public function testSetLabelPreference()
{
$this->assertFalse($this->object->setLabelPreference(null));
//can't be nothing
$this->assertFalse($this->object->setLabelPreference(5));
//can't be an int
$this->assertFalse($this->object->setLabelPreference('wrong'));
//not a valid value
$this->assertNull($this->object->setLabelPreference('SELLER_LABEL'));
$this->assertNull($this->object->setLabelPreference('AMAZON_LABEL_ONLY'));
$this->assertNull($this->object->setLabelPreference('AMAZON_LABEL_PREFERRED'));
$o = $this->object->getOptions();
$this->assertArrayHasKey('LabelPrepPreference', $o);
$this->assertEquals('AMAZON_LABEL_PREFERRED', $o['LabelPrepPreference']);
}
