| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // NOTE: The comments that have [START/END ...] in them are used to identify code snippets that |
| // appear in the documentation. Please be aware that changes in these blocks will affect the |
| // documentation on fuchsia.dev. |
| // You can find the usages in the documenation by running: |
| // find docs -name "*.md" | xargs \ |
| // grep "\{% includecode .*gerrit_path=\"examples/hello_world/rust/src/main.rs\"" |
| |
| // [START main] |
| fn main() { |
| println!("{}, world!", greeting()); |
| eprintln!("{}, world!", greeting()); |
| } |
| |
| fn greeting() -> String { |
| return String::from("Hello"); |
| } |
| // [END main] |
| |
| // [START test_mod] |
| #[cfg(test)] |
| mod tests { |
| #[fuchsia::test] |
| fn it_works() { |
| assert_eq!(true, true); |
| } |
| } |
| // [END test_mod] |
| |
| #[cfg(test)] |
| mod hello_tests { |
| use crate::greeting; |
| |
| // [START async_test] |
| #[fuchsia::test] |
| async fn my_test() { |
| let some_future = async { 4 }; |
| assert_eq!(some_future.await, 4); |
| } |
| // [END async_test] |
| |
| #[fuchsia::test] |
| fn greeting_test() { |
| let expected = String::from("Hello"); |
| assert_eq!(greeting(), expected) |
| } |
| } |