Add test case for disabling #[non_exhaustive]

test-crates/protobuf-codegen-protoc-test/src/common/v2/test_oneof_nonexhaustive.rs

@@ -0,0 +1,15 @@
+use protobuf::OneofFull;
+use protobuf_test_common::*;
+
+use super::test_oneof_nonexhaustive_pb::*;
+
+#[test]
+fn test_oneof_nonexhaustive_disabled() {
+    use message_with_oneof_nonexhaustive_disabled::One;
+    match MessageWithOneofNonexhaustiveDisabled::default().one {
+        None => (),
+        Some(one) => match one {
+            One::FirstField(_) | One::SecondField(_) => (),
+        },
+    }
+}

test-crates/protobuf-codegen-protoc-test/src/common/v2/test_oneof_nonexhaustive_pb.proto

@@ -0,0 +1,14 @@
+syntax = "proto2";
+
+import "rustproto.proto";
+
+package test_oneof;
+
+message MessageWithOneofNonexhaustiveDisabled{
+    option (rustproto.oneofs_non_exhaustive) = false;
+
+    oneof one {
+        uint32 first_field = 1;
+        string second_field = 2;
+    }
+}