EazyMockMockAPIGuidearchitecturehex-archgosystem-designNextFeatureBlogsAIMasteringFPMonadsFunctionalCSSFEanimationGoProgrammingTanstackReactprinciplespatternsProgramingRecursionFunctionalTestSmokeTestUnitTestSystemTestSanityTestAPITEQNOLOGICALEAZYMOCK