[PATCH stalld 08/52] tests: Introduce assert_stalld_rejects() helper

Tests that verify stalld rejects invalid arguments repeat the same
pattern of invoking stalld under a timeout, capturing the exit code,
and comparing it against zero and the timeout exit code. This block
appears twelve times across seven test files.

Introduce an assert_stalld_rejects() helper that encapsulates the
invocation, exit code check, and temporary log cleanup into a single
function call. The helper automatically includes the backend flag
set by init_functional_test() so that rejection tests run under the
correct backend when the test suite is invoked with an explicit
backend selection.

Signed-off-by: Wander Lairson Costa <[email protected]>
Assisted-by: Claude Code:claude-opus-4-6[1m] [PAL]
---
 tests/functional/test_affinity.sh             | 13 +-------
 tests/functional/test_boost_duration.sh       | 25 ++------------
 tests/functional/test_boost_period.sh         | 23 ++-----------
 tests/functional/test_boost_runtime.sh        | 33 ++-----------------
 tests/functional/test_cpu_selection.sh        | 14 +-------
 tests/functional/test_pidfile.sh              | 17 ++--------
 tests/functional/test_starvation_threshold.sh | 25 ++------------
 tests/helpers/test_helpers.sh                 | 21 +++++++++++-
 8 files changed, 33 insertions(+), 138 deletions(-)

diff --git a/tests/functional/test_affinity.sh b/tests/functional/test_affinity.sh
index ec6ff3b..12b83c9 100755
--- a/tests/functional/test_affinity.sh
+++ b/tests/functional/test_affinity.sh
@@ -200,18 +200,7 @@ fi
 #=============================================================================
 test_section "Test 7: Invalid CPU affinity (-a 999)"
 
-invalid_cpu=999
-INVALID_LOG="/tmp/stalld_test_affinity_invalid_$$.log"
-CLEANUP_FILES+=("${INVALID_LOG}")
-
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -l -t 5 -a ${invalid_cpu} > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Invalid CPU affinity rejected with error"
-else
-    fail "stalld did not reject invalid CPU affinity"
-fi
+assert_stalld_rejects "Invalid CPU affinity rejected with error" -f -v -l -t 5 -a 999
 
 #=============================================================================
 # Test 8: Verify affinity persists
diff --git a/tests/functional/test_boost_duration.sh b/tests/functional/test_boost_duration.sh
index b0319d2..e9a2135 100755
--- a/tests/functional/test_boost_duration.sh
+++ b/tests/functional/test_boost_duration.sh
@@ -106,32 +106,11 @@ cleanup_scenario "${STARVE_PID}"
 #=============================================================================
 test_section "Test 5: Invalid duration values"
 
-# Test with zero duration
 log "Testing with duration = 0"
-INVALID_LOG="/tmp/stalld_test_boost_duration_invalid_$$.log"
-CLEANUP_FILES+=("${INVALID_LOG}")
+assert_stalld_rejects "Zero duration rejected with error" -f -v -t ${threshold} -d 0
 
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -t ${threshold} -d 0 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Zero duration rejected with error"
-else
-    fail "stalld did not reject invalid duration value 0"
-fi
-
-# Test 6: Negative duration
 log "Testing with duration = -5"
-rm -f "${INVALID_LOG}"
-
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -t ${threshold} -d -5 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Negative duration rejected with error"
-else
-    fail "stalld did not reject invalid negative duration"
-fi
+assert_stalld_rejects "Negative duration rejected with error" -f -v -t ${threshold} -d -5
 
 log ""
 log "All boost duration tests completed"
diff --git a/tests/functional/test_boost_period.sh b/tests/functional/test_boost_period.sh
index b4f2339..bdbb03a 100755
--- a/tests/functional/test_boost_period.sh
+++ b/tests/functional/test_boost_period.sh
@@ -108,33 +108,14 @@ cleanup_scenario "${STARVE_PID}"
 #=============================================================================
 test_section "Test 5: Invalid period value (0)"
 
