public function testGetLinkedProducts()
{
$typeInstance = $this->getMock('\\Magento\\GroupedProduct\\Model\\Product\\Type\\Grouped', [], [], '', false);
$product = $this->getMock('\\Magento\\Catalog\\Model\\Product', [], [], '', false);
$expected = [$product];
$product->expects($this->once())->method('getTypeInstance')->will($this->returnValue($typeInstance));
$typeInstance->expects($this->once())->method('getAssociatedProducts')->with($product)->will($this->returnValue($expected));
$model = new Grouped();
$this->assertEquals($expected, $model->getLinkedProducts($product));
}
