60 lines
1.5 KiB
PHP
60 lines
1.5 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\Tests\Math\Statistic;
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use Phpml\Exception\InvalidArgumentException;
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use Phpml\Math\Statistic\Mean;
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use PHPUnit\Framework\TestCase;
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class MeanTest extends TestCase
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{
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public function testArithmeticThrowExceptionOnEmptyArray(): void
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{
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$this->expectException(InvalidArgumentException::class);
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Mean::arithmetic([]);
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}
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public function testArithmeticMean(): void
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{
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$delta = 0.01;
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self::assertEqualsWithDelta(3.5, Mean::arithmetic([2, 5]), $delta);
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self::assertEqualsWithDelta(41.16, Mean::arithmetic([43, 21, 25, 42, 57, 59]), $delta);
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self::assertEqualsWithDelta(1.7, Mean::arithmetic([0.5, 0.5, 1.5, 2.5, 3.5]), $delta);
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}
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public function testMedianThrowExceptionOnEmptyArray(): void
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{
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$this->expectException(InvalidArgumentException::class);
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Mean::median([]);
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}
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public function testMedianOnOddLengthArray(): void
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{
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$numbers = [5, 2, 6, 1, 3];
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self::assertEquals(3, Mean::median($numbers));
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}
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public function testMedianOnEvenLengthArray(): void
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{
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$numbers = [5, 2, 6, 1, 3, 4];
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self::assertEquals(3.5, Mean::median($numbers));
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}
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public function testModeThrowExceptionOnEmptyArray(): void
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{
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$this->expectException(InvalidArgumentException::class);
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Mean::mode([]);
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}
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public function testModeOnArray(): void
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{
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$numbers = [5, 2, 6, 1, 3, 4, 6, 6, 5];
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self::assertEquals(6, Mean::mode($numbers));
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}
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}
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