-INVALID_LOG="/tmp/stalld_test_boost_period_invalid_$$.log"
-CLEANUP_FILES+=("${INVALID_LOG}")
-
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -t $threshold -p 0 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Zero period rejected with error"
-else
-    fail "stalld did not reject invalid period value 0"
-fi
+assert_stalld_rejects "Zero period rejected with error" -f -v -t $threshold -p 0
 
 #=============================================================================
 # Test 6: Negative period
 #=============================================================================
 test_section "Test 6: Invalid period value (negative)"
 
-rm -f "${INVALID_LOG}"
-
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -t $threshold -p -1000000 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Negative period rejected with error"
-else
-    fail "stalld did not reject invalid negative period"
-fi
+assert_stalld_rejects "Negative period rejected with error" -f -v -t $threshold -p -1000000
 
 #=============================================================================
 # Final Summary
diff --git a/tests/functional/test_boost_runtime.sh b/tests/functional/test_boost_runtime.sh
index 7585e6b..dfecccc 100755
--- a/tests/functional/test_boost_runtime.sh
+++ b/tests/functional/test_boost_runtime.sh
@@ -107,52 +107,25 @@ test_section "Test 5: Runtime > period (invalid)"
 
 invalid_runtime=2000000000
 period=1000000000
-INVALID_LOG="/tmp/stalld_test_boost_runtime_invalid_$$.log"
-CLEANUP_FILES+=("${INVALID_LOG}")
 
 log "Testing with runtime ${invalid_runtime}ns > period ${period}ns"
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -t ${threshold} -r ${invalid_runtime} -p ${period} > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Runtime > period rejected with error"
-else
-    fail "stalld did not reject invalid runtime > period"
-fi
+assert_stalld_rejects "Runtime > period rejected with error" -f -v -t ${threshold} -r ${invalid_runtime} -p ${period}
 
 #=============================================================================
 # Test 6: Invalid runtime (0)
 #=============================================================================
 test_section "Test 6: Invalid runtime value (0)"
 
-rm -f "${INVALID_LOG}"
-
 log "Testing with runtime = 0"
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -t ${threshold} -r 0 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Zero runtime rejected with error"
-else
-    fail "stalld did not reject invalid runtime value 0"
-fi
+assert_stalld_rejects "Zero runtime rejected with error" -f -v -t ${threshold} -r 0
 
 #=============================================================================
 # Test 7: Negative runtime
 #=============================================================================
 test_section "Test 7: Invalid runtime value (negative)"
 
-rm -f "${INVALID_LOG}"
-
 log "Testing with runtime = -5000"
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -t ${threshold} -r -5000 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Negative runtime rejected with error"
-else
-    fail "stalld did not reject invalid negative runtime"
-fi
+assert_stalld_rejects "Negative runtime rejected with error" -f -v -t ${threshold} -r -5000
 
 log ""
 log "All boost runtime tests completed"
diff --git a/tests/functional/test_cpu_selection.sh b/tests/functional/test_cpu_selection.sh
index 3fa2128..32cbe79 100755
--- a/tests/functional/test_cpu_selection.sh
+++ b/tests/functional/test_cpu_selection.sh
@@ -135,19 +135,7 @@ fi
 test_section "Test 5: Invalid CPU number (-c 999)"
 invalid_cpu=999
 
-# Create temporary log file for this specific test
-INVALID_LOG="/tmp/stalld_invalid_cpu_$$.log"
-CLEANUP_FILES+=("${INVALID_LOG}")
-
-# Run stalld with invalid CPU and capture output
-timeout 5 "${TEST_ROOT}/../stalld" -f -v -c $invalid_cpu -l -t 5 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "stalld rejected invalid CPU number"
-else
-    fail "stalld did not reject invalid CPU"
-fi
+assert_stalld_rejects "stalld rejected invalid CPU number" -f -v -c $invalid_cpu -l -t 5
 
 # Test 6: Verify non-selected CPUs are NOT monitored
 if [ "$num_cpus" -ge 2 ]; then
diff --git a/tests/functional/test_pidfile.sh b/tests/functional/test_pidfile.sh
index f24c836..4509307 100755
--- a/tests/functional/test_pidfile.sh
+++ b/tests/functional/test_pidfile.sh
@@ -151,21 +151,8 @@ stop_stalld
 #=============================================================================
 test_section "Test 6: Invalid pidfile path (permission denied)"
 
