Test-driven iOS application developmentFrom the initial requirement definition to a fully operational state, the test-driven development methodology explains the process of creating a step-by-step iOS app with a basic understanding of test-driven development. Describe how to apply test-driven development methodologies to existing projects that have no test, which is a concern of the team that is developing after completing the app completion phase, how to design them for the test-driven methodology, and how to create the tests automatically .