A developer has implemented a class that calculates if a given date is a leap year. The definition
for the leap year is given:
Every year that is exactly divisible by four is a leap year, except for years that are exactly
divisible by 100, but these centurial years are leap years if they are exactly divisible by 400.
- divisible by 4
- but not by 100
- years divisible by 400 are leap anyway
You have already thought about it and started with the first test class; the test class looks like
(pseudo JavaScript used here):
// LeapYear.spec.js
describe('Leap year calculator', () => {
it('should consider 1996 as leap', () => {
expect(LeapYear.isLeap(1996)).toBe(true);
});
});
What would now be your next step to proceed as efficient as possible, to validate the correctness
of the class above?
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Correct Answer:
D
In the context of test-driven development (TDD), the next step after writing a failing test is to write the minimum amount of code necessary to make the test pass. This approach encourages simple designs and inspires confidence that the system is functioning as expected. Once the test passes, you can then refactor the code to improve its structure without changing its behavior.
