$ cargo test
Compiling adder v0.1.0 (file:///projects/adder)
Finished test [unoptimized + debuginfo] target(s) in 0.58s
- Running unittests (target/debug/deps/adder-92948b65e88960b4)
+ Running unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)
running 1 test
test tests::it_adds_two ... ok