#[test]
fn test_oneof_generation() {
    // In a real scenario, we'd build up a FileDescriptorSet from a proto.
    // For this unit test, we'll manually construct a DescriptorProto that has a oneof.

    // However, generate_rust_code takes a FileDescriptorSet.
    // Let's mock a simple setup.

    // Since manually constructing FileDescriptorSet is complex, let's instead check if the
    // generator logic for oneofs produces the expected strings given a DescriptorProto.

    // But the current tests use load_generated_code() which reads from data/request.bin.
    // Let's see if we can find a way to test just the write_message function or similar.
}