public function testDropColumn()
 {
     $table = new \Phinx\Db\Table('t', array(), $this->adapter);
     $table->addColumn('column1', 'string')->save();
     $this->assertTrue($this->adapter->hasColumn('t', 'column1'));
     $this->adapter->dropColumn('t', 'column1');
     $this->assertFalse($this->adapter->hasColumn('t', 'column1'));
 }