Test

Refine code. #1602

Job	Run time
multiple-arch-aarch64	5m 32s
cygwin64-cache	1m 54s
multiple-arch-armv7	5m 40s
utest-regression-blackbox-test	8m 27s
cygwin64	6m 49s
fast	1s
build-centos7	2m 9s
build-ubuntu20	1m 42s
build-cross-aarch64	2m 23s
build-cross-arm	2m 24s
build-ubuntu16	1m 27s
build-ubuntu18	1m 28s
coverage	2m 27s
multiple-arch-amd64	1m 17s
test-done	1s
	43m 41s

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