- Linux-kselftest-mirror - lists.linaro.org

[PATCH v2 0/3] kunit: allow running test suites/cases individually

by Daniel Latypov

Allow running each suite or each test case alone per kernel boot. The motivation for this is to debug "test hermeticity" issues. This new --run_isolated flag would be a good first step to try and narrow down root causes. Context: sometimes tests pass/fail depending on what ran before them. Memory corruption errors in particular might only cause noticeable issues later on. But you can also have the opposite, where "fixing" one test causes another to start failing. Usage: $ ./tools/testing/kunit/kunit.py run --kunitconfig=lib/kunit --run_isolated=suite $ ./tools/testing/kunit/kunit.py run --kunitconfig=lib/kunit --run_isolated=test $ ./tools/testing/kunit/kunit.py run --kunitconfig=lib/kunit --run_isolated=test example The last one would provide output like ======== [PASSED] example ======== [PASSED] example_simple_test ============================================================ Testing complete. 1 tests run. 0 failed. 0 crashed. 0 skipped. Starting KUnit Kernel (2/3)... ============================================================ ======== [SKIPPED] example ======== [SKIPPED] example_skip_test # SKIP this test should be skipped ============================================================ Testing complete. 1 tests run. 0 failed. 0 crashed. 1 skipped. Starting KUnit Kernel (3/3)... ============================================================ ======== [SKIPPED] example ======== [SKIPPED] example_mark_skipped_test # SKIP this test should be skipped ============================================================ Testing complete. 1 tests run. 0 failed. 0 crashed. 1 skipped. See the last patch's description for a bit more detail. Meta: The first patch is from another series with just a reworded commit message, https://lore.kernel.org/linux-kselftest/20210805235145.2528054-2-dlatypov@g… This patch series is based on Shuah's kunit branch: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git/?… Changes: v1 -> v2: rebase onto Shuah's kunit branch, fix missing code in patch 1. Daniel Latypov (3): kunit: add 'kunit.action' param to allow listing out tests kunit: tool: factor exec + parse steps into a function kunit: tool: support running each suite/test separately lib/kunit/executor.c | 45 ++++++++- tools/testing/kunit/kunit.py | 127 +++++++++++++++++-------- tools/testing/kunit/kunit_tool_test.py | 40 ++++++++ 3 files changed, 167 insertions(+), 45 deletions(-) base-commit: 3b29021ddd10cfb6b2565c623595bd3b02036f33 -- 2.33.0.685.g46640cef36-goog

3 years, 4 months

2
8
0 0

[PATCH 1/1] selftests: KVM: set affinity of VM to right CPUs

by Dongli Zhang

The nr_cpus = CPU_COUNT(&possible_mask) is the number of available CPUs in possible_mask. As a result, the "cpu = i % nr_cpus" may always return CPU that is not available in possible_mask. Suppose the server has 8 CPUs. The below Failure is encountered immediately if the task is bound to CPU 5 and 6. ==== Test Assertion Failure ==== rseq_test.c:228: i > (NR_TASK_MIGRATIONS / 2) pid=10127 tid=10127 errno=4 - Interrupted system call 1 0x00000000004018e5: main at rseq_test.c:227 2 0x00007fcc8fc66bf6: ?? ??:0 3 0x0000000000401959: _start at ??:? Only performed 4 KVM_RUNs, task stalled too much? Signed-off-by: Dongli Zhang <dongli.zhang(a)oracle.com> --- tools/testing/selftests/kvm/rseq_test.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c index c5e0dd664a7b..41df5173970c 100644 --- a/tools/testing/selftests/kvm/rseq_test.c +++ b/tools/testing/selftests/kvm/rseq_test.c @@ -10,6 +10,7 @@ #include <signal.h> #include <syscall.h> #include <sys/ioctl.h> +#include <sys/sysinfo.h> #include <asm/barrier.h> #include <linux/atomic.h> #include <linux/rseq.h> @@ -43,6 +44,18 @@ static bool done; static atomic_t seq_cnt; +static int get_max_cpu_idx(void) +{ + int nproc = get_nprocs_conf(); + int i, max = -ENOENT; + + for (i = 0; i < nproc; i++) + if (CPU_ISSET(i, &possible_mask)) + max = i; + + return max; +} + static void guest_code(void) { for (;;) @@ -61,10 +74,13 @@ static void *migration_worker(void *ign) { cpu_set_t allowed_mask; int r, i, nr_cpus, cpu; + int max_cpu_idx; CPU_ZERO(&allowed_mask); - nr_cpus = CPU_COUNT(&possible_mask); + max_cpu_idx = get_max_cpu_idx(); + TEST_ASSERT(max_cpu_idx >= 0, "Invalid possible_mask"); + nr_cpus = max_cpu_idx + 1; for (i = 0; i < NR_TASK_MIGRATIONS; i++) { cpu = i % nr_cpus; -- 2.17.1

