add test

Author: Kohei316

tests/ui/typeck/auxiliary/suggest-trait-reexported-as-not-doc-visible-a.rs

@@ -1,5 +1,13 @@
 //@ edition: 2021
 
-pub trait Foo {
-    fn foo();
+pub trait TraitA {
+    fn a();
+}
+
+pub trait TraitB {
+    fn b();
+}
+
+pub trait TraitC {
+    fn c();
 }

tests/ui/typeck/auxiliary/suggest-trait-reexported-as-not-doc-visible-b.rs

@@ -2,13 +2,28 @@
 //@ edition: 2021
 //@ aux-crate:suggest_trait_reexported_as_not_doc_visible_a=suggest-trait-reexported-as-not-doc-visible-a.rs
 
-pub struct Bar;
-
-impl __DocHidden::Foo for Bar {
-    fn foo() {}
-}
+#[doc(hidden)]
+pub use suggest_trait_reexported_as_not_doc_visible_a::TraitA;
 
 #[doc(hidden)]
 pub mod __DocHidden {
-    pub use suggest_trait_reexported_as_not_doc_visible_a::Foo;
+    pub use suggest_trait_reexported_as_not_doc_visible_a::TraitB;
+
+    pub mod Inner {
+        pub use suggest_trait_reexported_as_not_doc_visible_a::TraitC;
+    }
+}
+
+impl suggest_trait_reexported_as_not_doc_visible_a::TraitA for Foo {
+    fn a() {}
 }
+
+impl __DocHidden::TraitB for Foo {
+    fn b() {}
+}
+
+impl __DocHidden::Inner::TraitC for Foo {
+    fn c() {}
+}
+
+pub struct Foo;

tests/ui/typeck/suggest-trait-reexported-as-not-doc-visible.rs

@@ -3,9 +3,11 @@
 //@ aux-crate:suggest_trait_reexported_as_not_doc_visible_a=suggest-trait-reexported-as-not-doc-visible-a.rs
 //@ aux-crate:suggest_trait_reexported_as_not_doc_visible_b=suggest-trait-reexported-as-not-doc-visible-b.rs
 
-use suggest_trait_reexported_as_not_doc_visible_b::Bar;
+use suggest_trait_reexported_as_not_doc_visible_b::Foo;
 
 fn main() {
-    Bar::foo();
-    //~^ ERROR: no function or associated item named `foo` found for struct `Bar` in the current scope [E0599]
+    Foo::a();
+    //~ no function or associated item named `a` found for struct `Foo` in the current scope [E0599]
+    Foo::b();
+    Foo::c();
 }

tests/ui/typeck/suggest-trait-reexported-as-not-doc-visible.stderr

@@ -1,15 +1,54 @@
-error[E0599]: no function or associated item named `foo` found for struct `Bar` in the current scope
+error[E0599]: no function or associated item named `a` found for struct `Foo` in the current scope
   --> $DIR/suggest-trait-reexported-as-not-doc-visible.rs:9:10
    |
-LL |     Bar::foo();
-   |          ^^^ function or associated item not found in `Bar`
+LL |     Foo::a();
+   |          ^ function or associated item not found in `Foo`
    |
    = help: items from traits can only be used if the trait is in scope
-help: trait `Foo` which provides `foo` is implemented but not in scope; perhaps you want to import it
+help: trait `TraitA` which provides `a` is implemented but not in scope; perhaps you want to import it
    |
-LL + use suggest_trait_reexported_as_not_doc_visible_a::Foo;
+LL + use suggest_trait_reexported_as_not_doc_visible_b::TraitA;
+   |
+help: there is an associated function `b` with a similar name
+   |
+LL -     Foo::a();
+LL +     Foo::b();
+   |
+
+error[E0599]: no function or associated item named `b` found for struct `Foo` in the current scope
+  --> $DIR/suggest-trait-reexported-as-not-doc-visible.rs:10:10
+   |
+LL |     Foo::b();
+   |          ^ function or associated item not found in `Foo`
+   |
+   = help: items from traits can only be used if the trait is in scope
+help: trait `TraitB` which provides `b` is implemented but not in scope; perhaps you want to import it
+   |
+LL + use suggest_trait_reexported_as_not_doc_visible_a::TraitB;
+   |
+help: there is an associated function `a` with a similar name
+   |
+LL -     Foo::b();
+LL +     Foo::a();
+   |
+
+error[E0599]: no function or associated item named `c` found for struct `Foo` in the current scope
+  --> $DIR/suggest-trait-reexported-as-not-doc-visible.rs:11:10
+   |
+LL |     Foo::c();
+   |          ^ function or associated item not found in `Foo`
+   |
+   = help: items from traits can only be used if the trait is in scope
+help: trait `TraitC` which provides `c` is implemented but not in scope; perhaps you want to import it
+   |
+LL + use suggest_trait_reexported_as_not_doc_visible_a::TraitC;
+   |
+help: there is an associated function `a` with a similar name
+   |
+LL -     Foo::c();
+LL +     Foo::a();
    |
 
-error: aborting due to 1 previous error
+error: aborting due to 3 previous errors
 
 For more information about this error, try `rustc --explain E0599`.