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<?php |
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use Litipk\BigNumbers\Decimal as Decimal; |
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use PHPUnit\Framework\TestCase; |
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6
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/** |
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* @group arcsin |
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*/ |
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class DecimalArcsinTest extends TestCase |
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{ |
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public function arcsinProvider() { |
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// Some values provided by wolframalpha |
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return [ |
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['0.154', '0.15461530016096', 14], |
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['1', '1.57079632679489662', 17], |
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['-1', '-1.57079632679489662', 17], |
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]; |
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} |
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/** |
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* @dataProvider arcsinProvider |
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*/ |
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public function testSimple($nr, $answer, $digits) |
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{ |
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$x = Decimal::fromString($nr); |
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$arcsinX = $x->arcsin($digits); |
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$this->assertTrue( |
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Decimal::fromString($answer)->equals($arcsinX), |
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"The answer must be " . $answer . ", but was " . $arcsinX |
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); |
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} |
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/** |
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* @expectedException \DomainException |
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* @expectedExceptionMessage The arcsin of this number is undefined. |
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*/ |
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public function testArcsinGreaterThanOne() |
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{ |
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Decimal::fromString('25.546')->arcsin(); |
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} |
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/** |
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* @expectedException \DomainException |
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* @expectedExceptionMessage The arcsin of this number is undefined. |
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*/ |
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public function testArcsinFewerThanNegativeOne() |
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{ |
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Decimal::fromString('-304.75')->arcsin(); |
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} |
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} |
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Litipk /
php-bignumbers
