public function testGetFlatColums()
{
$abstractAttributeMock = $this->getMock('\\Magento\\Eav\\Model\\Entity\\Attribute\\AbstractAttribute', array('getAttributeCode', '__wakeup'), array(), '', false);
$abstractAttributeMock->expects($this->any())->method('getAttributeCode')->will($this->returnValue('code'));
$this->_model->setAttribute($abstractAttributeMock);
$flatColums = $this->_model->getFlatColums();
$this->assertTrue(is_array($flatColums), 'FlatColums must be an array value');
$this->assertTrue(!empty($flatColums), 'FlatColums must be not empty');
foreach ($flatColums as $result) {
$this->assertArrayHasKey('unsigned', $result, 'FlatColums must have "unsigned" column');
$this->assertArrayHasKey('default', $result, 'FlatColums must have "default" column');
$this->assertArrayHasKey('extra', $result, 'FlatColums must have "extra" column');
$this->assertArrayHasKey('type', $result, 'FlatColums must have "type" column');
$this->assertArrayHasKey('nullable', $result, 'FlatColums must have "nullable" column');
$this->assertArrayHasKey('comment', $result, 'FlatColums must have "comment" column');
}
}