Patent ID: 9660894
Date: 2017-05-23
CPC Classifications: H04L

Claim:
1. A network test device for testing operation of a gateway device connecting a first network and a second network, this network test device comprising: a central processing unit (CPU) executing programs stored in a memory to provide: a first electronic message receiver that be connected to the first network for receiving electronic messages traveling on the first network; a second electronic message receiver that be connected to the second network for receiving electronic messages traveling on the second network; a received electronic message storage that stores electronic messages respectively received by the first electronic message receiver and the second electronic message receiver; a mapping information creator that estimates the correlation between input electronic messages input into the gateway device from the first network and output electronic messages output on the second network from the gateway device, based on multiple electronic messages stored in the received electronic message storage and creates mapping information consisting of information obtained as a result of estimation; an object information database in which properties and property values are correlated in levels for all or a portion of the objects managed by the gateway device; a test electronic message creator that creates an input electronic message for test based on the mapping information and the object information database; an electronic message sender that outputs the input electronic message for test to the first network; and a test result determiner that determines whether or not the test result is normal by determining whether or not the relationship between an input electronic message and one or multiple output electronic messages is correct with reference to the mapping information after output of the input electronic message for test by the electronic message sender.