[rust] Add rust_bench_test and rust_doc_test rules and improve usability of rust_test rule.

* Add rust_bench_test rule to run benchmark tests
* Add rust_doc_test rule to run Rust documentation tests.
* Enable rust_test and rust_bench_test to depend directly on a rust_library target.
* Rename rust_docs rule to rust_doc for consistency.

RELNOTES: [rust] Add rust_bench_test and rust_doc_test rules and improve usability of rust_test tule.

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MOS_MIGRATED_REVID=104648497

1 files changed, 11 insertions, 0 deletions

diff --git a/examples/rust/hello_lib/src/greeter.rs b/examples/rust/hello_lib/src/greeter.rs
index 2a7d7153b9..bf332e4bd1 100644
--- a/examples/rust/hello_lib/src/greeter.rs
+++ b/examples/rust/hello_lib/src/greeter.rs
@@ -60,3 +60,14 @@ impl Greeter {
         println!("{} {}", &self.greeting, thing);
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::Greeter;
+
+    #[test]
+    fn test_greeting() {
+        let hello = Greeter::new("Hi");
+        assert_eq!("Hi Rust", hello.greeting("Rust"));
+    }
+}