Create CursorTest harness #747

Job	Run time
cargo clippy (android) (armv7-linux-androideabi)	1m 2s
cargo clippy (windows-latest)	1m 45s
cargo check (msrv) (windows-latest)	1m 14s
cargo clippy (android) (aarch64-linux-android)	1m 45s
cargo clippy (macos-latest)	1m 6s
cargo check (msrv) (android) (armv7-linux-androideabi)	32s
cargo check (msrv) (macos-latest)	28s
cargo clippy (android) (x86_64-linux-android)	1m 38s
cargo check (msrv) (android) (aarch64-linux-android)	54s
cargo clippy (ubuntu-latest)	1m 7s
cargo check (msrv) (ubuntu-latest)	24s
cargo check (msrv) (android) (x86_64-linux-android)	56s
cargo doc (windows-latest)	1m 8s
formatting	23s
cargo doc (macos-latest)	22s
cargo test (windows-latest)	1m 58s
typos	3s
cargo doc (ubuntu-latest)	23s
cargo test (macos-latest)	32s
cargo test (ubuntu-latest)	29s
	18m 9s

Provide feedback