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[feature/phpunit] Add some basic tests for the Math_BigInteger class.
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Andreas Fischer
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261
tests/Math/BigIntegerTest.php
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261
tests/Math/BigIntegerTest.php
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<?php
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/**
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* @author Andreas Fischer <bantu@phpbb.com>
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* @copyright MMXII Andreas Fischer
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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*/
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require('Math/BigInteger.php');
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class BigIntegerTest extends PHPUnit_Framework_TestCase
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{
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public function getInstance($x = 0, $base = 10)
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{
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return new Math_BigInteger($x, $base);
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}
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public function testConstructorBase2()
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{
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// 2**65 = 36893488147419103232
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$this->assertSame('36893488147419103232', (string) $this->getInstance('1' . str_repeat('0', 65), 2));
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}
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public function testConstructorBase10()
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{
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$this->assertSame('18446744073709551616', (string) $this->getInstance('18446744073709551616'));
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}
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public function testConstructorBase16()
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{
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$this->assertSame('50', (string) $this->getInstance('0x32', 16));
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$this->assertSame('12345678910', (string) $this->getInstance('0x2DFDC1C3E', 16));
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$this->assertSame('18446744073709551615', (string) $this->getInstance('0xFFFFFFFFFFFFFFFF', 16));
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$this->assertSame('18446744073709551616', (string) $this->getInstance('0x10000000000000000', 16));
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}
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public function testToBytes()
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{
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$this->assertSame(chr(65), $this->getInstance('65')->toBytes());
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}
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public function testToBytesTwosCompliment()
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{
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$this->assertSame(chr(126), $this->getInstance('01111110', 2)->toBytes(true));
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}
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public function testToHex()
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{
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$this->assertSame('41', $this->getInstance('65')->toHex());
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}
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public function testToBits()
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{
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$this->assertSame('1000001', $this->getInstance('65')->toBits());
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}
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public function testAdd()
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{
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$x = $this->getInstance('18446744073709551615');
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$y = $this->getInstance( '100000000000');
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$a = $x->add($y);
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$b = $y->add($x);
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$this->assertTrue($a->equals($b));
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$this->assertTrue($b->equals($a));
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$this->assertSame('18446744173709551615', (string) $a);
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$this->assertSame('18446744173709551615', (string) $b);
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}
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public function testSubtract()
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{
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$x = $this->getInstance('18446744073709551618');
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$y = $this->getInstance( '4000000000000');
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$this->assertSame('18446740073709551618', (string) $x->subtract($y));
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}
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public function testMultiply()
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{
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$x = $this->getInstance('8589934592'); // 2**33
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$y = $this->getInstance('36893488147419103232'); // 2**65
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$a = $x->multiply($y); // 2**98
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$b = $y->multiply($x); // 2**98
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$this->assertTrue($a->equals($b));
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$this->assertTrue($b->equals($a));
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$this->assertSame('316912650057057350374175801344', (string) $a);
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$this->assertSame('316912650057057350374175801344', (string) $b);
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}
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public function testDivide()
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{
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$x = $this->getInstance('1180591620717411303425'); // 2**70 + 1
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$y = $this->getInstance('12345678910');
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list($q, $r) = $x->divide($y);
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$this->assertSame('95627922070', (string) $q);
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$this->assertSame('10688759725', (string) $r);
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}
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public function testModPow()
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{
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$a = $this->getInstance('10');
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$b = $this->getInstance('20');
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$c = $this->getInstance('30');
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$d = $a->modPow($b, $c);
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$this->assertSame('10', (string) $d);
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}
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public function testModInverse()
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{
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$a = $this->getInstance(30);
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$b = $this->getInstance(17);
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$c = $a->modInverse($b);
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$this->assertSame('4', (string) $c);
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$d = $a->multiply($c);
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list($q, $r) = $d->divide($b);
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$this->assertSame('1', (string) $r);
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}
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public function testExtendedGCD()
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{
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$a = $this->getInstance(693);
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$b = $this->getInstance(609);
