message: Add test for -Z check-cfg-features with namespaced features
diff: @@ -6071,3 +6071,44 @@ fn check_cfg_features_with_opt_deps() {
  )
  .run();
  }
  +
  +#[cfg_attr(windows, ignore)] // weird normalization issue with windows and cargo-test-support
  +#[cargo_test]
  +fn check_cfg_features_with_namespaced_features() {
  + if !is_nightly() {
  + // --check-cfg is a nightly only rustc command line
  + return;
  + }
  +
  + let p = project()
  + .file(
  + "Cargo.toml",
  + r#"
  + [project]
  + name = "foo"
  + version = "0.1.0"
  +
  + [dependencies]
  + bar = { path = "bar/", optional = true }
  +
  + [features]
  + f_a = ["dep:bar"]
  + f_b = []
  + "#,
  + )
  + .file("src/main.rs", "fn main() {}")
  + .file("bar/Cargo.toml", &basic_manifest("bar", "0.1.0"))
  + .file("bar/src/lib.rs", "#[allow(dead_code)] fn bar() {}")
  + .build();
  +
  + p.cargo("build -v -Z check-cfg-features")
  + .masquerade_as_nightly_cargo()
  + .with_stderr(
  + "\
  +[COMPILING] foo v0.1.0 [..]
  +[RUNNING] `rustc --crate-name foo [..] --check-cfg 'values(feature, \"f_a\", \"f_b\")' [..]
  +[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
  +",
  + )
  + .run();
  +}
  