| /* |
| * 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. |
| */ |
| /** |
| * @assertionconst JsonEncoder.withIndent( |
| * String indent, [ |
| * dynamic toEncodable( |
| * nonSerializable |
| * ) |
| * ]) |
| * Creates a JSON encoder that creates multi-line JSON. |
| * The encoding of elements of lists and maps are indented and put on separate |
| * lines. The indent string is prepended to these elements, once for each level |
| * of indentation. |
| * |
| * If indent is null, the output is encoded as a single line. |
| * |
| * 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 not null indent |
| * parameter and toEncodable creates a JSON encoder that creates multi-line |
| * JSON. |
| * @author sgrekhov@unipro.ru |
| */ |
| 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(JsonEncoder encoder, var object, var expected) { |
| String encoded = encoder.convert(object); |
| Expect.equals(expected, encoded); |
| } |
| |
| main() { |
| JsonEncoder encoder = new JsonEncoder.withIndent("--", toEncodable); |
| |
| check(encoder, new A(), '"A encoded by toEncodable"'); |
| check(encoder, new C(), '"C encoded by 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], "[\n--1,\n--2,\n--3\n]"); |
| check(encoder, {"a": "b"}, '{\n--"a": "b"\n}'); |
| } |