Add stderr checking for the conditional test well known cfg

Author: Urgau

tests/testsuite/check_cfg.rs

@@ -317,7 +317,7 @@ fn well_known_names_values_doctest() {
         .run();
 }
 
-#[cargo_test]
+#[cargo_test(nightly, reason = "warning currently only on nightly")]
 fn test_false_lib() {
     let p = project()
         .file(
@@ -332,26 +332,68 @@ fn test_false_lib() {
                 test = false
             "#,
         )
-        .file("src/lib.rs", "")
+        .file("src/lib.rs", "#[cfg(test)] mod tests {}")
         .build();
 
     p.cargo("check -v")
         .with_stderr_does_not_contain(x!("rustc" => "cfg" of "docsrs,test"))
         .with_stderr_contains(x!("rustc" => "cfg" of "docsrs"))
+        .with_stderr_data(str![[r#"
+...
+[WARNING] unexpected `cfg` condition name: `test`
+ --> src/lib.rs:1:7
+  |
+1 | #[cfg(test)] mod tests {}
+  |       ^^^^
+...
+
+[WARNING] `foo` (lib) generated 1 warning
+[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+
+"#]])
         .run();
 
     p.cargo("clean").run();
     p.cargo("test -v")
         .with_stderr_contains(x!("rustc" => "cfg" of "docsrs"))
+        .with_stderr_data(str![[r#"
+...
+[WARNING] unexpected `cfg` condition name: `test`
+ --> src/lib.rs:1:7
+  |
+1 | #[cfg(test)] mod tests {}
+  |       ^^^^
+...
+
+[WARNING] `foo` (lib) generated 1 warning
+[FINISHED] `test` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+[DOCTEST] foo
+[RUNNING] [..]
+
+"#]])
         .run();
 
     p.cargo("clean").run();
     p.cargo("test --lib -v")
         .with_stderr_contains(x!("rustc" => "cfg" of "docsrs"))
+        .with_stderr_data(str![[r#"
+...
+[WARNING] unexpected `cfg` condition name: `test`
+ --> src/lib.rs:1:7
+  |
+1 | #[cfg(test)] mod tests {}
+  |       ^^^^
+...
+
+[WARNING] `foo` (lib test) generated 1 warning
+[FINISHED] `test` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+[RUNNING] `[ROOT]/foo/target/debug/deps/foo-[HASH]`
+
+"#]])
         .run();
 }
 
-#[cargo_test]
+#[cargo_test(nightly, reason = "warning currently only on nightly")]
 fn test_false_bins() {
     let p = project()
         .file(
@@ -368,17 +410,30 @@ fn test_false_bins() {
                 path = "src/deamon.rs"
             "#,
         )
-        .file("src/main.rs", "fn main() {}")
-        .file("src/deamon.rs", "fn main() {}")
+        .file("src/main.rs", "fn main() {}\n#[cfg(test)] mod tests {}")
+        .file("src/deamon.rs", "fn main() {}\n#[cfg(test)] mod tests {}")
         .build();
 
     p.cargo("check -v")
         .with_stderr_contains(x!("rustc" => "cfg" of "docsrs,test")) // for foo
         .with_stderr_contains(x!("rustc" => "cfg" of "docsrs")) // for deamon
+        .with_stderr_data(str![[r#"
+...
+[WARNING] unexpected `cfg` condition name: `test`
+ --> src/deamon.rs:2:7
+  |
+2 | #[cfg(test)] mod tests {}
+  |       ^^^^
+...
+
+[WARNING] `foo` (bin "daemon") generated 1 warning
+[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+
+"#]])
         .run();
 }
 
-#[cargo_test]
+#[cargo_test(nightly, reason = "warning currently only on nightly")]
 fn test_false_examples() {
     let p = project()
         .file(
@@ -398,13 +453,35 @@ fn test_false_examples() {
                 path = "src/deamon.rs"
             "#,
         )
-        .file("src/lib.rs", "")
-        .file("src/deamon.rs", "fn main() {}")
+        .file("src/lib.rs", "#[cfg(test)] mod tests {}")
+        .file("src/deamon.rs", "fn main() {}\n#[cfg(test)] mod tests {}")
         .build();
 
     p.cargo("check --examples -v")
         .with_stderr_does_not_contain(x!("rustc" => "cfg" of "docsrs,test"))
         .with_stderr_contains(x!("rustc" => "cfg" of "docsrs"))
+        .with_stderr_data(str![[r#"
+...
+[WARNING] unexpected `cfg` condition name: `test`
+ --> src/lib.rs:1:7
+  |
+1 | #[cfg(test)] mod tests {}
+  |       ^^^^
+...
+
+[WARNING] `foo` (lib) generated 1 warning
+...
+[WARNING] unexpected `cfg` condition name: `test`
+ --> src/deamon.rs:2:7
+  |
+2 | #[cfg(test)] mod tests {}
+  |       ^^^^
+...
+
+[WARNING] `foo` (example "daemon") generated 1 warning
+[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+
+"#]])
         .run();
 }