public async Task Serialize_AsExpected() { JsonSerializerWrapper jsonSerializerWrapper = new JsonSerializerWrapper(); TaskGroupFactory tasksGroupFactory = new TaskGroupFactory( A.Fake <IIDProducer>(), NullLogger <TaskGroupFactory> .Instance); OperationResult <ITasksGroup> tasksGroupA = tasksGroupFactory.CreateGroup("a group", mTasksGroupProducer); tasksGroupFactory.CreateTask(tasksGroupA.Value, "task 1", mWorkTaskProducer); OperationResult <ITasksGroup> tasksGroupB = tasksGroupFactory.CreateGroup("b group", mTasksGroupProducer); tasksGroupFactory.CreateTask(tasksGroupB.Value, "task 3", mWorkTaskProducer); List <ITasksGroup> entities = new List <ITasksGroup> { tasksGroupA.Value, tasksGroupB.Value }; string tempSerializedFile = Path.GetRandomFileName(); try { await jsonSerializerWrapper.Serialize(entities, tempSerializedFile).ConfigureAwait(false); string text = await File.ReadAllTextAsync(tempSerializedFile).ConfigureAwait(false); Assert.Contains("\"GroupName\": \"a group\"", text); Assert.Contains("\"Description\": \"task 1\"", text); Assert.Contains("\"GroupName\": \"b group\"", text); Assert.Contains("\"Description\": \"task 3\"", text); } finally { File.Delete(tempSerializedFile); } }