public function testDropColumn()
 {
     $blueprint = new Blueprint('users');
     $blueprint->dropColumn('foo');
     $statements = $blueprint->toSql($this->getConnection(), $this->getGrammar());
     $this->assertEquals(1, count($statements));
     $this->assertEquals('alter table users drop ( foo )', $statements[0]);
     $blueprint = new Blueprint('users');
     $blueprint->dropColumn(['foo', 'bar']);
     $statements = $blueprint->toSql($this->getConnection(), $this->getGrammar());
     $this->assertEquals(1, count($statements));
     $this->assertEquals('alter table users drop ( foo, bar )', $statements[0]);
 }