Merge pull request google#663 from google:test_reference_type

PiperOrigin-RevId: 779109808

Author: copybara-github

googletest/tests/reference_type_test.rs

@@ -0,0 +1,51 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#[derive(Debug)]
+struct ArenaHolder<'a, T: ?Sized> {
+    value: &'a T,
+}
+
+impl<'a, T: PartialEq + ?Sized> PartialEq<T> for ArenaHolder<'a, T> {
+    fn eq(&self, other: &T) -> bool {
+        self.value == other
+    }
+}
+
+struct Strukt {
+    a_field: String,
+}
+
+impl<'a> ArenaHolder<'a, Strukt> {
+    fn get_a_field(&self) -> ArenaHolder<'_, str> {
+        ArenaHolder { value: &self.value.a_field }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use googletest::prelude::*;
+
+    #[gtest]
+    fn test() {
+        let arena = [Strukt { a_field: "hello".into() }];
+
+        let holder = ArenaHolder { value: &arena[0] };
+
+        let inner_holder = holder.get_a_field();
+
+        expect_that!(inner_holder, eq("hello"));
+    }
+}