Add test for macro disambiguators

Author: LeSeulArtichaut

src/test/rustdoc/intra-doc/macros-disambiguators.rs

@@ -0,0 +1,25 @@
+#![crate_name = "foo"]
+#![deny(rustdoc::broken_intra_doc_links)]
+
+//! [foo!()]
+// @has foo/index.html '//a[@href="macro.foo.html"]' 'foo!()'
+
+//! [foo!{}]
+// @has - '//a[@href="macro.foo.html"]' 'foo!{}'
+
+//! [foo![]](foo![])
+// @has - '//a[@href="macro.foo.html"]' 'foo![]'
+
+//! [foo1](foo!())
+// @has - '//a[@href="macro.foo.html"]' 'foo1'
+
+//! [foo2](foo!{})
+// @has - '//a[@href="macro.foo.html"]' 'foo2'
+
+//! [foo3](foo![])
+// @has - '//a[@href="macro.foo.html"]' 'foo3'
+
+#[macro_export]
+macro_rules! foo {
+    () => {};
+}