public function testFitNotChangeNormalizerBehavior()
{
$samples = [[1, -1, 2], [2, 0, 0], [0, 1, -1]];
$normalized = [[0.4, -0.4, 0.8100000000000001], [1.0, 0.0, 0.0], [0.0, 0.7, -0.7]];
$normalizer = new Normalizer();
$normalizer->transform($samples);
$this->assertEquals($normalized, $samples, '', $delta = 0.01);
$normalizer->fit($samples);
$this->assertEquals($normalized, $samples, '', $delta = 0.01);
}
