Remove the overlay hack from Rust conformance test now that we can use the enum directly.

PiperOrigin-RevId: 604226236

conformance/conformance_rust.rs

@@ -4,8 +4,7 @@
 // license that can be found in the LICENSE file or at
 // https://developers.google.com/open-source/licenses/bsd
 
-use conformance_proto::{ConformanceRequest, ConformanceResponse};
-use conformance_rust_overlay_hack_proto::ConformanceRequestRustOverlayHack;
+use conformance_proto::{ConformanceRequest, ConformanceResponse, WireFormat};
 
 #[cfg(cpp_kernel)]
 use protobuf_cpp as kernel;
@@ -40,21 +39,13 @@ fn read_little_endian_i32_from_stdin() -> Option<i32> {
 /// Returns None if we have hit an EOF that suggests the test suite is complete.
 /// Panics in any other case (e.g. an EOF in a place that would imply a
 /// programmer error in the conformance test suite).
-fn read_request_from_stdin() -> Option<(ConformanceRequest, ConformanceRequestRustOverlayHack)> {
+fn read_request_from_stdin() -> Option<ConformanceRequest> {
     let msg_len = read_little_endian_i32_from_stdin()?;
     let mut serialized = vec![0_u8; msg_len as usize];
     io::stdin().read_exact(&mut serialized).unwrap();
     let mut req = ConformanceRequest::new();
     req.deserialize(&serialized).unwrap();
-
-    // TODO: b/318373255 - Since enum accessors aren't available yet, we parse an
-    // overlay with int32 field instead of an enum so that we can check if the
-    // requested output is binary or not. This will be deleted once enum
-    // accessors are supported.
-    let mut req_overlay_hack = ConformanceRequestRustOverlayHack::new();
-    req_overlay_hack.deserialize(&serialized).unwrap();
-
-    Some((req, req_overlay_hack))
+    Some(req)
 }
 
 fn write_response_to_stdout(resp: &ConformanceResponse) {
@@ -66,16 +57,11 @@ fn write_response_to_stdout(resp: &ConformanceResponse) {
     handle.flush().unwrap();
 }
 
-fn do_test(
-    req: &ConformanceRequest,
-    req_overlay_hack: &ConformanceRequestRustOverlayHack,
-) -> ConformanceResponse {
+fn do_test(req: &ConformanceRequest) -> ConformanceResponse {
     let mut resp = ConformanceResponse::new();
     let message_type = req.message_type();
 
-    // TODO: b/318373255 - Use the enum once its supported.
-    // if req.requested_output_format() != WireFormat.PROTOBUF {
-    if req_overlay_hack.requested_output_format() != 1 {
+    if req.requested_output_format() != WireFormat::Protobuf {
         resp.skipped_mut().set("only wire format output implemented");
         return resp;
     }
@@ -130,8 +116,8 @@ fn do_test(
 
 fn main() {
     let mut total_runs = 0;
-    while let Some((req, req_overlay_hack)) = read_request_from_stdin() {
-        let resp = do_test(&req, &req_overlay_hack);
+    while let Some(req) = read_request_from_stdin() {
+        let resp = do_test(&req);
         write_response_to_stdout(&resp);
         total_runs += 1;
     }

conformance/conformance_rust_overlay_hack.proto

@@ -1,10 +0,0 @@
-syntax = "proto3";
-
-package conformance;
-
-// Temporary hack to allow the Rust conformance test to read the requested
-// output format as an int32. This will be removed once enums accessors are
-// supported. b/318373255
-message ConformanceRequestRustOverlayHack {
-  int32 requested_output_format = 3;
-}