3 years, 4 months

2
4
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[PATCH v2 0/4] selftests: arm64: vec-syscfg updates

by Mark Brown

This series fixes up a few issues introduced into vec-syscfg during refactoring in the review process, then adds a new test which ensures that the behaviour when we attempt to set a vector length which is not supported by the current system matches what is documented in the SVE ABI documentation. v2: - Fix handling of missing VLs when checking that vector length setting works as expected. Mark Brown (4): selftests: arm64: Fix printf() format mismatch in vec-syscfg selftests: arm64: Remove bogus error check on writing to files selftests: arm64: Fix and enable test for setting current VL in vec-syscfg selftests: arm64: Verify that all possible vector lengths are handled tools/testing/selftests/arm64/fp/vec-syscfg.c | 89 ++++++++++++++++--- 1 file changed, 76 insertions(+), 13 deletions(-) base-commit: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f -- 2.20.1

3 years, 4 months

4
12
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[PATCH v3 0/4] selftests: arm64: vec-syscfg updates

by Mark Brown

This series fixes up a few issues introduced into vec-syscfg during refactoring in the review process, then adds a new test which ensures that the behaviour when we attempt to set a vector length which is not supported by the current system matches what is documented in the SVE ABI documentation. v3: - Rebased onto v5.14-rc3. - Check to see if we discovered the system vector lengths before trying to set all possible vector lengths since we need that information to validate the results. v2: - Fix handling of missing VLs when checking that vector length setting works as expected. Mark Brown (4): selftests: arm64: Fix printf() format mismatch in vec-syscfg selftests: arm64: Remove bogus error check on writing to files selftests: arm64: Fix and enable test for setting current VL in vec-syscfg selftests: arm64: Verify that all possible vector lengths are handled tools/testing/selftests/arm64/fp/vec-syscfg.c | 95 ++++++++++++++++--- 1 file changed, 82 insertions(+), 13 deletions(-) base-commit: 5816b3e6577eaa676ceb00a848f0fd65fe2adc29 -- 2.20.1

3 years, 4 months

2
5
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[PATCH v1 0/8] selftests: arm64: SVE ptrace test rework

by Mark Brown

This series overhauls the selftests we have for the SVE ptrace interface to make them much more comprehensive than they are currently, making the coverage of the data read and written more complete. The new coverage for setting data on all vector lengths showed the issue with using the wrong buffer size with ptrace reported and fixed by: https://lore.kernel.org/linux-arm-kernel/20210909165356.10675-1-broonie@ker… (arm64/sve: Use correct size when reinitialising SVE state). Mark Brown (8): selftests: arm64: Use a define for the number of SVE ptrace tests to be run selftests: arm64: Don't log child creation as a test in SVE ptrace test selftests: arm64: Remove extraneous register setting code selftests: arm64: Document what the SVE ptrace test is doing selftests: arm64: Clarify output when verifying SVE register set selftests: arm64: Verify interoperation of SVE and FPSIMD register sets selftests: arm64: More comprehensively test the SVE ptrace interface selftests: arm64: Move FPSIMD in SVE ptrace test into a function tools/testing/selftests/arm64/fp/Makefile | 2 +- tools/testing/selftests/arm64/fp/TODO | 9 +- .../selftests/arm64/fp/sve-ptrace-asm.S | 33 -- tools/testing/selftests/arm64/fp/sve-ptrace.c | 460 ++++++++++++------ 4 files changed, 321 insertions(+), 183 deletions(-) delete mode 100644 tools/testing/selftests/arm64/fp/sve-ptrace-asm.S base-commit: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f -- 2.20.1

