var a, b, c, d, col, additions, removals, changes, likechanges, readShard, unreadShard;
module('Backbone.Shard', {
    setup: function() {
        a = new Backbone.Model({data: 'a', read: true, like: false});
        b = new Backbone.Model({data: 'b', read: true, like: false});
        c = new Backbone.Model({data: 'c', read: false, like: false});
        d = new Backbone.Model({data: 'd', read: false, like: false});
        col = new Backbone.Collection([a, b, c, d]);
        readShard = new Backbone.Shard({
            collection: col,
            filter: function(model) { return model.get('read'); }
        });
        unreadShard = new Backbone.Shard({
            collection: col,
            filter: function(model) { return !model.get('read'); }
        });
        additions = {read: 0, unread: 0};
        removals = {read: 0, unread: 0};
        changes = {read: 0, unread: 0};
        likechanges = {read: 0, unread: 0};
        readShard.on('add', function() {
            additions.read++;
        }).on('remove', function() {
            removals.read++;
        }).on('change', function() {
            changes.read++;
        }).on('change:like', function() {
            likechanges.read++;
        });
        unreadShard.on('add', function() {
            additions.unread++;
        }).on('remove', function() {
            removals.unread++;
        }).on('change', function() {
            changes.unread++;
        }).on('change:like', function() {
            likechanges.unread++;
        });
    }
});
test('Updating model attributes not used in shard filter', function() {
    a.set('like', true);
    equal(likechanges.read, 1, 'change:like triggered in readShard');
    equal(likechanges.unread, 0, 'change:like not triggered in unreadShard');
});
test('Updating model attributes used in shard filter', function() {
    a.set('read', false);
    deepEqual(readShard.size(), 1, 'removes from readShard');
    equal(removals.read, 1, '... and triggers remove event');
    equal(unreadShard.size(), 3, 'adds to unreadShard');
    equal(additions.unread, 1, '... and triggers add event');
});