mirror of
https://github.com/PHPOffice/PhpSpreadsheet.git
synced 2026-09-12 02:56:44 +00:00
oleibman
65 lines
2.3 KiB
PHP
65 lines
2.3 KiB
PHP
<?php
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declare(strict_types=1);
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namespace PhpOffice\PhpSpreadsheetTests\Shared\Trend;
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use PhpOffice\PhpSpreadsheet\Shared\Trend\LinearBestFit;
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use PHPUnit\Framework\Attributes\DataProvider;
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use PHPUnit\Framework\TestCase;
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class LinearBestFitTest extends TestCase
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{
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const LBF_PRECISION = 1.0E-8;
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/**
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* @param array<mixed> $expectedSlope
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* @param array<mixed> $expectedIntersect
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* @param array<mixed> $expectedGoodnessOfFit
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* @param array<float> $yValues
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* @param array<float> $xValues
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*/
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#[DataProvider('providerLinearBestFit')]
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public function testLinearBestFit(
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array $expectedSlope,
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array $expectedIntersect,
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array $expectedGoodnessOfFit,
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mixed $expectedEquation,
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array $yValues,
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array $xValues,
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float $xForY,
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): void {
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$bestFit = new LinearBestFit($yValues, $xValues);
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$slope = $bestFit->getSlope(1);
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self::assertEqualsWithDelta($expectedSlope[0], $slope, self::LBF_PRECISION);
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$slope = $bestFit->getSlope();
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self::assertEqualsWithDelta($expectedSlope[1], $slope, self::LBF_PRECISION);
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$intersect = $bestFit->getIntersect(1);
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self::assertEqualsWithDelta($expectedIntersect[0], $intersect, self::LBF_PRECISION);
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$intersect = $bestFit->getIntersect();
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self::assertEqualsWithDelta($expectedIntersect[1], $intersect, self::LBF_PRECISION);
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$equation = $bestFit->getEquation(2);
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self::assertEquals($expectedEquation, $equation);
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self::assertSame($expectedGoodnessOfFit[0], $bestFit->getGoodnessOfFit(6));
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self::assertSame($expectedGoodnessOfFit[1], $bestFit->getGoodnessOfFit());
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self::assertEqualsWithDelta($xForY, $bestFit->getValueOfXForY(0.0), self::LBF_PRECISION);
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}
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public static function providerLinearBestFit(): array
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{
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return require 'tests/data/Shared/Trend/LinearBestFit.php';
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}
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public function testConstructor(): void
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{
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$bestFit = new LinearBestFit([1, 2, 3], [4, 5]);
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self::assertTrue($bestFit->getError());
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$bestFit = new LinearBestFit([6.0, 8.0, 10.0]);
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self::assertFalse($bestFit->getError());
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self::assertSame([6.0, 8.0, 10.0], $bestFit->getYValues());
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self::assertSame([1.0, 2.0, 3.0], $bestFit->getXValues());
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}
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}
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