Retaining data on failed tests

By default, failed tests will clean up any temporary directories they created. Sometimes when debugging a failed test, it can be more helpful to leave the directory behind for further manual inspection.

Setting the environment variable IBCTEST_SKIP_FAILURE_CLEANUP to any non-empty value will cause the test to skip deletion of the temporary directories. Any tests that fail and skip cleanup will log a message like Not removing temporary directory for test at: /tmp/....

Test authors must use interchaintest.TempDir (opens in a new tab) instead of (*testing.T).Cleanup to opt in to this behavior.

By default, Docker volumes associated with tests are cleaned up at the end of each test run. That same IBCTEST_SKIP_FAILURE_CLEANUP controls whether the volumes associated with failed tests are pruned.