v/vlib/json/json_option_test.v

import json

pub struct MyStruct {
pub mut:
	valuea int
}

pub struct MyStruct2 {
pub mut:
	valuea int
	valueb ?MyStruct
}

struct Node {
	location NodeLocation [json: 'loc']
}

struct NodeLocation {
	source_file ?SourceFile [json: 'includedFrom']
}

struct SourceFile {
	path string [json: 'file']
}

fn test_encode_decode() {
	assert json.encode(MyStruct2{ valuea: 1 }) == '{"valuea":1}'

	assert json.decode(MyStruct2, '{"valuea": 1}')! == MyStruct2{
		valuea: 1
		valueb: none
	}
}

fn test_encode_decode2() {
	assert json.encode(MyStruct2{ valuea: 1, valueb: none }) == '{"valuea":1}'

	assert json.decode(MyStruct2, '{"valuea": 1}')! == MyStruct2{
		valuea: 1
		valueb: none
	}
}

fn test_encode_decode3() {
	assert json.encode(MyStruct2{
		valuea: 1
		valueb: MyStruct{
			valuea: 123
		}
	}) == '{"valuea":1,"valueb":{"valuea":123}}'

	assert json.decode(MyStruct2, '{"valuea": 1}')! == MyStruct2{
		valuea: 1
		valueb: none
	}
}

fn test_main() {
	node := json.decode(Node, '{"loc": { "includedFrom": { "file": "/bin/foo" } } }')!

	source_file := node.location.source_file or {
		SourceFile{
			path: '-'
		}
	}

	assert source_file.path == '/bin/foo'
}