t: cover kvs transaction stats

Problem: There is no coverage for the new KVS transaction stats.

Add coverage in t1001-kvs-internals.t.

t/t1001-kvs-internals.t

@@ -534,6 +534,41 @@ test_expect_success 'kvs: 1 pending requests at end of tests before module remov
 	test $pendingcount1 -eq 1
 '
 
+#
+# transaction module stats
+#
+
+test_expect_success 'kvs: module stats returns reasonable transaction stats' '
+	commitcount=$(flux module stats -p transactions.commit.count kvs) &&
+	test $commitcount -ne 0 &&
+	commitmin=$(flux module stats -p transactions.commit.min kvs) &&
+	result=$(echo "$commitmin > 0.0" | bc -l) &&
+        test $result -eq 1 &&
+	commitmax=$(flux module stats -p transactions.commit.max kvs) &&
+	result=$(echo "$commitmax >= $commitmin" | bc -l) &&
+        test $result -eq 1 &&
+	commitmean=$(flux module stats -p transactions.commit.mean kvs) &&
+	result=$(echo "$commitmean > 0.0" | bc -l) &&
+        test $result -eq 1 &&
+	commitstddev=$(flux module stats -p transactions.commit.stddev kvs) &&
+	result=$(echo "$commitstddev >= 0.0" | bc -l) &&
+        test $result -eq 1 &&
+	fencecount=$(flux module stats -p transactions.fence.count kvs) &&
+	test $fencecount -ne 0 &&
+	fencemin=$(flux module stats -p transactions.fence.min kvs) &&
+	result=$(echo "$fencemin > 0.0" | bc -l) &&
+        test $result -eq 1 &&
+	fencemax=$(flux module stats -p transactions.fence.max kvs) &&
+	result=$(echo "$fencemax >= $fencemin" | bc -l) &&
+        test $result -eq 1 &&
+	fencemean=$(flux module stats -p transactions.fence.mean kvs) &&
+	result=$(echo "$fencemean > 0.0" | bc -l) &&
+        test $result -eq 1 &&
+	fencestddev=$(flux module stats -p transactions.fence.stddev kvs) &&
+	result=$(echo "$fencestddev >= 0.0" | bc -l) &&
+        test $result -eq 1
+'
+
 #
 # test ENOSYS on unfinished requests when unloading the KVS module
 #