blob: 777854d6132d94108b4eef8b0fd86ed72b4f485a [file] [log] [blame]
* 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"}');