t: cover kvs initial-rootref option

Problem: There are no tests for the new kvs initial-rootref option.

Add coverage in a new t1013-kvs-initial-rootref.t test.

Author: chu11

t/Makefile.am

@@ -108,6 +108,7 @@ TESTSCRIPTS = \
 	t1010-kvs-commit-sync.t \
 	t1011-kvs-checkpoint-period.t \
 	t1012-kvs-checkpoint.t \
+	t1013-kvs-initial-rootref.t \
 	t1101-barrier-basic.t \
 	t1102-cmddriver.t \
 	t1103-apidisconnect.t \

t/t1013-kvs-initial-rootref.t

@@ -0,0 +1,74 @@
+#!/bin/sh
+#
+
+test_description='Test kvs module initial-rootref option'
+
+. `dirname $0`/kvs/kvs-helper.sh
+
+. `dirname $0`/sharness.sh
+
+RPC=${FLUX_BUILD_DIR}/t/request/rpc
+
+export FLUX_CONF_DIR=$(pwd)
+SIZE=4
+test_under_flux ${SIZE} minimal -Sstatedir=$(pwd)
+
+test_expect_success 'load content, content-sqlite, and kvs' '
+	flux module load content &&
+	flux module load content-sqlite &&
+	flux module load kvs
+'
+
+test_expect_success 'kvs: put some data to kvs' '
+	flux kvs put --blobref data=1 > blob1.out &&
+	flux kvs put --blobref data=2 > blob2.out &&
+	flux kvs put --blobref data=3 > blob3.out &&
+	flux kvs put --blobref data=4 > blob4.out &&
+	flux kvs put --blobref data=5 > blob5.out
+'
+
+test_expect_success 'kvs: reload kvs' '
+	flux module reload kvs
+'
+
+test_expect_success 'kvs: data should be last written' '
+	echo "5" > data1.exp &&
+	flux kvs get data > data1.out &&
+	test_cmp data1.out data1.exp
+'
+
+test_expect_success 'kvs: root should be last one' '
+	flux kvs getroot -b > getroot1.out &&
+	test_cmp getroot1.out blob5.out
+'
+
+test_expect_success 'kvs: reload kvs with different initial rootref' '
+        ref=$(cat blob3.out) &&
+	flux module reload kvs initial-rootref="$ref"
+'
+
+test_expect_success 'kvs: data should be previous one' '
+	echo "3" > data2.exp &&
+	flux kvs get data > data2.out &&
+	test_cmp data2.out data2.exp
+'
+
+test_expect_success 'kvs: root should be previous one' '
+	flux kvs getroot -b > getroot2.out &&
+	test_cmp getroot2.out blob3.out
+'
+
+test_expect_success 'kvs: remove kvs module' '
+	flux module remove kvs
+'
+
+test_expect_success 'kvs: load kvs with bad rootref' '
+	test_must_fail flux module reload kvs initial-rootref="abcdefghijklmnop"
+'
+
+test_expect_success 'kvs: remove modules' '
+	flux module remove content-sqlite &&
+	flux module remove content
+'
+
+test_done