77 lines
1.9 KiB
PHP
77 lines
1.9 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\Tests\Math\Distance;
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use Phpml\Exception\InvalidArgumentException;
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use Phpml\Math\Distance\Minkowski;
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use PHPUnit\Framework\TestCase;
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class MinkowskiTest extends TestCase
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{
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/**
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* @var Minkowski
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*/
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private $distanceMetric;
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protected function setUp(): void
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{
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$this->distanceMetric = new Minkowski();
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}
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public function testThrowExceptionOnInvalidArguments(): void
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{
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$this->expectException(InvalidArgumentException::class);
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$a = [0, 1, 2];
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$b = [0, 2];
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$this->distanceMetric->distance($a, $b);
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}
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public function testCalculateDistanceForOneDimension(): void
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{
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$a = [4];
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$b = [2];
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$expectedDistance = 2;
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$actualDistance = $this->distanceMetric->distance($a, $b);
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self::assertEquals($expectedDistance, $actualDistance);
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}
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public function testCalculateDistanceForTwoDimensions(): void
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{
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$a = [4, 6];
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$b = [2, 5];
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$expectedDistance = 2.080;
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$actualDistance = $this->distanceMetric->distance($a, $b);
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self::assertEqualsWithDelta($expectedDistance, $actualDistance, $delta = 0.001);
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}
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public function testCalculateDistanceForThreeDimensions(): void
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{
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$a = [6, 10, 3];
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$b = [2, 5, 5];
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$expectedDistance = 5.819;
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$actualDistance = $this->distanceMetric->distance($a, $b);
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self::assertEqualsWithDelta($expectedDistance, $actualDistance, $delta = 0.001);
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}
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public function testCalculateDistanceForThreeDimensionsWithDifferentLambda(): void
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{
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$distanceMetric = new Minkowski($lambda = 5);
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$a = [6, 10, 3];
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$b = [2, 5, 5];
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$expectedDistance = 5.300;
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$actualDistance = $distanceMetric->distance($a, $b);
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self::assertEqualsWithDelta($expectedDistance, $actualDistance, $delta = 0.001);
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}
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}
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