test: Implement integration tests #1143

Job	Run time
Build and test (stable, --no-default-features)	1m 21s
Build and test (stable, --features default)	1m 15s
Clippy (--all-features)	1m 40s
Build and test (stable, --all-features)	2m 48s
Clippy (--no-default-features)	1m 19s
Rust fmt	26s
	8m 49s

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