CodeWarsTesting A simple application for getting to know XCTest Task: It is necessary to solve the problem(https://www.codewars.com/kata/57ea70aa5500adfe8a000110/swift) and cover it with unit, integration, e2e tests Unit tests are located in the file "CodeWarsTestingTests/CodeWarsUnitTests": testWhenInputIsEmptyArray testWhenInputIsNegativeAndPositiveNumbers testWhenInputIsTimesEqualZero testWhenInputArrayModified Integration tests are located in the file "CodeWarsTestingTests/CoreDataIntegrationTests": CoreDataTestStack is a class for secure testing of CoreData. Allows you to separate real data in the database and data for testing. testWhenCreateEntityResult testWhenUpdateEntityResult testtestWhenDeleteLastEntityResult E2e tests are located in the file "CodeWarsTestingUITests/CodeWarsTestingUITests": testButtonGo