public function testStaticMethodCodes()
 {
     $buffer = Buffer::hex('0001020300010203000102030001020300010203000102030001020300010203');
     $block = Inventory::block($buffer);
     $tx = Inventory::tx($buffer);
     $filtered = Inventory::filteredBlock($buffer);
     $this->assertEquals(Inventory::MSG_BLOCK, $block->getType());
     $this->assertEquals(Inventory::MSG_TX, $tx->getType());
     $this->assertEquals(Inventory::MSG_FILTERED_BLOCK, $filtered->getType());
 }