public function testGetFlatColumns()
{
$abstractAttrMock = $this->getMock('\\Magento\\Eav\\Model\\Entity\\Attribute\\AbstractAttribute', ['getAttributeCode', '__wakeup'], [], '', false);
$abstractAttrMock->expects($this->any())->method('getAttributeCode')->will($this->returnValue('code'));
$this->product->setAttribute($abstractAttrMock);
$flatColumns = $this->product->getFlatColumns();
$this->assertTrue(is_array($flatColumns), 'FlatColumns must be an array value');
$this->assertTrue(!empty($flatColumns), 'FlatColumns must be not empty');
foreach ($flatColumns as $result) {
$this->assertArrayHasKey('unsigned', $result, 'FlatColumns must have "unsigned" column');
$this->assertArrayHasKey('default', $result, 'FlatColumns must have "default" column');
$this->assertArrayHasKey('extra', $result, 'FlatColumns must have "extra" column');
$this->assertArrayHasKey('type', $result, 'FlatColumns must have "type" column');
$this->assertArrayHasKey('nullable', $result, 'FlatColumns must have "nullable" column');
$this->assertArrayHasKey('comment', $result, 'FlatColumns must have "comment" column');
}
}