Backlink tests (wip)

.vscode/settings.json

@@ -8,6 +8,7 @@
  "dart.lineLength": 160,
  "cSpell.words": [
  "apikeys",
+ "backlinks",
  "BEGINSWITH",
  "bson",
  "deallocated",

test/backlinks_test.dart

@@ -0,0 +1,98 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2022 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+import 'package:realm_common/realm_common.dart';
+import 'package:test/expect.dart';
+
+import '../lib/realm.dart';
+import 'test.dart';
+
+part 'backlinks_test.g.dart';
+
+@RealmModel()
+class _Source {
+ String name = 'source';
+ _Target? oneTarget;
+ List<_Target> manyTargets = [];
+}
+
+@RealmModel()
+class _Target {
+ @Backlink(#oneTarget)
+ late Iterable<_Source> oneToMany; // computed property, so must go last in generated class!
+
+ String name = 'target';
+
+ @Backlink(#manyTargets)
+ late Iterable<_Source> manyToMany; // computed property, so must go last in generated class!
+}
+
+Future<void> main([List<String>? args]) async {
+ await setupTests(args);
+
+ test('Backlinks 1-1(ish)', () {
+ final config = Configuration.local([Target.schema, Source.schema]);
+ final realm = getRealm(config);
+
+ final target = Target();
+ final source = realm.write(() => realm.add(Source(oneTarget: target)));
+
+ expect(source.oneTarget, target);
+ expect(target.oneToMany, [source]);
+ });
+
+ test('Backlinks 1-many', () {
+ final config = Configuration.local([Target.schema, Source.schema]);
+ final realm = getRealm(config);
+
+ final target = Target();
+ final sources = List.generate(100, (i) => Source(oneTarget: target, name: '$i'));
+ realm.write(() => realm.addAll(sources));
+
+ expect(target.oneToMany, sources);
+ });
+
+ test('Backlinks many-many', () {
+ final config = Configuration.local([Target.schema, Source.schema]);
+ final realm = getRealm(config);
+
+ final targets = List.generate(100, (i) => Target(name: '$i'));
+ final sources = List.generate(100, (i) => Source(manyTargets: targets));
+
+ realm.write(() => realm.addAll(sources));
+
+ for (final t in targets) {
+ expect(t.manyToMany, sources);
+ }
+
+ for (final s in sources) {
+ expect(s.manyTargets, targets);
+ }
+ });
+
+ test('Backlinks query', () {
+ final config = Configuration.local([Target.schema, Source.schema]);
+ final realm = getRealm(config);
+
+ final target = Target();
+ final sources = List.generate(100, (i) => Source(oneTarget: target, name: '$i'));
+ realm.write(() => realm.addAll(sources));
+
+ expect(target.oneToMany.query(r'name = $0', ['42']), realm.query<Source>(r'name == $0', ['42']));
+ });
+}