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$arr = $a->extendedGCD($b);
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$this->assertSame('21', (string) $arr['gcd']);
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$this->assertSame(21, $a->toString() * $arr['x']->toString() + $b->toString() * $arr['y']->toString());
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}
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public function testGCD()
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{
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$x = $this->getInstance(693);
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$y = $this->getInstance(609);
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$this->assertSame('21', (string) $x->gcd($y));
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}
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public function testAbs()
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{
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$x = $this->getInstance('-18446744073709551617');
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$y = $x->abs();
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$this->assertSame('-18446744073709551617', (string) $x);
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$this->assertSame('18446744073709551617', (string) $y);
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}
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public function testEquals()
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{
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$x = $this->getInstance('18446744073709551616');
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$y = $this->getInstance('18446744073709551616');
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$this->assertTrue($x->equals($y));
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$this->assertTrue($y->equals($x));
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}
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public function testCompare()
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{
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$a = $this->getInstance('-18446744073709551616');
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$b = $this->getInstance('36893488147419103232');
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$c = $this->getInstance('36893488147419103232');
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$d = $this->getInstance('316912650057057350374175801344');
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// a < b
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$this->assertLessThan(0, $a->compare($b));
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$this->assertGreaterThan(0, $b->compare($a));
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// b = c
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$this->assertSame(0, $b->compare($c));
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$this->assertSame(0, $c->compare($b));
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// c < d
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$this->assertLessThan(0, $c->compare($d));
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$this->assertGreaterThan(0, $d->compare($c));
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}
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public function testBitwiseAND()
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{
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$x = $this->getInstance('66666666666666666666666', 16);
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$y = $this->getInstance('33333333333333333333333', 16);
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$z = $this->getInstance('22222222222222222222222', 16);
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$this->assertSame($z->toHex(), $x->bitwise_AND($y)->toHex());
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}
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public function testBitwiseOR()
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{
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$x = $this->getInstance('11111111111111111111111', 16);
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$y = $this->getInstance('EEEEEEEEEEEEEEEEEEEEEEE', 16);
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$z = $this->getInstance('FFFFFFFFFFFFFFFFFFFFFFF', 16);
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$this->assertSame($z->toHex(), $x->bitwise_OR($y)->toHex());
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}
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public function testBitwiseXOR()
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{
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$x = $this->getInstance('AFAFAFAFAFAFAFAFAFAFAFAF', 16);
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$y = $this->getInstance('133713371337133713371337', 16);
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$z = $this->getInstance('BC98BC98BC98BC98BC98BC98', 16);
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$this->assertSame($z->toHex(), $x->bitwise_XOR($y)->toHex());
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}
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public function testBitwiseNOT()
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{
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$x = $this->getInstance('EEEEEEEEEEEEEEEEEEEEEEE', 16);
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$z = $this->getInstance('11111111111111111111111', 16);
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$this->assertSame($z->toHex(), $x->bitwise_NOT()->toHex());
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}
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public function testBitwiseLeftShift()
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{
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$x = $this->getInstance('0x0000000FF0000000', 16);
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$y = $this->getInstance('0x000FF00000000000', 16);
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$this->assertSame($y->toHex(), $x->bitwise_LeftShift(16)->toHex());
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}
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public function testBitwiseRightShift()
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{
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$x = $this->getInstance('0x0000000FF0000000', 16);
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$y = $this->getInstance('0x00000000000FF000', 16);
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$z = $this->getInstance('0x000000000000000F', 16);
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$n = $this->getInstance(0);
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$this->assertSame($y->toHex(), $x->bitwise_RightShift(16)->toHex());
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$this->assertSame($z->toHex(), $x->bitwise_RightShift(32)->toHex());
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$this->assertSame($n->toHex(), $x->bitwise_RightShift(36)->toHex());
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}
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public function testSerializable()
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{
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$x = $this->getInstance('18446744073709551616');
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$y = unserialize(serialize($x));
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$this->assertTrue($x->equals($y));
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$this->assertTrue($y->equals($x));
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$this->assertSame('18446744073709551616', (string) $x);
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$this->assertSame('18446744073709551616', (string) $y);
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}
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public function testClone()
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{
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$x = $this->getInstance('18446744073709551616');
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$y = clone $x;
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$this->assertTrue($x->equals($y));
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$this->assertTrue($y->equals($x));
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$this->assertSame('18446744073709551616', (string) $x);
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$this->assertSame('18446744073709551616', (string) $y);
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}
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}
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