Example of testing composition of multiply and divide with Quickspec

quickspec-multiplyThenDivide.js

describe('runMultiplyThenDivide', function() {
    
    it('should properly evaluate the composition of multiply and divide', function () {
        const specSet = [
            {
                name: 'Zero-multiplication',
                setupValues: { a: 0, b: 1, c: 2 },
                expectedValue: 0
            },
            {
                name: 'Multiplicative identity',
                setupValues: { a: 1, b: 5, c: 2 },
                expectedValue: 2.5
            },
            {
                name: 'Multiplying positive numbers',
                setupValues: { a: 6, b: 7, c: 3 },
                expectedValue: 14
            },
            {
                name: 'Multiplying 1 positive, 1 negative number',
                setupValues: { a: -3, b: 4, c: 6 },
                expectedValue: -2
            },
            {
                name: 'Multiplying two negative numbers',
                setupValues: { a: -5, b: -6, c: 3 },
                expectedValue: 10
            }
        ];

        const runMultiplyThenDivide = ({ a, b }, verify) => verify(multiplyThenDivide(a, b));
        
        quickSpec
            .verify(runMultiplyThenDivide)
            .over(specSet);
    });

});