VI. No unit tests

Driving without headlights

In modern day it’s almost unacceptable to deliver code in any form or shape without testing it. A concept called Test-driven development (TDD) has been born to accommodate the inclusion of tests into requirements and effectively baking these into the process of producing testable code.

Let’s first look at this code example below, a simple method returns some sort of calculation result – in this instance calculating postage cost.

public class ShoppingCart
{
    public double CalculatePostageCost(int zone, double distance)
    {
        return zone * distance;
    }
}

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