Test

Refine code. #1603

Job	Run time
multiple-arch-aarch64	5m 50s
multiple-arch-armv7	5m 35s
cygwin64-cache	1m 46s
utest-regression-blackbox-test	8m 29s
cygwin64	7m 54s
fast	1s
build-ubuntu16	1m 31s
build-centos7	2m 14s
build-cross-aarch64	2m 12s
build-cross-arm	2m 28s
build-ubuntu18	1m 33s
build-ubuntu20	1m 49s
coverage	2m 22s
multiple-arch-amd64	1m 16s
test-done	1s
	45m 1s

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