 
 <prompt> One month dey consist of an average of 30.42 wetin? Given di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: The practice of component interface testing fit use check how data dey waka between different units, or subsystem components, pass integration testing between those units. The data wey dey pass fit be like "message packets" and dem fit check the range and data types, for data wey one unit generate, and test am if e dey valid before e go enter another unit. One option for interface testing na to keep separate log file of data items wey dey pass, often with timestamp wey dey logged to allow analysis of thousands of cases of data wey dey pass between units for days or weeks. Tests fit include checking how some extreme data values dey behave while other interface variables dey pass as normal values. Unusual data values for interface fit help explain unexpected performance for the next unit. Component interface testing na one kind black-box testing, with focus on the data values pass just the related actions of a subsystem component. 