[Client] Add canonical json

pubspec.lock

@@ -85,6 +85,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.6.0"
+  canonical_json:
+    dependency: "direct main"
+    description:
+      name: canonical_json
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   charcode:
     dependency: transitive
     description:
@@ -449,6 +456,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.6"
+  unorm_dart:
+    dependency: transitive
+    description:
+      name: unorm_dart
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.2"
   vm_service:
     dependency: transitive
     description:

pubspec.yaml

@@ -10,6 +10,7 @@ environment:
 dependencies:
   http: ^0.12.0+2
   mime_type: ^0.2.4
+  canonical_json: ^1.0.0
 
 dev_dependencies:
   test: ^1.0.0

test/canonical_json_test.dart

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2019 Zender & Kurtz GbR.
+ *
+ * Authors:
+ *   Christian Pauly <krille@famedly.com>
+ *   Marcel Radzio <mtrnord@famedly.com>
+ *
+ * This file is part of famedlysdk.
+ *
+ * famedlysdk is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * famedlysdk is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with famedlysdk.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import 'package:canonical_json/canonical_json.dart';
+import 'package:test/test.dart';
+
+void main() {
+  /// All Tests related to the ChatTime
+  group("Canonical Json", () {
+    Map<String, Map<String, dynamic>> textMap = {
+      '{}': {},
+      '{"one":1,"two":"Two"}': {"one": 1, "two": "Two"},
+      '{"a":"1","b":"2"}': {"b": "2", "a": "1"},
+      '{"auth":{"mxid":"@john.doe:example.com","profile":{"display_name":"John Doe","three_pids":[{"address":"john.doe@example.org","medium":"email"},{"address":"123456789","medium":"msisdn"}]},"success":true}}':
+          {
+        "auth": {
+          "success": true,
+          "mxid": "@john.doe:example.com",
+          "profile": {
+            "display_name": "John Doe",
+            "three_pids": [
+              {"medium": "email", "address": "john.doe@example.org"},
+              {"medium": "msisdn", "address": "123456789"}
+            ]
+          }
+        }
+      },
+      '{"a":null}': {"a": null},
+    };
+    for (final entry in textMap.entries) {
+      test(entry.key, () async {
+        expect(
+            entry.key, String.fromCharCodes(canonicalJson.encode(entry.value)));
+      });
+    }
+  });
+}