Add test for environment variables in verbose mode for cargo bench

tests/testsuite/bench.rs

@@ -1688,3 +1688,40 @@ error: unexpected argument `--keep-going` found
  .with_status(101)
  .run();
 }
+
+#[cargo_test(nightly, reason = "bench")]
+fn cargo_bench_print_env_verbose() {
+ let p = project()
+ .file("Cargo.toml", &basic_manifest("foo", "0.0.1"))
+ .file(
+ "src/main.rs",
+ r#"
+ #![feature(test)]
+ #[cfg(test)]
+ extern crate test;
+
+ fn hello() -> &'static str {
+ "hello"
+ }
+
+ pub fn main() {
+ println!("{}", hello())
+ }
+
+ #[bench]
+ fn bench_hello(_b: &mut test::Bencher) {
+ assert_eq!(hello(), "hello")
+ }
+ "#,
+ )
+ .build();
+ p.cargo("bench -vv")
+ .with_stderr(
+ "\
+[COMPILING] foo v0.0.1 ([CWD])
+[RUNNING] `[..]CARGO_MANIFEST_DIR=[CWD][..] rustc[..]`
+[FINISHED] bench [optimized] target(s) in [..]
+[RUNNING] `[..]CARGO_MANIFEST_DIR=[CWD][..] [CWD]/target/release/deps/foo-[..][EXE] --bench`",
+ )
+ .run();
+}