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// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// @assertion JsonUtf8Encoder([
/// String indent,
/// dynamic toEncodable(
/// object
/// ),
/// int bufferSize = DEFAULT_BUFFER_SIZE
/// ])
/// Create converter.
/// If indent is non-null, the converter attempts to "pretty-print" the JSON,
/// and uses indent as the indentation. Otherwise the result has no whitespace
/// outside of string literals. If indent contains characters that are not valid
/// JSON whitespace characters, the result will not be valid JSON. JSON
/// whitespace characters are space (U+0020), tab (U+0009), line feed (U+000a)
/// and carriage return (U+000d) (ECMA 404).
/// The bufferSize is the size of the internal buffers used to collect UTF-8 code
/// units. If using startChunkedConversion, it will be the size of the chunks.
/// The JSON encoder handles numbers, strings, booleans, null, lists and maps
/// directly.
/// Any other object is attempted converted by toEncodable to an object that is
/// of one of the convertible types.
/// If toEncodable is omitted, it defaults to calling .toJson() on the object.
/// @description Checks that this constructor, called with toEncodable parameter,
/// creates object with specified toEncodable
/// @author
import "dart:convert";
import "../../../Utils/expect.dart";
class A {
Object toJson() => 42;
class C {
String toJson() => "C: this is JSON";
dynamic toEncodable(object) {
if (object is A) {
return "A encoded by toEncodable";
if (object is C) {
return "C encoded by toEncodable";
return "Another encoded by toEncodable";
check(JsonUtf8Encoder encoder, var object, var expected) {
List<int> encoded = encoder.convert(object);
Expect.listEquals(utf8.encode(expected), encoded);
main() {
JsonUtf8Encoder encoder = new JsonUtf8Encoder(null, toEncodable);
check(encoder, 1, "1");
check(encoder, 3.14, "3.14");
check(encoder, null, "null");
check(encoder, "str", '"str"');
check(encoder, true, 'true');
check(encoder, false, 'false');
check(encoder, [1, 2, 3], "[1,2,3]");
check(encoder, {"a": "b"}, '{"a":"b"}');
check(encoder, {" й ": " ф "}, '{" й ":" ф "}');
check(encoder, new A(), '"A encoded by toEncodable"');
check(encoder, new C(), '"C encoded by toEncodable"');
check(encoder, [new C(), new A()],
'["C encoded by toEncodable","A encoded by toEncodable"]');
// Map with not a string keys
encoder, {new C(): new A()}, '"Another encoded by toEncodable"');
// Map with a string keys
check(encoder, {"x": new A()}, '{"x":"A encoded by toEncodable"}');