Adding upstream version 1.2+20240521.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/inputs/oneof_empty/oneof_empty.json

@@ -0,0 +1,3 @@
+{
+  "nothing": {}
+}

tests/inputs/oneof_empty/oneof_empty.proto

@@ -0,0 +1,17 @@
+syntax = "proto3";
+
+package oneof_empty;
+
+message Nothing {}
+
+message MaybeNothing {
+  string sometimes = 42;
+}
+
+message Test {
+  oneof empty {
+    Nothing nothing = 1;
+    MaybeNothing maybe1 = 2;
+    MaybeNothing maybe2 = 3;
+  }
+}

tests/inputs/oneof_empty/oneof_empty_maybe1.json

@@ -0,0 +1,3 @@
+{
+  "maybe1": {}
+}

tests/inputs/oneof_empty/oneof_empty_maybe2.json

@@ -0,0 +1,5 @@
+{
+  "maybe2": {
+    "sometimes": "now"
+  }
+}