test: add unit test

x/wasm/keeper/query_plugins_test.go

@@ -749,6 +749,31 @@ func TestConvertProtoToJSONMarshal(t *testing.T) {
 	}
 }
 
+func TestResetProtoMarshalerAfterJsonMarshal(t *testing.T) {
+	appCodec := app.MakeEncodingConfig().Marshaler
+
+	protoMarshaler := &banktypes.QueryAllBalancesResponse{}
+	expected := appCodec.MustMarshalJSON(&banktypes.QueryAllBalancesResponse{
+		Balances: sdk.NewCoins(sdk.NewCoin("bar", sdk.NewInt(30))),
+		Pagination: &query.PageResponse{
+			NextKey: []byte("foo"),
+		},
+	})
+
+	bz, err := hex.DecodeString("0a090a036261721202333012050a03666f6f")
+	require.NoError(t, err)
+
+	// first marshal
+	response, err := keeper.ConvertProtoToJSONMarshal(appCodec, protoMarshaler, bz)
+	require.NoError(t, err)
+	require.Equal(t, expected, response)
+
+	// second marshal
+	response, err = keeper.ConvertProtoToJSONMarshal(appCodec, protoMarshaler, bz)
+	require.NoError(t, err)
+	require.Equal(t, expected, response)
+}
+
 // TestDeterministicJsonMarshal tests that we get deterministic JSON marshalled response upon
 // proto struct update in the state machine.
 func TestDeterministicJsonMarshal(t *testing.T) {