add tests for goto on tuple fields

crates/ra_ide/src/goto_definition.rs

@@ -446,6 +446,22 @@ mod tests {
         );
     }
 
+    #[test]
+    fn goto_for_tuple_fields() {
+        check_goto(
+            "
+            //- /lib.rs
+            struct Foo(u32);
+
+            fn bar() {
+                let foo = Foo(0);
+                foo.<|>0;
+            }
+            ",
+            "TUPLE_FIELD_DEF FileId(1) [11; 14)",
+        );
+    }
+
     #[test]
     fn goto_definition_works_for_ufcs_inherent_methods() {
         check_goto(

crates/ra_ide/src/goto_type_definition.rs

@@ -104,7 +104,7 @@ mod tests {
     }
 
     #[test]
-    fn goto_type_definition_works_param() {
+    fn goto_type_definition_for_param() {
         check_goto(
             "
             //- /lib.rs
@@ -114,4 +114,20 @@ mod tests {
             "Foo STRUCT_DEF FileId(1) [0; 11) [7; 10)",
         );
     }
+
+    #[test]
+    fn goto_type_definition_for_tuple_field() {
+        check_goto(
+            "
+            //- /lib.rs
+            struct Foo;
+            struct Bar(Foo);
+            fn foo() {
+                let bar = Bar(Foo);
+                bar.<|>0;
+            }
+            ",
+            "Foo STRUCT_DEF FileId(1) [0; 11) [7; 10)",
+        );
+    }
 }