Add regression test for #109258

Author: GuillaumeGomez

tests/rustdoc/issue-109258-missing-private-inlining.rs

@@ -0,0 +1,27 @@
+// Regression test for <https://github.com/rust-lang/rust/issues/109258>.
+
+#![crate_name = "foo"]
+
+// @has 'foo/index.html'
+// We should only have a "Re-exports" and a "Modules" headers.
+// @count - '//*[@id="main-content"]/h2[@class="small-section-header"]' 2
+// @has - '//*[@id="main-content"]/h2[@class="small-section-header"]' 'Re-exports'
+// @has - '//*[@id="main-content"]/h2[@class="small-section-header"]' 'Modules'
+
+// @has - '//*[@id="reexport.Foo"]' 'pub use crate::issue_109258::Foo;'
+// @has - '//*[@id="reexport.Foo"]//a[@href="issue_109258/struct.Foo.html"]' 'Foo'
+// @!has 'foo/struct.Foo.html'
+pub use crate::issue_109258::Foo;
+
+// @has 'foo/issue_109258/index.html'
+// We should only have a "Structs" header.
+// @count - '//*[@id="main-content"]/h2[@class="small-section-header"]' 1
+// @has - '//*[@id="main-content"]/h2[@class="small-section-header"]' 'Structs'
+// @has - '//*[@id="main-content"]//a[@href="struct.Foo.html"]' 'Foo'
+// @has 'foo/issue_109258/struct.Foo.html'
+pub mod issue_109258 {
+    mod priv_mod {
+        pub struct Foo;
+    }
+    pub use self::priv_mod::Foo;
+}