Write tutorial for testing in Masonry (#835) #2678

Job	Run time
Prime LFS Cache	6s
cargo check (aarch64-android)	22s
cargo check (msrv) (wasm32)	20s
cargo check (msrv) (windows-latest)	2m 12s
cargo clippy (windows-latest)	5m 24s
cargo check (msrv) (macos-latest)	42s
cargo clippy (wasm32)	1m 57s
cargo clippy (macos-latest)	2m 14s
cargo doc	40s
cargo check (msrv) (ubuntu-latest)	37s
cargo clippy (ubuntu-latest)	3m 30s
formatting	34s
cargo test (wasm32)	19s
typos	4s
cargo test (windows-latest)	2m 48s
cargo test (macos-latest)	2m 5s
cargo test (ubuntu-latest)	3m 8s
	27m 2s

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