test

a bit more test coverage #127

Job	Run time
cargo_audit	7s
cargo_deny	51s
build (1.72, thumbv7em-none-eabi)	17s
cargo_outdated	7s
build (1.72, wasm32-unknown-unknown)	21s
clippy	27s
coverage	1m 8s
build (1.72, s390x-unknown-linux-gnu)	24s
build (1.72, powerpc64-unknown-linux-gnu)	22s
cross (armv7-unknown-linux-gnueabihf, 1.72)	1m 47s
doc	24s
build (1.72, riscv64gc-unknown-none-elf)	19s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 20s
test (i686-unknown-linux-gnu, 1.72, sudo apt update && sudo apt install gcc-multilib)	1m 21s
build (1.72, x86_64-pc-windows-gnu)	19s
cross (aarch64-unknown-linux-gnu, 1.72)	1m 44s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 7s
build (1.72, x86_64-apple-darwin)	20s
test (x86_64-unknown-linux-gnu, 1.72)	1m 8s
cross (aarch64-unknown-linux-gnu, stable)	1m 19s
build (stable, thumbv7em-none-eabi)	20s
test (x86_64-unknown-linux-gnu, stable)	1m 8s
cross (powerpc-unknown-linux-gnu, 1.72)	1m 45s
build (stable, wasm32-unknown-unknown)	24s
cross (powerpc-unknown-linux-gnu, stable)	1m 22s
build (stable, s390x-unknown-linux-gnu)	12s
build (stable, powerpc64-unknown-linux-gnu)	29s
build (stable, riscv64gc-unknown-none-elf)	26s
build (stable, x86_64-pc-windows-gnu)	32s
build (stable, x86_64-apple-darwin)	11s
	22m 1s

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