tests: add test cases for showing nonexistent section and option.

Also fix the false error message about absence of uci-static.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

test/tests.d/050_show

@@ -8,6 +8,9 @@ test_get_parsing()
 	assertFailWithNoReturn "${UCI_Q} show test.section.opt.val."
 	assertFailWithNoReturn "${UCI_Q} show test.section.opt.val.qsdf.qsd"
 	assertFailWithNoReturn "${UCI_Q} show test.section.opt.valqsqsd"
+	assertFailWithNoReturn "${UCI_Q} show test.nilsection"
+	assertFailWithNoReturn "${UCI_Q} show test.nilsection.nilopt"
+	assertFailWithNoReturn "${UCI_Q} show test.section.nilopt"
 }
 
 prepare_get_parsing_multiline() {

test/tests.sh

@@ -8,7 +8,7 @@ FULL_SUITE=${TESTS_DIR}"/full_suite.sh"
 
 UCI_BIN="../uci"
 [ -x $UCI_BIN ] || {
-	echo "uci-static is not present."
+	echo "uci is not present." >&2
 	return 1
 }
 UCI="${UCI_BIN} -c ${CONFIG_DIR} -p ${CHANGES_DIR}"