when should the developer test cases be written
Test-driven development In test-driven development, each new feature begins with writing a test. Write a test that defines a function or improvements of a function, which should be very succinct. To write a test, the developer must clearly understand the feature's specification and requirements. The developer can accomplish this through use cases and user stories to cover the requirements and exception conditions, and can write the test in whatever testing framework is appropriate to the software environment. It could be a modified version of an existing test. This is a differentiating feature of test-driven development versus writing unit tests after the code is written: it makes the developer focus on the requirements before writing the code, a subtle but important difference.
National Car Test The National Car Test (the NCT) was introduced in 2000, since when all cars four years and older must undergo an NCT. The NCT due date is calculated by reference to the date of first registration of the car, with tests due every two years for cars younger than 10 years. Annual Testing was introduced in June 2011 and is now a legal requirement for vehicles that present for their 10th anniversary test and each subsequent test. Vehicles can be inspected up to 90 days in advance of the anniversary of the registration date. The waiting lists have proven to be long, with the 'priority list' taking in excess of a month.