Update jump to def macro link generation test

tests/rustdoc/jump-to-def/assoc-items.rs

@@ -26,8 +26,9 @@ impl C {
     pub fn wat() {}
 }
 
-//@ has - '//a[@href="{{channel}}/core/fmt/macros/macro.Debug.html"]' 'Debug'
-//@ has - '//a[@href="{{channel}}/core/cmp/macro.PartialEq.html"]' 'PartialEq'
+// These two links must not change and in particular must contain `/derive.`!
+//@ has - '//a[@href="{{channel}}/core/fmt/macros/derive.Debug.html"]' 'Debug'
+//@ has - '//a[@href="{{channel}}/core/cmp/derive.PartialEq.html"]' 'PartialEq'
 #[derive(Debug, PartialEq)]
 pub struct Bar;
 impl Trait for Bar {

tests/rustdoc/jump-to-def/derive-macro.rs

@@ -0,0 +1,24 @@
+// This test ensures that the same link is generated in both intra-doc links
+// and in jump to def links.
+
+//@ compile-flags: -Zunstable-options --generate-link-to-definition
+
+#![crate_name = "foo"]
+
+// First we check intra-doc links.
+//@ has 'foo/struct.Bar.html'
+//@ has - '//a[@href="{{channel}}/core/fmt/macros/derive.Debug.html"]' 'Debug'
+//@ has - '//a[@href="{{channel}}/core/cmp/derive.PartialEq.html"]' 'PartialEq'
+
+// We also check the "title" attributes.
+//@ has - '//a[@href="{{channel}}/core/fmt/macros/derive.Debug.html"]/@title' 'derive core::fmt::macros::Debug'
+//@ has - '//a[@href="{{channel}}/core/cmp/derive.PartialEq.html"]/@title' 'derive core::cmp::PartialEq'
+
+// Then we check that they are the same in jump to def.
+
+/// [Debug][derive@Debug] and [PartialEq][derive@PartialEq]
+//@ has 'src/foo/derive-macro.rs.html'
+//@ has - '//a[@href="{{channel}}/core/fmt/macros/derive.Debug.html"]' 'Debug'
+//@ has - '//a[@href="{{channel}}/core/cmp/derive.PartialEq.html"]' 'PartialEq'
+#[derive(Debug, PartialEq)]
+pub struct Bar;