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iotests: Write test output to TEST_DIR

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Drop the use of OUTPUT_DIR (test/qemu-iotests under the build
directory), and instead write test output files (.out.bad, .notrun, and
.casenotrun) to TEST_DIR.

With this, the same test can be run concurrently without the separate
instances interfering, because they will need separate TEST_DIRs anyway.
Running the same test separately is useful when running the iotests with
various format/protocol combinations in parallel, or when you just want
to aggressively exercise a single test (e.g. when it fails only
sporadically).

Putting this output into TEST_DIR means that it will stick around for
inspection after the test run is done (though running the same test in
the same TEST_DIR will overwrite it, just as it used to be); but given
that TEST_DIR is a scratch directory, it should be clear that users can
delete all of its content at any point.  (And if TEST_DIR is on tmpfs,
it will just disappear on shutdown.)  Contrarily, alternative approaches
that would put these output files into OUTPUT_DIR with some prefix to
differentiate between separate test runs might easily lead to cluttering
OUTPUT_DIR.

(This change means OUTPUT_DIR is no longer written to by the iotests, so
we can drop its usage altogether.)

Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220221172909.762858-1-hreitz@redhat.com>
[hreitz: Simplified `Path(os.path.join(x, y))` to `Path(x, y)`, as
         suggested by Vladimir; and rebased on 9086c76398
         ("tests/qemu-iotests: Rework the checks and spots using GNU
         sed")]
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
This commit is contained in:
Hanna Reitz 2022-02-21 18:29:09 +01:00
parent db4b2133b8
commit 1a8fcca03f
4 changed files with 14 additions and 16 deletions
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5
tests/qemu-iotests/testenv.py
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@ -66,7 +66,7 @@ class TestEnv(ContextManager['TestEnv']):
# pylint: disable=too-many-instance-attributes
env_variables = ['PYTHONPATH', 'TEST_DIR', 'SOCK_DIR', 'SAMPLE_IMG_DIR',
'OUTPUT_DIR', 'PYTHON', 'QEMU_PROG', 'QEMU_IMG_PROG',
'PYTHON', 'QEMU_PROG', 'QEMU_IMG_PROG',
'QEMU_IO_PROG', 'QEMU_NBD_PROG', 'QSD_PROG',
'QEMU_OPTIONS', 'QEMU_IMG_OPTIONS',
'QEMU_IO_OPTIONS', 'QEMU_IO_OPTIONS_NO_FMT',
@ -106,7 +106,6 @@ class TestEnv(ContextManager['TestEnv']):
TEST_DIR
SOCK_DIR
SAMPLE_IMG_DIR
OUTPUT_DIR
"""
# Path where qemu goodies live in this source tree.
@ -134,8 +133,6 @@ class TestEnv(ContextManager['TestEnv']):
os.path.join(self.source_iotests,
'sample_images'))
self.output_dir = os.getcwd() # OUTPUT_DIR
def init_binaries(self) -> None:
"""Init binary path variables:
PYTHON (for bash tests)