Add regression test for rust-lang#123435

tests/rustdoc/inline_cross/inline_hidden.rs

@@ -4,9 +4,23 @@
 
 extern crate rustdoc_hidden;
 
+// @has inline_hidden/index.html
+// Ensures this item is not inlined.
+// @has - '//*[@id="reexport.Foo"]/code' 'pub use rustdoc_hidden::Foo;'
 #[doc(no_inline)]
 pub use rustdoc_hidden::Foo;
 
+// Even if the foreign item has `doc(hidden)`, we should be able to inline it.
+// @has - '//*[@class="item-name"]/a[@class="struct"]' 'Inlined'
+#[doc(inline)]
+pub use rustdoc_hidden::Foo as Inlined;
+
+// Even with this import, we should not see `Foo`.
+// @count - '//*[@class="item-name"]' 4
+// @has - '//*[@class="item-name"]/a[@class="struct"]' 'Bar'
+// @has - '//*[@class="item-name"]/a[@class="fn"]' 'foo'
+pub use rustdoc_hidden::*;
+
 // @has inline_hidden/fn.foo.html
 // @!has - '//a/@title' 'Foo'
 pub fn foo(_: Foo) {}