3 years, 4 months

2
9
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[PATCH v8 0/2] Interface to represent PAPR firmware attributes

by Pratik R. Sampat

RFC: https://lkml.org/lkml/2021/6/4/791 PATCH v1: https://lkml.org/lkml/2021/6/16/805 PATCH v2: https://lkml.org/lkml/2021/7/6/138 PATCH v3: https://lkml.org/lkml/2021/7/12/2799 PATCH v4: https://lkml.org/lkml/2021/7/16/532 PATCH v5: https://lkml.org/lkml/2021/7/19/247 PATCH v6: https://lkml.org/lkml/2021/7/20/36 PATCH v7: https://lkml.org/lkml/2021/7/23/26 Changelog v7-->v8 1. Rebased and tested against 5.15 2. Added a selftest to check if the energy and frequency attribues exist and their files populated Also, have implemented a POC using this interface for the powerpc-utils' ppc64_cpu --frequency command-line tool to utilize this information in userspace. The POC for the new interface has been sent to the powerpc-utils mailing list for early review: https://groups.google.com/g/powerpc-utils-devel/c/r4i7JnlyQ8s Sample output from the powerpc-utils tool is as follows: # ppc64_cpu --frequency Power and Performance Mode: XXXX Idle Power Saver Status : XXXX Processor Folding Status : XXXX --> Printed if Idle power save status is supported Platform reported frequencies --> Frequencies reported from the platform's H_CALL i.e PAPR interface min : NNNN GHz max : NNNN GHz static : NNNN GHz Tool Computed frequencies min : NNNN GHz (cpu XX) max : NNNN GHz (cpu XX) avg : NNNN GHz Pratik R. Sampat (2): powerpc/pseries: Interface to represent PAPR firmware attributes selftest/powerpc: Add PAPR sysfs attributes sniff test .../sysfs-firmware-papr-energy-scale-info | 26 ++ arch/powerpc/include/asm/hvcall.h | 24 +- arch/powerpc/kvm/trace_hv.h | 1 + arch/powerpc/platforms/pseries/Makefile | 3 +- .../pseries/papr_platform_attributes.c | 312 ++++++++++++++++++ tools/testing/selftests/powerpc/Makefile | 1 + .../powerpc/papr_attributes/.gitignore | 2 + .../powerpc/papr_attributes/Makefile | 7 + .../powerpc/papr_attributes/attr_test.c | 107 ++++++ 9 files changed, 481 insertions(+), 2 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-firmware-papr-energy-scale-info create mode 100644 arch/powerpc/platforms/pseries/papr_platform_attributes.c create mode 100644 tools/testing/selftests/powerpc/papr_attributes/.gitignore create mode 100644 tools/testing/selftests/powerpc/papr_attributes/Makefile create mode 100644 tools/testing/selftests/powerpc/papr_attributes/attr_test.c -- 2.31.1

3 years, 4 months

4
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[PATCH] selftests/ptp: Use kselftest skip code for skipped tests

