test: Add tests for refs to methods in templates (#286)

Author: varungandhi-src

test/index/functions/methods.cc

@@ -75,3 +75,22 @@ void test_member_pointer() {
   M0 m{};
   (m.*p)();
 }
+
+template <typename T>
+struct T0 {
+  void f0() {}
+};
+
+template <typename T>
+struct T1: T0<T> {
+  void f1() {
+    this->f0();
+  }
+};
+
+void test_template() {
+  T0<int>().f0();
+  T1<int>().f1();
+  auto t1 = T1<int>();
+  t1.f0();
+}

test/index/functions/methods.snapshot.cc

@@ -165,3 +165,39 @@
 //   ^ reference local 1
 //      ^ reference local 0
   }
+  
+  template <typename T>
+//                   ^ definition local 2
+  struct T0 {
+//       ^^ definition [..] T0#
+    void f0() {}
+//       ^^ definition [..] T0#f0(49f6e7a06ebc5aa8).
+  };
+  
+  template <typename T>
+//                   ^ definition local 3
+  struct T1: T0<T> {
+//       ^^ definition [..] T1#
+//           ^^ reference [..] T0#
+//              ^ reference local 3
+    void f1() {
+//       ^^ definition [..] T1#f1(49f6e7a06ebc5aa8).
+      this->f0();
+    }
+  };
+  
+  void test_template() {
+//     ^^^^^^^^^^^^^ definition [..] test_template(49f6e7a06ebc5aa8).
+    T0<int>().f0();
+//  ^^ reference [..] T0#
+//            ^^ reference [..] T0#f0(49f6e7a06ebc5aa8).
+    T1<int>().f1();
+//  ^^ reference [..] T1#
+//            ^^ reference [..] T1#f1(49f6e7a06ebc5aa8).
+    auto t1 = T1<int>();
+//       ^^ definition local 4
+//            ^^ reference [..] T1#
+    t1.f0();
+//  ^^ reference local 4
+//     ^^ reference [..] T0#f0(49f6e7a06ebc5aa8).
+  }