Add test with attrs

tests/ui/exhaustive_items.fixed

@@ -16,6 +16,16 @@ pub mod enums {
         Quux(String),
     }
 
+    /// Some docs
+    #[repr(C)]
+    #[non_exhaustive]
+    pub enum ExhaustiveWithAttrs {
+        Foo,
+        Bar,
+        Baz,
+        Quux(String),
+    }
+
     // no warning, already non_exhaustive
     #[non_exhaustive]
     pub enum NonExhaustive {

tests/ui/exhaustive_items.rs

@@ -15,6 +15,15 @@ pub enum Exhaustive {
         Quux(String),
     }
 
+    /// Some docs
+    #[repr(C)]
+    pub enum ExhaustiveWithAttrs {
+        Foo,
+        Bar,
+        Baz,
+        Quux(String),
+    }
+
     // no warning, already non_exhaustive
     #[non_exhaustive]
     pub enum NonExhaustive {

tests/ui/exhaustive_items.stderr

@@ -20,8 +20,25 @@ LL |     #[non_exhaustive]
 LL |     pub enum Exhaustive {
    |
 
+error: exported enums should not be exhaustive
+  --> $DIR/exhaustive_items.rs:20:5
+   |
+LL | /     pub enum ExhaustiveWithAttrs {
+LL | |         Foo,
+LL | |         Bar,
+LL | |         Baz,
+LL | |         Quux(String),
+LL | |     }
+   | |_____^
+   |
+help: try adding #[non_exhaustive]
+   |
+LL |     #[non_exhaustive]
+LL |     pub enum ExhaustiveWithAttrs {
+   |
+
 error: exported structs should not be exhaustive
-  --> $DIR/exhaustive_items.rs:46:5
+  --> $DIR/exhaustive_items.rs:55:5
    |
 LL | /     pub struct Exhaustive {
 LL | |         foo: u8,
@@ -40,5 +57,5 @@ LL |     #[non_exhaustive]
 LL |     pub struct Exhaustive {
    |
 
-error: aborting due to 2 previous errors
+error: aborting due to 3 previous errors