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<?php
use Litipk\BigNumbers\Decimal as Decimal;
use PHPUnit\Framework\TestCase;
/**
* @group arctan
*/
class DecimalArctanTest extends TestCase
{
public function arctanProvider() {
// Some values provided by wolframalpha
return [
['0.154', '0.15279961393666', 14],
['0', '0', 17],
['-1', '-0.78539816339744831', 17],
];
}
* @dataProvider arctanProvider
public function testSimple($nr, $answer, $digits)
$x = Decimal::fromString($nr);
$arctanX = $x->arctan($digits);
$this->assertTrue(
Decimal::fromString($answer)->equals($arctanX),
"The answer must be " . $answer . ", but was " . $arctanX
);
Litipk /
php-bignumbers
