php-ml/tests/Math/Distance/ChebyshevTest.php

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<?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\Chebyshev;
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use PHPUnit\Framework\TestCase;
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class ChebyshevTest extends TestCase
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{
/**
* @var Chebyshev
*/
private $distanceMetric;
protected function setUp(): void
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{
$this->distanceMetric = new Chebyshev();
}
public function testThrowExceptionOnInvalidArguments(): void
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{
$this->expectException(InvalidArgumentException::class);
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$a = [0, 1, 2];
$b = [0, 2];
$this->distanceMetric->distance($a, $b);
}
public function testCalculateDistanceForOneDimension(): void
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{
$a = [4];
$b = [2];
$expectedDistance = 2;
$actualDistance = $this->distanceMetric->distance($a, $b);
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self::assertEquals($expectedDistance, $actualDistance);
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}
public function testCalculateDistanceForTwoDimensions(): void
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{
$a = [4, 6];
$b = [2, 5];
$expectedDistance = 2;
$actualDistance = $this->distanceMetric->distance($a, $b);
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self::assertEquals($expectedDistance, $actualDistance);
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}
public function testCalculateDistanceForThreeDimensions(): void
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{
$a = [6, 10, 3];
$b = [2, 5, 5];
$expectedDistance = 5;
$actualDistance = $this->distanceMetric->distance($a, $b);
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self::assertEquals($expectedDistance, $actualDistance);
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}
}