ReactEazyMockMockAPIGuidearchitecturehex-archgosystem-designNextFeatureBlogsAIMasteringFPMonadsFunctionalCSSFEanimationGoProgrammingTanstackprinciplespatternsProgramingRecursionFunctionalTestSmokeTestUnitTestSystemTestSanityTestAPITEQNOLOGICALEAZYMOCK