chore(test): Refactor skip debug test

tests/skip_debug/Cargo.toml

@@ -13,5 +13,4 @@ prost = "0.13"
 tonic = { path = "../../tonic" }
 
 [build-dependencies]
-prost-build = "0.13"
 tonic-build = { path = "../../tonic-build" }

tests/skip_debug/build.rs

@@ -1,26 +1,9 @@
 fn main() {
-    let config = prost_build::Config::default();
     tonic_build::configure()
         .skip_debug("test.Test")
         .skip_debug("test.Output")
         .build_client(true)
         .build_server(true)
-        .compile_protos_with_config(config, &["proto/test.proto"], &["proto"])
+        .compile_protos(&["proto/test.proto"], &["proto"])
         .unwrap();
-
-    // Add a dummy impl Debug to the skipped debug implementations to avoid missing impl Debug errors
-    let out = std::path::PathBuf::from(std::env::var("OUT_DIR").unwrap());
-    let file_path = out.join("test.rs");
-    let mut file_contents = std::fs::read_to_string(&file_path).unwrap();
-    let debug_impl = r#"
-impl std::fmt::Debug for Output {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("Output").finish()
-    }
-}
-"#;
-    file_contents.push_str(debug_impl);
-
-    // Replace the original file with the modified content
-    std::fs::write(&file_path, file_contents).unwrap();
 }

tests/skip_debug/src/lib.rs

@@ -1,3 +1,11 @@
 pub mod pb {
     tonic::include_proto!("test");
+
+    // Add a dummy impl Debug to the skipped debug implementations to avoid
+    // missing impl Debug errors and check debug is not implemented for Output.
+    impl std::fmt::Debug for Output {
+        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+            f.debug_struct("Output").finish()
+        }
+    }
 }