quadratic_equation_test.hhs

/**
 * @author Jianan Lin
 * Unit test for quadratic_equation function
 */


function quadratic_equation_test() {

    *import math: quadratic_equation
    
    // x - 1 = 0
    if (!(quadratic_equation(0, 1, -1) === [1, 1])) {
        throw new Error('Unit test for quadratic_equation failed');
    }

    // x^2 - 2x + 1 = 0
    if (!(quadratic_equation(1, -2, 1) === [1, 1])) {
        throw new Error('Unit test for quadratic_equation failed');
    }

    // x^2 - 3x + 2 = 0
    if (!(quadratic_equation(1, -3, 2) === [1, 2])) {
        throw new Error('Unit test for quadratic_equation failed');
    }

    // x^2 + x + 1 = 0, false
    // we can not test this because NaN === NaN returns false
    // but the answer is right [NaN, NaN]
    // if (!(quadratic_equation(1, 1, 1, false)[0] === NaN)) {
    //     throw new Error('Unit test for quadratic_equation failed');
    // }

    // x^2 + 2x + 2 = 0, true
    // we can not test this because complex === complex returns false
    // but the answer is right [-1 - i, -1 + i]
    // if (!(quadratic_equation(1, 2, 2, true) === [mathjs.complex(-1, -1), mathjs.complex(-1, 1)])) {
    //     throw new Error('Unit test for quadratic_equation failed');
    // }

    //print("quadratic_equation test pass");

}