-# Use a non-existent parent directory so fopen() fails even as root
-invalid_pidfile="/nonexistent_${$}/stalld.pid"
-
-INVALID_LOG="/tmp/stalld_test_pidfile_invalid_$$.log"
-CLEANUP_FILES+=("${INVALID_LOG}")
-
-log "Testing invalid pidfile path: ${invalid_pidfile}"
-timeout 5 ${TEST_ROOT}/../stalld -f -v ${BACKEND_FLAG} -l -t 5 --pidfile "${invalid_pidfile}" > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Invalid pidfile path rejected with error"
-else
-    fail "stalld did not reject invalid pidfile path"
-fi
+log "Testing invalid pidfile path"
+assert_stalld_rejects "Invalid pidfile path rejected with error" -f -v -l -t 5 --pidfile "/nonexistent_$$/stalld.pid"
 
 #=============================================================================
 # Test 7: Verify pidfile is readable by other processes
diff --git a/tests/functional/test_starvation_threshold.sh b/tests/functional/test_starvation_threshold.sh
index 88d4d4c..79fa17b 100755
--- a/tests/functional/test_starvation_threshold.sh
+++ b/tests/functional/test_starvation_threshold.sh
@@ -113,32 +113,11 @@ cleanup_scenario "${STARVE_PID}"
 #=============================================================================
 test_section "Test 4: Invalid threshold values"
 
-# Test with zero threshold
 log "Testing with threshold = 0"
-INVALID_LOG="/tmp/stalld_test_threshold_invalid_$$.log"
-CLEANUP_FILES+=("${INVALID_LOG}")
+assert_stalld_rejects "Zero threshold rejected with error" -f -v -t 0
 
-timeout 5 ${TEST_ROOT}/../stalld -f -v -t 0 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Zero threshold rejected with error"
-else
-    fail "stalld did not reject invalid threshold value 0"
-fi
-
-# Test with negative threshold
 log "Testing with threshold = -5"
-rm -f "${INVALID_LOG}"
-
-timeout 5 ${TEST_ROOT}/../stalld -f -v -t -5 > "${INVALID_LOG}" 2>&1
-ret=$?
-
-if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
-    pass "Negative threshold rejected with error"
-else
-    fail "stalld did not reject invalid negative threshold"
-fi
+assert_stalld_rejects "Negative threshold rejected with error" -f -v -t -5
 
 log ""
 log "All starvation threshold tests completed"
diff --git a/tests/helpers/test_helpers.sh b/tests/helpers/test_helpers.sh
index 389310b..742b15e 100755
--- a/tests/helpers/test_helpers.sh
+++ b/tests/helpers/test_helpers.sh
@@ -191,6 +191,25 @@ assert_boost_detected() {
 	fi
 }
 
+# Assert that stalld rejects invalid arguments and exits non-zero.
+# Usage: assert_stalld_rejects <message> [stalld_args...]
+assert_stalld_rejects() {
+	local message=$1
+	shift
+
+	local log="/tmp/stalld_reject_$$.log"
+	timeout 5 ${TEST_ROOT}/../stalld ${BACKEND_FLAG} "$@" > "${log}" 2>&1
+	local ret=$?
+	if [ $ret -ne 0 ] && [ $ret -ne 124 ]; then
+		pass "${message}"
+	else
+		fail "${message}"
+		log "stalld output:"
+		cat "${log}"
+	fi
+	rm -f "${log}"
+}
+
 # Record a test pass with a description message.
 #
 # Usage: pass "description"
@@ -1226,7 +1245,7 @@ start_starvation_gen() {
 }
 
 # Export functions for use in tests
-export -f start_test end_test test_section cleanup_scenario find_starved_child assert_starvation_detected assert_boost_detected
+export -f start_test end_test test_section cleanup_scenario find_starved_child assert_starvation_detected assert_boost_detected assert_stalld_rejects
 export -f pass fail assert_equals assert_contains assert_not_contains
 export -f assert_file_exists assert_file_not_exists
 export -f assert_process_running assert_process_not_running
-- 
2.54.0