by Po-Hsu Lin

The phc.sh script in the ptp directory is still using exit 0 when the test has been skipped due to some unmet requirements. Use kselftest framework skip code instead so it can help us to distinguish the return status. Criterion to filter out what should be fixed in ptp directory: grep -r "exit 0" -B1 | grep -i skip This change might cause some false-positives if people are running these test scripts directly and only checking their return codes, which will change from 0 to 4. However I think the impact should be small as most of our scripts here are already using this skip code. And there will be no such issue if running them with the kselftest framework. Note that there are some SKIP messages exit with 1, I leave those unchanged. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> --- tools/testing/selftests/ptp/phc.sh | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/ptp/phc.sh b/tools/testing/selftests/ptp/phc.sh index ac6e5a6..0820544 100755 --- a/tools/testing/selftests/ptp/phc.sh +++ b/tools/testing/selftests/ptp/phc.sh @@ -1,6 +1,9 @@ #!/bin/bash # SPDX-License-Identifier: GPL-2.0 +# Kselftest framework requirement - SKIP code is 4. +readonly KSFT_SKIP=4 + ALL_TESTS=" settime adjtime @@ -13,12 +16,12 @@ DEV=$1 if [[ "$(id -u)" -ne 0 ]]; then echo "SKIP: need root privileges" - exit 0 + exit $KSFT_SKIP fi if [[ "$DEV" == "" ]]; then echo "SKIP: PTP device not provided" - exit 0 + exit $KSFT_SKIP fi require_command() -- 2.7.4

3 years, 4 months

1
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0 0

[PATCH] selftests/bpf: Use kselftest skip code for skipped tests

by Po-Hsu Lin

There are several test cases in the bpf directory are still using exit 0 when they need to be skipped. Use kselftest framework skip code instead so it can help us to distinguish the return status. Criterion to filter out what should be fixed in bpf directory: grep -r "exit 0" -B1 | grep -i skip This change might cause some false-positives if people are running these test scripts directly and only checking their return codes, which will change from 0 to 4. However I think the impact should be small as most of our scripts here are already using this skip code. And there will be no such issue if running them with the kselftest framework. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> --- tools/testing/selftests/bpf/test_bpftool_build.sh | 5 ++++- tools/testing/selftests/bpf/test_xdp_meta.sh | 5 ++++- tools/testing/selftests/bpf/test_xdp_vlan.sh | 7 +++++-- 3 files changed, 13 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/test_bpftool_build.sh b/tools/testing/selftests/bpf/test_bpftool_build.sh index ac349a5..b6fab1e 100755 --- a/tools/testing/selftests/bpf/test_bpftool_build.sh +++ b/tools/testing/selftests/bpf/test_bpftool_build.sh @@ -1,6 +1,9 @@ #!/bin/bash # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + case $1 in -h|--help) echo -e "$0 [-j <n>]" @@ -22,7 +25,7 @@ KDIR_ROOT_DIR=$(realpath $PWD/$SCRIPT_REL_DIR/../../../../) cd $KDIR_ROOT_DIR if [ ! -e tools/bpf/bpftool/Makefile ]; then echo -e "skip: bpftool files not found!\n" - exit 0 + exit $ksft_skip fi ERROR=0 diff --git a/tools/testing/selftests/bpf/test_xdp_meta.sh b/tools/testing/selftests/bpf/test_xdp_meta.sh index 637fcf4..fd3f218 100755 --- a/tools/testing/selftests/bpf/test_xdp_meta.sh +++ b/tools/testing/selftests/bpf/test_xdp_meta.sh @@ -1,5 +1,8 @@ #!/bin/sh +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + cleanup() { if [ "$?" = "0" ]; then @@ -17,7 +20,7 @@ cleanup() ip link set dev lo xdp off 2>/dev/null > /dev/null if [ $? -ne 0 ];then echo "selftests: [SKIP] Could not run test without the ip xdp support" - exit 0 + exit $ksft_skip fi set -e diff --git a/tools/testing/selftests/bpf/test_xdp_vlan.sh b/tools/testing/selftests/bpf/test_xdp_vlan.sh index bb8b0da..1aa7404 100755 --- a/tools/testing/selftests/bpf/test_xdp_vlan.sh +++ b/tools/testing/selftests/bpf/test_xdp_vlan.sh @@ -2,6 +2,9 @@ # SPDX-License-Identifier: GPL-2.0 # Author: Jesper Dangaard Brouer <hawk(a)kernel.org> +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + # Allow wrapper scripts to name test if [ -z "$TESTNAME" ]; then TESTNAME=xdp_vlan @@ -94,7 +97,7 @@ while true; do -h | --help ) usage; echo "selftests: $TESTNAME [SKIP] usage help info requested" - exit 0 + exit $ksft_skip ;; * ) shift @@ -117,7 +120,7 @@ fi ip link set dev lo xdpgeneric off 2>/dev/null > /dev/null if [ $? -ne 0 ]; then echo "selftests: $TESTNAME [SKIP] need ip xdp support" - exit 0 + exit $ksft_skip fi # Interactive mode likely require us to cleanup netns -- 2.7.4

