testsuite: add flux-jobs per-resource=core tests

Problem: There is no coverage for flux-jobs ntasks output for the
special cases when per-resource.type is set to "core".

Add tests to t2260-job-list.t.

Author: chu11

t/t2260-job-list.t

@@ -711,7 +711,10 @@ test_expect_success HAVE_JQ 'flux job list outputs ntasks correctly (tasks-per-n
         echo $obj | jq -e ".ntasks == 6"
 '
 
-test_expect_success 'flux jobs list outputs ntasks correctly (per-resource.type=node)' '
+# N.B. As of this test writing, tasks-per-node uses
+# per-resource.type=node.  But write more direct test in case of
+# future changes.
+test_expect_success HAVE_JQ 'flux job list outputs ntasks correctly (per-resource.type=node)' '
         nnodes=$(flux resource list -s up -no {nnodes}) &&
         ncores=$(flux resource list -s up -no {ncores}) &&
         extra=$((ncores / nnodes + 2)) &&
@@ -727,6 +730,54 @@ test_expect_success 'flux jobs list outputs ntasks correctly (per-resource.type=
         echo $obj | jq -e ".ntasks == ${expected}"
 '
 
+test_expect_success HAVE_JQ 'flux job list outputs ntasks correctly (cores / tasks-per-core)' '
+        jobid=`flux mini submit --wait --cores=4 --tasks-per-core=2 hostname | flux job id` &&
+        echo $jobid > taskcount7.id &&
+        wait_jobid_state $jobid inactive &&
+        obj=$(flux job list -s inactive | grep $jobid) &&
+        echo $obj | jq -e ".ntasks == 8"
+'
+
+test_expect_success HAVE_JQ 'flux job list outputs ntasks correctly (tasks / cores-per-task)' '
+	jobid=$(flux mini submit --wait -n2 --cores-per-task=2 \
+	        -o per-resource.type=core \
+	        -o per-resource.count=2 \
+	        hostname | flux job id) &&
+        echo $jobid > taskcount8.id &&
+        wait_jobid_state $jobid inactive &&
+        obj=$(flux job list -s inactive | grep $jobid) &&
+        echo $obj | jq -e ".ntasks == 8"
+'
+
+test_expect_success HAVE_JQ 'flux job list outputs ntasks correctly (nodes / tasks-per-core 2)' '
+        nnodes=$(flux resource list -s up -no {nnodes}) &&
+        ncores=$(flux resource list -s up -no {ncores}) &&
+        jobid=`flux mini submit --wait -N ${nnodes} --tasks-per-core=2 hostname | flux job id` &&
+        echo $jobid > taskcount9.id &&
+        wait_jobid_state $jobid inactive &&
+        expected=$((ncores * 2)) &&
+        echo ${expected} > per_resource_type_core_ntasks1.exp &&
+        obj=$(flux job list -s inactive | grep $jobid) &&
+        echo $obj | jq -e ".ntasks == ${expected}"
+'
+
+# N.B. As of this test writing, tasks-per-core uses
+# per-resource.type=core.  But write direct test in case of future
+# changes.
+test_expect_success HAVE_JQ 'flux job list outputs ntasks correctly (cores / per-resource.type=core)' '
+	ncores=$(flux resource list -s up -no {ncores}) &&
+	jobid=$(flux mini submit --wait --cores=${ncores} \
+	        -o per-resource.type=core \
+	        -o per-resource.count=2 \
+	        hostname | flux job id) &&
+        echo $jobid > taskcount10.id &&
+        wait_jobid_state $jobid inactive &&
+        obj=$(flux job list -s inactive | grep $jobid) &&
+        expected=$((ncores * 2)) &&
+        echo ${expected} > per_resource_type_core_ntasks2.exp &&
+        echo $obj | jq -e ".ntasks == ${expected}"
+'
+
 test_expect_success 'reload the job-list module' '
         flux module reload job-list
 '
@@ -738,6 +789,10 @@ test_expect_success HAVE_JQ 'verify task count preserved across restart' '
         jobid4=`cat taskcount4.id` &&
         jobid5=`cat taskcount5.id` &&
         jobid6=`cat taskcount6.id` &&
+        jobid7=`cat taskcount7.id` &&
+        jobid8=`cat taskcount8.id` &&
+        jobid9=`cat taskcount9.id` &&
+        jobid10=`cat taskcount10.id` &&
         obj=$(flux job list -s inactive | grep ${jobid1}) &&
         echo $obj | jq -e ".ntasks == 1" &&
         obj=$(flux job list -s inactive | grep ${jobid2}) &&
@@ -750,6 +805,16 @@ test_expect_success HAVE_JQ 'verify task count preserved across restart' '
         echo $obj | jq -e ".ntasks == 6" &&
         obj=$(flux job list -s inactive | grep ${jobid6}) &&
         expected=$(cat per_resource_type_node_ntasks.exp) &&
+        echo $obj | jq -e ".ntasks == ${expected}" &&
+        obj=$(flux job list -s inactive | grep ${jobid7}) &&
+        echo $obj | jq -e ".ntasks == 8" &&
+        obj=$(flux job list -s inactive | grep ${jobid8}) &&
+        echo $obj | jq -e ".ntasks == 8" &&
+        obj=$(flux job list -s inactive | grep ${jobid9}) &&
+        expected=$(cat per_resource_type_core_ntasks1.exp) &&
+        echo $obj | jq -e ".ntasks == ${expected}" &&
+        obj=$(flux job list -s inactive | grep ${jobid10}) &&
+        expected=$(cat per_resource_type_core_ntasks2.exp) &&
         echo $obj | jq -e ".ntasks == ${expected}"
 '