Added first test for firestore provider

test/src/resources/firestore_provider_test.dart

@@ -0,0 +1,78 @@
+import 'dart:async';
+
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:do_more/src/models/event_model.dart';
+import 'package:do_more/src/models/task_model.dart';
+import 'package:do_more/src/resources/firestore_provider.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mockito/mockito.dart';
+import 'package:rxdart/rxdart.dart';
+
+class MockFirestore extends Mock implements Firestore {}
+
+class MockCollectionReference extends Mock implements CollectionReference {}
+
+class MockDocumentReference extends Mock implements DocumentReference {}
+
+class MockDocumentSnapshot extends Mock implements DocumentSnapshot {
+  final Map<String, dynamic> data;
+
+  MockDocumentSnapshot([this.data]);
+
+  dynamic operator [](String key) => data[key];
+}
+
+class MockQuerySnapshot extends Mock implements QuerySnapshot {}
+
+main() {
+  final task = TaskModel(
+    id: '1',
+    text: 'A task',
+    done: false,
+    ownerUsername: 'testUser',
+    event: 'testEvent',
+    priority: 1,
+  );
+
+  final event = EventModel(
+    id: '1',
+    name: 'An event',
+    pendigTasks: 0,
+    media: <String>[],
+    tasks: <String>[],
+    when: <bool>[],
+    highPriority: 0,
+    mediumPriority: 0,
+    lowPriority: 0,
+  );
+
+  group('FirestoreProvider', () {
+    test('should send task to firestore', () {
+      final firestore = MockFirestore();
+      final collection = MockCollectionReference();
+      final provider = FirestoreProvider(firestore);
+
+      when(firestore.collection('tasks')).thenReturn(collection);
+
+      provider.addTask(task);
+
+      verify(collection.add(task.toFirestoreMap()));
+    });
+
+    test('should listen for updates to a single Task', () {
+      final firestore = MockFirestore();
+      final collection = MockCollectionReference();
+      final snapshot = MockDocumentSnapshot(task.toFirestoreMap());
+      final snapshots = Stream.fromIterable([snapshot]);
+      final document = MockDocumentReference();
+      final provider = FirestoreProvider(firestore);
+
+      when(firestore.collection('tasks')).thenReturn(collection);
+      when(collection.document(task.id)).thenReturn(document);
+      when(document.snapshots()).thenAnswer((_) => snapshots);
+      when(snapshot.documentID).thenReturn(task.id);
+
+      expectLater(provider.getTask('1'), emits(task));
+    });
+  });
+}