test: Add more trait header test cases with comments

Author: ytmimi

tests/source/trait.rs

@@ -102,9 +102,26 @@ trait FooBar = Foo
 
 // #2637
 auto trait Example {}
+
+auto /* post auto comment */ trait AutoExampleWithComments {}
+
 pub auto trait PubExample {}
+
+pub /* post pub comment */ auto /* post auto comment */ trait PubAutoExampleWithComments {}
+
 pub unsafe auto trait PubUnsafeExample {}
 
+pub // post pub comment
+unsafe
+/* post unsafe comment */
+auto /* post auto comment */ trait PubUnsafeAutoExampleWithComments {}
+
+pub // post pub comment
+const /* post const comment */
+unsafe
+/* post unsafe comment */
+auto /* post auto comment */ trait PubConstUnsafeAutoExampleWithComments {}
+
 // #3006
 trait Foo<'a> {
     type Bar<  'a  >;

tests/target/trait.rs

@@ -137,9 +137,30 @@ trait FooBar = Foo
 
 // #2637
 auto trait Example {}
+
+auto /* post auto comment */ trait AutoExampleWithComments {}
+
 pub auto trait PubExample {}
+
+pub /* post pub comment */ auto /* post auto comment */ trait PubAutoExampleWithComments {}
+
 pub unsafe auto trait PubUnsafeExample {}
 
+pub // post pub comment
+unsafe
+/* post unsafe comment */
+auto /* post auto comment */ trait PubUnsafeAutoExampleWithComments
+{
+}
+
+pub // post pub comment
+const /* post const comment */
+unsafe
+/* post unsafe comment */
+auto /* post auto comment */ trait PubConstUnsafeAutoExampleWithComments
+{
+}
+
 // #3006
 trait Foo<'a> {
     type Bar<'a>;