rustdoc: Add test for correct LinkReplacer link matching

tests/rustdoc/intra-doc/issue-108459.rs

@@ -0,0 +1,35 @@
+#![deny(rustdoc::broken_intra_doc_links)]
+
+pub struct S;
+pub mod char {}
+
+// Ensure this doesn't ICE due to trying to slice off non-existent backticks from "S"
+
+/// See [S] and [`S`]
+pub struct MyStruct1;
+
+// Ensure that link texts are replaced correctly even if there are multiple links with the same target but different text
+
+/// See also [crate::char] and [mod@char] and [prim@char]
+// @has prim_precedence/struct.MyStruct2.html '//*[@href="char/index.html"]' 'crate::char'
+// @has - '//*[@href="char/index.html"]' 'char'
+// @has - '//*[@href="{{channel}}/std/primitive.char.html"]' 'char'
+pub struct MyStruct2;
+
+/// See also [mod@char] and [prim@char] and [crate::char]
+// @has prim_precedence/struct.MyStruct3.html '//*[@href="char/index.html"]' 'crate::char'
+// @has - '//*[@href="char/index.html"]' 'char'
+// @has - '//*[@href="{{channel}}/std/primitive.char.html"]' 'char'
+pub struct MyStruct3;
+
+// Ensure that links are correct even if there are multiple links with the same text but different targets
+
+/// See also [char][mod@char] and [char][prim@char]
+// @has prim_precedence/struct.MyStruct4.html '//*[@href="char/index.html"]' 'char'
+// @has - '//*[@href="{{channel}}/std/primitive.char.html"]' 'char'
+pub struct MyStruct4;
+
+/// See also [char][prim@char] and [char][crate::char]
+// @has prim_precedence/struct.MyStruct5.html '//*[@href="char/index.html"]' 'char'
+// @has - '//*[@href="{{channel}}/std/primitive.char.html"]' 'char'
+pub struct MyStruct5;