@Test public void testQuadraticFunction() { QNMinimizer minimizer = new QNMinimizer(); Function f = new QuadraticFunction(); double[] x = minimizer.minimize(f); double minValue = f.valueAt(x); Assert.assertEquals(x[0], 1.0, 1e-5); Assert.assertEquals(x[1], 5.0, 1e-5); Assert.assertEquals(minValue, 10.0, 1e-10); }