mathsteps/test/checks/isQuadratic.test.js

Step by step math solutions

const checks = require('../../lib/checks');
const TestUtil = require('../TestUtil');

function testIsQuadratic(input, output) {
  TestUtil.testBooleanFunction(checks.isQuadratic, input, output);
}

describe('isQuadratic', function () {
  const tests = [
    ['2 + 2', false],
    ['x', false],
    ['x^2 - 4', true],
    ['x^2 + 2x + 1', true],
    ['x^2 - 2x + 1', true],
    ['x^2 + 3x + 2', true],
    ['x^2 - 3x + 2', true],
    ['x^2 + x - 2', true],
    ['x^2 + x', true],
    ['x^2 + 4', true],
    ['x^2 + 4x + 1', true],
    ['x^2', false],
    ['x^3 + x^2 + x + 1', false],
    ['x^2 + 4 + 2^x', false],
    ['x^2 + 4 + 2y', false],
    ['y^2 + 4 + 2x', false],
  ];
  tests.forEach(t => testIsQuadratic(t[0], t[1]));
});