public function testGetLabel()
{
$this->assertEmpty($this->_model->getLabel());
$this->_model->setProductAttribute(new \Magento\Framework\Object(['store_label' => 'Store Label']));
$this->assertEquals('Store Label', $this->_model->getLabel());
$this->_model->setUseDefault(1)->setProductAttribute(new \Magento\Framework\Object(['store_label' => 'Other Label']));
$this->assertEquals('Other Label', $this->_model->getLabel());
}