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<?php
use Litipk\BigNumbers\Decimal as Decimal;
/**
* @group arcsin
*/
class DecimalArccosTest extends PHPUnit_Framework_TestCase
{
public function arccosProvider() {
// Some values provided by wolframalpha
return [
['0.154', '1.41618102663394', 14],
['1', '0', 17],
['-1', '3.14159265358979324', 17],
];
}
* @dataProvider arccosProvider
public function testSimple($nr, $answer, $digits)
$x = Decimal::fromString($nr);
$arccosX = $x->arccos($digits);
$this->assertTrue(
Decimal::fromString($answer)->equals($arccosX),
"The answer must be " . $answer . ", but was " . $arccosX
);
* @expectedException \DomainException
* @expectedExceptionMessage The arccos of this number is undefined.
public function testArcosGreaterThanOne()
Decimal::fromString('25.546')->arccos();
public function testArccosFewerThanNegativeOne()
Decimal::fromString('-304.75')->arccos();
Litipk /
php-bignumbers
