t: add tests for running jobs under instance owner

Problem: There exists no tests in flux-accounting for submitting jobs
as the instance owner with the priority plugin loaded.

Add some tests.

t/Makefile.am

@@ -38,6 +38,7 @@ TESTSCRIPTS = \
 	t1036-hierarchy-small-no-tie-db.t \
 	t1037-hierarchy-small-tie-db.t \
 	t1038-hierarchy-small-tie-all-db.t \
+	t1039-issue476.t \
 	t5000-valgrind.t \
 	python/t1000-example.py \
 	python/t1001_db.py \

t/t1039-issue476.t

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+test_description='test submitting jobs as instance owner'
+
+. `dirname $0`/sharness.sh
+
+mkdir -p conf.d
+
+MULTI_FACTOR_PRIORITY=${FLUX_BUILD_DIR}/src/plugins/.libs/mf_priority.so
+SUBMIT_AS=${SHARNESS_TEST_SRCDIR}/scripts/submit_as.py
+ACCOUNTING_DB=$(pwd)/FluxAccountingTest.db
+
+export TEST_UNDER_FLUX_SCHED_SIMPLE_MODE="limited=1"
+test_under_flux 1 job -o,--config-path=$(pwd)/conf.d
+
+flux setattr log-stderr-level 1
+
+test_expect_success 'allow guest access to testexec' '
+	flux config load <<-EOF
+	[exec.testexec]
+	allow-guests = true
+	EOF
+'
+test_expect_success 'create flux-accounting DB, start flux-accounting service' '
+	flux account -p ${ACCOUNTING_DB} create-db &&
+	flux account-service -p ${ACCOUNTING_DB} -t
+'
+
+test_expect_success 'load multi-factor priority plugin' '
+	flux jobtap load -r .priority-default ${MULTI_FACTOR_PRIORITY} &&
+	flux jobtap list | grep mf_priority
+'
+
+test_expect_success 'send flux-accounting information to plugin' '
+	flux account-priority-update -p ${ACCOUNTING_DB}
+'
+
+test_expect_success 'submit a job as instance owner' '
+	username=$(whoami) &&
+	uid=$(id -u) &&
+	job=$(flux python ${SUBMIT_AS} ${uid} hostname) &&
+	flux job wait-event -vt 5 ${job} alloc &&
+	flux cancel ${job}
+'
+
+test_expect_success 'shut down flux-accounting service' '
+	flux python -c "import flux; flux.Flux().rpc(\"accounting.shutdown_service\").get()"
+'
+
+test_expect_success 'remove flux-accounting DB' '
+	rm ${ACCOUNTING_DB}
+'
+
+test_done