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https://github.com/danog/endtoend-test-psl.git
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74 lines
1.6 KiB
PHP
74 lines
1.6 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Psl\Tests\Math;
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use PHPUnit\Framework\TestCase;
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use Psl\Exception;
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use Psl\Math;
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final class LogTest extends TestCase
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{
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/**
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* @dataProvider provideData
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*/
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public function testLog(float $expected, float $number, ?float $base = null): void
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{
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static::assertSame($expected, Math\log($number, $base));
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}
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public function provideData(): array
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{
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return [
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[
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1.6863989535702288,
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5.4,
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null
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],
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[
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0.6574784600188808,
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5.4,
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13
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],
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[
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1.7323937598229686,
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54.0,
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10
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],
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[
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0,
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1,
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null
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],
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];
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}
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public function testNegativeInputThrows(): void
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{
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$this->expectException(Exception\InvariantViolationException::class);
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$this->expectExceptionMessage('Expected a non-negative number.');
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Math\log(-45);
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}
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public function testNonPositiveBaseThrows(): void
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{
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$this->expectException(Exception\InvariantViolationException::class);
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$this->expectExceptionMessage('Expected a non-negative base.');
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Math\log(4.4, 0.0);
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}
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public function testBaseOneThrowsForUndefinedLogarithm(): void
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{
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$this->expectException(Exception\InvariantViolationException::class);
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$this->expectExceptionMessage('Logarithm undefined for base 1.');
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Math\log(4.4, 1.0);
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}
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}
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