 
 <prompt> Wetin be US spelling of one popular color? Based on di question wey dey above, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: Grey-box testing (American spelling: gray-box testing) involve say make person sabi internal data structures and algorithms for purposes of designing tests, while executing those tests at the user, or black-box level. The tester no need to get full access to the software's source code.[not in citation given] Manipulating input data and formatting output no qualify as grey-box, because the input and output dey clearly outside of the "black box" wey we dey call the system under test. This distinction dey particularly important when conducting integration testing between two modules of code wey two different developers write, where only the interfaces dey exposed for test. 