Control test apparatus and control test method

A control test apparatus that tests for abnormality of control in a display control apparatus over a display apparatus, the display control apparatus controlling display in the display apparatus,

• the display control apparatus being configured to acquire a first image, and to output, to the display apparatus and the control test apparatus, a second image being the first image that has undergone pre-processing for display in the display apparatus,
• the control test apparatus comprising:
• a processor to execute a program;
• and
• a memory to store the program which, when executed by the processor, performs,
• an acquisition process acquiring, in accordance with a change in the first image, first test data for checking that a third image is input to the display apparatus, the third image being to be acquired from the first image having normally undergone the pre-processing, and
• a control process determining, whenever necessary, on the basis of the second image as input to a controller of the display control apparatus and the first test data as input to the controller, whether the control in the display control apparatus over the display apparatus is abnormal,
• and stopping the determination until a predetermined time elapses from a first time point, the predetermined time being equal to or greater than a time from the first time point at which the first test data is input to the controller to a second time point at which the second image is input to the controller.