public function testConverged()
{
$mock = $this->getMockBuilder(StoppingCriteria::class)->setMethods(['converged'])->getMock();
$mock->method('converged')->willReturn(true);
$criteria = new NthIteration($mock, 3);
static::assertFalse($criteria->converged([], []));
static::assertFalse($criteria->converged([], []));
static::assertTrue($criteria->converged([], []));
static::assertFalse($criteria->converged([], []));
static::assertFalse($criteria->converged([], []));
static::assertTrue($criteria->converged([], []));
}