Tests
Cargo can run your tests with the cargo test command. Cargo looks for tests
to run in two places: in each of your src files and any tests in tests/.
Tests in your src files should be unit tests, and tests in tests/ should be
integration-style tests. As such, you’ll need to import your crates into
the files in tests.
Here's an example of running cargo test in our project, which currently has
no tests:
$ cargo test
Compiling rand v0.1.0 (https://github.com/rust-lang-nursery/rand.git#9f35b8e)
Compiling hello_world v0.1.0 (file:///path/to/project/hello_world)
Running target/test/hello_world-9c2b65bbb79eabce
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
If our project had tests, we would see more output with the correct number of tests.
You can also run a specific test by passing a filter:
$ cargo test foo
This will run any test with foo in its name.
cargo test runs additional checks as well. For example, it will compile any
examples you’ve included and will also test the examples in your
documentation. Please see the testing guide in the Rust
documentation for more details.