$ cargo test
   Compiling rectangle v0.1.0 (file:///projects/rectangle)
    Finished test [unoptimized + debuginfo] target(s) in 0.66s
     Running unittests (target/debug/deps/rectangle-6584c4561e48942e)

running 1 test
test tests::larger_can_hold_smaller ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

   Doc-tests rectangle

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s