Add meta parameter for createResourceAt() (#106)

Author: dan12411

lib/src/client/json_api_client.dart

@@ -66,8 +66,8 @@ class JsonApiClient {
   ///
   /// https://jsonapi.org/format/#crud-creating
   Future<Response<ResourceData>> createResourceAt(Uri uri, Resource resource,
-          {Map<String, String> headers}) =>
-      _call(_post(uri, headers, _resourceDoc(resource)), ResourceData.fromJson);
+          {Map<String, String> headers, Map<String, Object> meta}) =>
+      _call(_post(uri, headers, _resourceDoc(resource, meta: meta)), ResourceData.fromJson);
 
   /// Deletes the resource.
   ///
@@ -127,8 +127,8 @@ class JsonApiClient {
 
   final _api = Api(version: '1.0');
 
-  Document<ResourceData> _resourceDoc(Resource resource) =>
-      Document(ResourceData.fromResource(resource), api: _api);
+  Document<ResourceData> _resourceDoc(Resource resource, {Map<String, Object> meta}) =>
+      Document(ResourceData.fromResource(resource), meta: meta, api: _api);
 
   Document<ToMany> _toManyDoc(Iterable<Identifier> identifiers) =>
       Document(ToMany.fromIdentifiers(identifiers), api: _api);

test/unit/client/creating_resource_with_meta_test.dart

@@ -0,0 +1,25 @@
+import 'package:json_api/client.dart';
+import 'package:json_api/document.dart';
+import 'package:json_api/http.dart';
+import 'package:test/test.dart';
+
+import '../../helper/test_http_handler.dart';
+
+void main() async {
+  test('request actually has the meta property', () async {
+    final handler = TestHttpHandler();
+    final client = JsonApiClient(handler);
+
+    final uri = Uri.parse('https://github.com/f3ath/json-api-dart');
+    final person =
+        Resource('people', '123', attributes: {'name': 'Te Cheng Hung'});
+    final meta = {'friend': 'Martin Fowler'};
+
+    handler.nextResponse = HttpResponse(201);
+    await client.createResourceAt(uri, person, meta: meta);
+
+    final request = handler.requestLog.first;
+    expect(request.body,
+        '{"data":{"type":"people","id":"123","attributes":{"name":"Te Cheng Hung"}},"meta":{"friend":"Martin Fowler"}}');
+  });
+}