public function testIsIndex()
 {
     $table = new Table();
     $column1 = new Column('category_id');
     $column2 = new Column('type');
     $table->addColumn($column1);
     $table->addColumn($column2);
     $index = new Index('test_index');
     $index->setColumns([$column1, $column2]);
     $table->addIndex($index);
     $this->assertTrue($table->isIndex(['category_id', 'type']));
     $this->assertTrue($table->isIndex(['type', 'category_id']));
     $this->assertFalse($table->isIndex(['category_id', 'type2']));
     $this->assertFalse($table->isIndex(['asd']));
 }