95 lines
3.4 KiB
PHP
95 lines
3.4 KiB
PHP
<?php
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declare(strict_types=1);
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namespace tests\Phpml\CrossValidation;
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use Phpml\CrossValidation\RandomSplit;
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use Phpml\Dataset\ArrayDataset;
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class RandomSplitTest extends \PHPUnit_Framework_TestCase
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{
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/**
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* @expectedException \Phpml\Exception\InvalidArgumentException
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*/
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public function testThrowExceptionOnToSmallTestSize()
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{
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new RandomSplit(new ArrayDataset([], []), 0);
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}
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/**
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* @expectedException \Phpml\Exception\InvalidArgumentException
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*/
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public function testThrowExceptionOnToBigTestSize()
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{
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new RandomSplit(new ArrayDataset([], []), 1);
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}
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public function testDatasetRandomSplitWithoutSeed()
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{
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$dataset = new ArrayDataset(
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$samples = [[1], [2], [3], [4]],
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$labels = ['a', 'a', 'b', 'b']
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);
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$randomSplit = new RandomSplit($dataset, 0.5);
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$this->assertEquals(2, count($randomSplit->getTestSamples()));
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$this->assertEquals(2, count($randomSplit->getTrainSamples()));
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$randomSplit2 = new RandomSplit($dataset, 0.25);
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$this->assertEquals(1, count($randomSplit2->getTestSamples()));
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$this->assertEquals(3, count($randomSplit2->getTrainSamples()));
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}
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public function testDatasetRandomSplitWithSameSeed()
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{
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$dataset = new ArrayDataset(
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$samples = [[1], [2], [3], [4], [5], [6], [7], [8]],
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$labels = ['a', 'a', 'a', 'a', 'b', 'b', 'b', 'b']
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);
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$seed = 123;
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$randomSplit1 = new RandomSplit($dataset, 0.5, $seed);
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$randomSplit2 = new RandomSplit($dataset, 0.5, $seed);
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$this->assertEquals($randomSplit1->getTestLabels(), $randomSplit2->getTestLabels());
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$this->assertEquals($randomSplit1->getTestSamples(), $randomSplit2->getTestSamples());
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$this->assertEquals($randomSplit1->getTrainLabels(), $randomSplit2->getTrainLabels());
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$this->assertEquals($randomSplit1->getTrainSamples(), $randomSplit2->getTrainSamples());
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}
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public function testDatasetRandomSplitWithDifferentSeed()
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{
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$dataset = new ArrayDataset(
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$samples = [[1], [2], [3], [4], [5], [6], [7], [8]],
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$labels = ['a', 'a', 'a', 'a', 'b', 'b', 'b', 'b']
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);
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$randomSplit1 = new RandomSplit($dataset, 0.5, 4321);
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$randomSplit2 = new RandomSplit($dataset, 0.5, 1234);
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$this->assertNotEquals($randomSplit1->getTestLabels(), $randomSplit2->getTestLabels());
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$this->assertNotEquals($randomSplit1->getTestSamples(), $randomSplit2->getTestSamples());
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$this->assertNotEquals($randomSplit1->getTrainLabels(), $randomSplit2->getTrainLabels());
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$this->assertNotEquals($randomSplit1->getTrainSamples(), $randomSplit2->getTrainSamples());
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}
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public function testRandomSplitCorrectSampleAndLabelPosition()
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{
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$dataset = new ArrayDataset(
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$samples = [[1], [2], [3], [4]],
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$labels = [1, 2, 3, 4]
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);
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$randomSplit = new RandomSplit($dataset, 0.5);
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$this->assertEquals($randomSplit->getTestSamples()[0][0], $randomSplit->getTestLabels()[0]);
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$this->assertEquals($randomSplit->getTestSamples()[1][0], $randomSplit->getTestLabels()[1]);
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$this->assertEquals($randomSplit->getTrainSamples()[0][0], $randomSplit->getTrainLabels()[0]);
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$this->assertEquals($randomSplit->getTrainSamples()[1][0], $randomSplit->getTrainLabels()[1]);
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}
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}
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