MathPHP\NumericalAnalysis\RootFinding\NewtonsMethodTest::testNewtonsMethodExceptionNegativeTolerance PHP Method

    public function testNewtonsMethodExceptionNegativeTolerance()
    {
        $func = function ($x) {
            return $x ** 4 + 8 * $x ** 3 - 13 * $x ** 2 - 92 * $x + 96;
        };
        $args = [-4.1];
        $target = 0;
        $position = 0;
        $tol = -1.0E-5;
        $this->setExpectedException('\\Exception');
        $x = NewtonsMethod::solve($func, $args, $target, $tol, $position);
    }