Sometimes there are issues with the infrastructure, a temporary glitch, and the test fails, so we retry them. How do you handle this?

Temporary infrastructure failures causing test failures are a common situation. To work effectively with this, several approaches are used:

1. Retry (rerun the test) — automatically rerun the test upon failure to exclude false positives caused by temporary glitches.
2. Identify unstable tests — analyze which tests frequently fail due to infrastructure issues and mark them for special attention.
3. Logging and monitoring — collect logs and metrics to understand the causes of failures.
4. Isolate the test environment — minimize external factors, for example, by using containers or virtual machines.
5. Improve infrastructure — address root causes of failures based on analysis.

An example of retry in Python using pytest and the flaky plugin:

import pytest

@pytest.mark.flaky(reruns=3, reruns_delay=2)
def test_example():
    assert some_unstable_operation()

This approach helps increase the stability of the test forecast and reduce noise from temporary infrastructure issues.