@pytest.mark.skip(reason="Skipping this test for a specific reason")
@pytest.mark.skipif(condition=True, reason="Skipping this test because of a condition")
def test_example():
    assert 1 + 2 == 3

In this example, the test_example function has two skip decorators applied to it - one using @pytest.mark.skip and the other using @pytest.mark.skipif. The first decorator will skip the test with a specific reason, while the second decorator will skip the test if a specific condition is met.

When you run the test using pytest, it will be skipped if either of the conditions specified in the skip decorators is met.

How to skip a test in pytest if certain environment variables are not present?

You can skip a test in pytest if certain environment variables are not present by using the pytest skipif decorator along with the os.getenv() function to check for the existence of the environment variables.

Here is an example code snippet:

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import os
import pytest

@pytest.mark.skipif(not os.getenv('ENV_VAR1') or not os.getenv('ENV_VAR2'), reason="Skipping test due to missing environment variables")
def test_example():
    # Test code here
    assert True

In this example, the test_example test will be skipped if either ENV_VAR1 or ENV_VAR2 environment variables are not present. The reason parameter in the @pytest.mark.skipif decorator provides an explanation for why the test is being skipped.