import json import x.json2 struct Foo { name string num ?int } fn test_json_encode_struct_with_option_field() { f1 := Foo{ name: 'hello' } ret1 := json.encode(f1) println(ret1) assert ret1 == '{"name":"hello"}' ret2 := json2.encode(f1) println(ret2) assert ret2 == '{"name":"hello"}' f2 := Foo{'hello', 22} ret3 := json.encode(f2) println(ret3) assert ret3 == '{"name":"hello","num":22}' ret4 := json2.encode(f2) println(ret4) assert ret4 == '{"name":"hello","num":22}' }