This suite tests the current code in the Calculator. Any tests that fail will be in red text with a red x and tests that pass will have a green check mark. You can click on the text for any case to see what test code is being run. The code can be read in rough English to understand what is being tested.
Addend + Addend = Sum
Minuend - Subtrahend = Difference
Multiplicand * Multiplier = Product
Dividend / Divisor = quotient