52 lines
1.2 KiB
PHP
52 lines
1.2 KiB
PHP
<?php
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declare (strict_types = 1);
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namespace tests\Phpml\Metric;
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use Phpml\Metric\Distance;
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class DistanceTest 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 testThrowExceptionOnInvalidArgumentsInEuclidean()
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{
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$a = [0, 1, 2];
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$b = [0, 2];
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Distance::euclidean($a, $b);
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}
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public function testCalculateEuclideanDistanceForOneDimension()
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{
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$a = [4];
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$b = [2];
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$expectedDistance = 2;
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$actualDistance = Distance::euclidean($a, $b);
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$this->assertEquals($expectedDistance, $actualDistance);
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}
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public function testCalculateEuclideanDistanceForTwoAndMoreDimension()
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{
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$a = [4, 6];
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$b = [2, 5];
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$expectedDistance = 2.2360679774998;
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$actualDistance = Distance::euclidean($a, $b);
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$this->assertEquals($expectedDistance, $actualDistance);
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$a = [6, 10, 3];
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$b = [2, 5, 5];
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$expectedDistance = 6.7082039324993694;
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$actualDistance = Distance::euclidean($a, $b);
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$this->assertEquals($expectedDistance, $actualDistance);
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}
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}
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