public function testToOptionArray()
{
$expect = [['label' => __('-- Please Select a Category --'), 'value' => ''], ['label' => 'name', 'value' => 3]];
$this->categoryCollection->expects($this->once())->method('addAttributeToSelect')->with($this->equalTo('name'))->will($this->returnValue($this->categoryCollection));
$this->categoryCollection->expects($this->once())->method('addRootLevelFilter')->will($this->returnValue($this->categoryCollection));
$this->categoryCollection->expects($this->once())->method('load');
$this->categoryCollection->expects($this->any())->method('getIterator')->will($this->returnValue(new \ArrayIterator([$this->category])));
$this->category->expects($this->once())->method('getName')->will($this->returnValue('name'));
$this->category->expects($this->once())->method('getId')->will($this->returnValue(3));
$this->assertEquals($expect, $this->model->toOptionArray());
}