php-ml/tests/Phpml/Classification/NaiveBayesTest.php

72 lines
2.3 KiB
PHP
Raw Normal View History

2016-04-14 20:56:54 +00:00
<?php
2016-11-20 21:53:17 +00:00
declare(strict_types=1);
2016-04-14 20:56:54 +00:00
namespace Phpml\Tests\Classification;
2016-04-14 20:56:54 +00:00
use Phpml\Classification\NaiveBayes;
use Phpml\ModelManager;
2017-02-03 11:58:25 +00:00
use PHPUnit\Framework\TestCase;
2016-04-14 20:56:54 +00:00
2017-02-03 11:58:25 +00:00
class NaiveBayesTest extends TestCase
2016-04-14 20:56:54 +00:00
{
public function testPredictSingleSample(): void
2016-04-14 20:56:54 +00:00
{
$samples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]];
$labels = ['a', 'b', 'c'];
$classifier = new NaiveBayes();
$classifier->train($samples, $labels);
$this->assertEquals('a', $classifier->predict([3, 1, 1]));
$this->assertEquals('b', $classifier->predict([1, 4, 1]));
$this->assertEquals('c', $classifier->predict([1, 1, 6]));
}
public function testPredictArrayOfSamples(): void
2016-04-14 20:56:54 +00:00
{
$trainSamples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]];
$trainLabels = ['a', 'b', 'c'];
$testSamples = [[3, 1, 1], [5, 1, 1], [4, 3, 8], [1, 1, 2], [2, 3, 2], [1, 2, 1], [9, 5, 1], [3, 1, 2]];
$testLabels = ['a', 'a', 'c', 'c', 'b', 'b', 'a', 'a'];
$classifier = new NaiveBayes();
$classifier->train($trainSamples, $trainLabels);
$predicted = $classifier->predict($testSamples);
$this->assertEquals($testLabels, $predicted);
// Feed an extra set of training data.
$samples = [[1, 1, 6]];
$labels = ['d'];
$classifier->train($samples, $labels);
$testSamples = [[1, 1, 6], [5, 1, 1]];
$testLabels = ['d', 'a'];
$this->assertEquals($testLabels, $classifier->predict($testSamples));
2016-04-14 20:56:54 +00:00
}
public function testSaveAndRestore(): void
{
$trainSamples = [[5, 1, 1], [1, 5, 1], [1, 1, 5]];
$trainLabels = ['a', 'b', 'c'];
$testSamples = [[3, 1, 1], [5, 1, 1], [4, 3, 8]];
$testLabels = ['a', 'a', 'c'];
$classifier = new NaiveBayes();
$classifier->train($trainSamples, $trainLabels);
$predicted = $classifier->predict($testSamples);
$filename = 'naive-bayes-test-'.random_int(100, 999).'-'.uniqid();
$filepath = tempnam(sys_get_temp_dir(), $filename);
$modelManager = new ModelManager();
$modelManager->saveToFile($classifier, $filepath);
$restoredClassifier = $modelManager->restoreFromFile($filepath);
$this->assertEquals($classifier, $restoredClassifier);
$this->assertEquals($predicted, $restoredClassifier->predict($testSamples));
}
2016-04-14 20:56:54 +00:00
}