3 years, 4 months

3
3
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[PATCHv2] selftests/bpf: Use kselftest skip code for skipped tests

by Po-Hsu Lin

There are several test cases in the bpf directory are still using exit 0 when they need to be skipped. Use kselftest framework skip code instead so it can help us to distinguish the return status. Criterion to filter out what should be fixed in bpf directory: grep -r "exit 0" -B1 | grep -i skip This change might cause some false-positives if people are running these test scripts directly and only checking their return codes, which will change from 0 to 4. However I think the impact should be small as most of our scripts here are already using this skip code. And there will be no such issue if running them with the kselftest framework. v1 -> v2: - Ignore bpf/test_bpftool_build.sh as similar changes has been made. - Make KSFT_SKIP readonly as suggested by Jakub Sitnicki. Signed-off-by: Po-Hsu Lin <po-hsu.lin(a)canonical.com> --- tools/testing/selftests/bpf/test_xdp_meta.sh | 5 ++++- tools/testing/selftests/bpf/test_xdp_vlan.sh | 7 +++++-- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/bpf/test_xdp_meta.sh b/tools/testing/selftests/bpf/test_xdp_meta.sh index 637fcf4..d10cefd 100755 --- a/tools/testing/selftests/bpf/test_xdp_meta.sh +++ b/tools/testing/selftests/bpf/test_xdp_meta.sh @@ -1,5 +1,8 @@ #!/bin/sh +# Kselftest framework requirement - SKIP code is 4. +readonly KSFT_SKIP=4 + cleanup() { if [ "$?" = "0" ]; then @@ -17,7 +20,7 @@ cleanup() ip link set dev lo xdp off 2>/dev/null > /dev/null if [ $? -ne 0 ];then echo "selftests: [SKIP] Could not run test without the ip xdp support" - exit 0 + exit $KSFT_SKIP fi set -e diff --git a/tools/testing/selftests/bpf/test_xdp_vlan.sh b/tools/testing/selftests/bpf/test_xdp_vlan.sh index bb8b0da..0cbc760 100755 --- a/tools/testing/selftests/bpf/test_xdp_vlan.sh +++ b/tools/testing/selftests/bpf/test_xdp_vlan.sh @@ -2,6 +2,9 @@ # SPDX-License-Identifier: GPL-2.0 # Author: Jesper Dangaard Brouer <hawk(a)kernel.org> +# Kselftest framework requirement - SKIP code is 4. +readonly KSFT_SKIP=4 + # Allow wrapper scripts to name test if [ -z "$TESTNAME" ]; then TESTNAME=xdp_vlan @@ -94,7 +97,7 @@ while true; do -h | --help ) usage; echo "selftests: $TESTNAME [SKIP] usage help info requested" - exit 0 + exit $KSFT_SKIP ;; * ) shift @@ -117,7 +120,7 @@ fi ip link set dev lo xdpgeneric off 2>/dev/null > /dev/null if [ $? -ne 0 ]; then echo "selftests: $TESTNAME [SKIP] need ip xdp support" - exit 0 + exit $KSFT_SKIP fi # Interactive mode likely require us to cleanup netns -- 2.7.4

