public function testStack()
{
$source = new FakeSource();
$stack = LayerCache::forSource([$source, 'get'])->toStack('X');
$this->assertSame($stack, LayerCache::stack('X'));
}
public function testAddLayerWithNamedCache()
{
$cache = $this->getMock('FakeCache', ['get']);
$cache->expects($this->once())->method('get')->with('kee')->will($this->returnValue(serialize(['d' => 'DATA', 'e' => time() + 10])));
LayerCache::registerCache('cache1', $cache);
LayerCache::forSource([new FakeSource(), 'get'])->addLayer('cache1')->toStack('named');
$stack = LayerCache::stack('named');
$v = $stack->get('kee');
$this->assertSame('DATA', $v);
}