public async Task RefreshAsync(T instance)
{
if (!await InitializeAsync())
{
throw new MobileServiceInvalidOperationException("Unable to refresh data. Initialization failed.", null, null);
}
await _syncTable.RefreshAsync(instance);
}
public async Task Insert_ThenPush_ThenPull_ThenRead_ThenUpdate_ThenRefresh_ThenDelete_ThenLookup_ThenPush_ThenPurge_ThenRead()
{
ResetDatabase(TestTable);
var hijack = new TestHttpHandler();
hijack.AddResponseContent("{\"id\":\"b\",\"String\":\"Hey\"}"); // insert response
hijack.AddResponseContent("[{\"id\":\"b\",\"String\":\"Hey\"},{\"id\":\"a\",\"String\":\"World\"}]"); // pull response
hijack.AddResponseContent("[]"); // pull last page
IMobileServiceClient service = await CreateTodoClient(hijack);
IMobileServiceSyncTable <ToDoWithStringId> table = service.GetSyncTable <ToDoWithStringId>();
// first insert an item
await table.InsertAsync(new ToDoWithStringId()
{
Id = "b", String = "Hey"
});
// then push it to server
await service.SyncContext.PushAsync();
// then pull changes from server
await table.PullAsync(null, null);
// order the records by id so we can assert them predictably
IList <ToDoWithStringId> items = await table.OrderBy(i => i.Id).ToListAsync();
// we should have 2 records
Assert.Equal(2, items.Count);
// according to ordering a id comes first
Assert.Equal("a", items[0].Id);
Assert.Equal("World", items[0].String);
// then comes b record
Assert.Equal("b", items[1].Id);
Assert.Equal("Hey", items[1].String);
// we made 2 requests, one for push and two for pull
Assert.Equal(3, hijack.Requests.Count);
// recreating the client from state in the store
service = await CreateTodoClient(hijack);
table = service.GetSyncTable <ToDoWithStringId>();
// update the second record
items[1].String = "Hello";
await table.UpdateAsync(items[1]);
// create an empty record with same id as modified record
var second = new ToDoWithStringId()
{
Id = items[1].Id
};
// refresh the empty record
await table.RefreshAsync(second);
// make sure it is same as modified record now
Assert.Equal(second.String, items[1].String);
// now delete the record
await table.DeleteAsync(second);
// now try to get the deleted record
ToDoWithStringId deleted = await table.LookupAsync(second.Id);
// this should be null
Assert.Null(deleted);
// try to get the non-deleted record
ToDoWithStringId first = await table.LookupAsync(items[0].Id);
// this should still be there;
Assert.NotNull(first);
// make sure it is same as
Assert.Equal(first.String, items[0].String);
// recreating the client from state in the store
service = await CreateTodoClient(hijack);
table = service.GetSyncTable <ToDoWithStringId>();
await service.SyncContext.PushAsync();
// now purge the remaining records
await table.PurgeAsync();
// now read one last time
IEnumerable <ToDoWithStringId> remaining = await table.ReadAsync();
// There shouldn't be anything remaining
Assert.Empty(remaining);
}