3 years, 4 months

1
0
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[PATCH v2] kunit: tool: better handling of quasi-bool args (--json, --raw_output)

by Daniel Latypov

Problem: What does this do? $ kunit.py run --json Well, it runs all the tests and prints test results out as JSON. And next is $ kunit.py run my-test-suite --json This runs just `my-test-suite` and prints results out as JSON. But what about? $ kunit.py run --json my-test-suite This runs all the tests and stores the json results in a "my-test-suite" file. Why: --json, and now --raw_output are actually string flags. They just have a default value. --json in particular takes the name of an output file. It was intended that you'd do $ kunit.py run --json=my_output_file my-test-suite if you ever wanted to specify the value. Workaround: It doesn't seem like there's a way to make https://docs.python.org/3/library/argparse.html only accept arg values after a '='. I believe that `--json` should "just work" regardless of where it is. So this patch automatically rewrites a bare `--json` to `--json=stdout`. That makes the examples above work the same way. Add a regression test that can catch this for --raw_output. Fixes: 6a499c9c42d0 ("kunit: tool: make --raw_output support only showing kunit output") Signed-off-by: Daniel Latypov <dlatypov(a)google.com> Tested-by: David Gow <davidgow(a)google.com> --- v1 -> v2: fix mypy error by converting mapped argv to a list. --- tools/testing/kunit/kunit.py | 24 ++++++++++++++++++++++-- tools/testing/kunit/kunit_tool_test.py | 8 ++++++++ 2 files changed, 30 insertions(+), 2 deletions(-) diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py index 5a931456e718..ac35c61f65f5 100755 --- a/tools/testing/kunit/kunit.py +++ b/tools/testing/kunit/kunit.py @@ -16,7 +16,7 @@ assert sys.version_info >= (3, 7), "Python version is too old" from collections import namedtuple from enum import Enum, auto -from typing import Iterable +from typing import Iterable, Sequence import kunit_config import kunit_json @@ -186,6 +186,26 @@ def run_tests(linux: kunit_kernel.LinuxSourceTree, exec_result.elapsed_time)) return parse_result +# Problem: +# $ kunit.py run --json +# works as one would expect and prints the parsed test results as JSON. +# $ kunit.py run --json suite_name +# would *not* pass suite_name as the filter_glob and print as json. +# argparse will consider it to be another way of writing +# $ kunit.py run --json=suite_name +# i.e. it would run all tests, and dump the json to a `suite_name` file. +# So we hackily automatically rewrite --json => --json=stdout +pseudo_bool_flag_defaults = { + '--json': 'stdout', + '--raw_output': 'kunit', +} +def massage_argv(argv: Sequence[str]) -> Sequence[str]: + def massage_arg(arg: str) -> str: + if arg not in pseudo_bool_flag_defaults: + return arg + return f'{arg}={pseudo_bool_flag_defaults[arg]}' + return list(map(massage_arg, argv)) + def add_common_opts(parser) -> None: parser.add_argument('--build_dir', help='As in the make command, it specifies the build ' @@ -303,7 +323,7 @@ def main(argv, linux=None): help='Specifies the file to read results from.', type=str, nargs='?', metavar='input_file') - cli_args = parser.parse_args(argv) + cli_args = parser.parse_args(massage_argv(argv)) if get_kernel_root_path(): os.chdir(get_kernel_root_path()) diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py index 619c4554cbff..1edcc8373b4e 100755 --- a/tools/testing/kunit/kunit_tool_test.py +++ b/tools/testing/kunit/kunit_tool_test.py @@ -408,6 +408,14 @@ class KUnitMainTest(unittest.TestCase): self.assertNotEqual(call, mock.call(StrContains('Testing complete.'))) self.assertNotEqual(call, mock.call(StrContains(' 0 tests run'))) + def test_run_raw_output_does_not_take_positional_args(self): + # --raw_output is a string flag, but we don't want it to consume + # any positional arguments, only ones after an '=' + self.linux_source_mock.run_kernel = mock.Mock(return_value=[]) + kunit.main(['run', '--raw_output', 'filter_glob'], self.linux_source_mock) + self.linux_source_mock.run_kernel.assert_called_once_with( + args=None, build_dir='.kunit', filter_glob='filter_glob', timeout=300) + def test_exec_timeout(self): timeout = 3453 kunit.main(['exec', '--timeout', str(timeout)], self.linux_source_mock) base-commit: 4c17ca27923c16fd73bbb9ad033c7d749c3bcfcc -- 2.33.0.464.g1972c5931b-goog

3 years, 4 months

2
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