public function testGet()
{
$data = ['a' => 'b'];
$cacheid = 'test';
$this->cache->expects($this->once())->method('load')->will($this->returnValue(false));
$this->reader->expects($this->once())->method('read')->will($this->returnValue($data));
$config = new \Magento\Framework\Config\Data($this->reader, $this->cache, $cacheid);
$this->assertEquals($data, $config->get());
$this->assertEquals('b', $config->get('a'));
$this->assertEquals(null, $config->get('a/b'));
$this->assertEquals(33, $config->get('a/b', 33));
}
