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66 lines
2.2 KiB
66 lines
2.2 KiB
8 months ago
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<?php
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declare(strict_types=1);
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namespace BigintTest;
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use OverflowException;
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use PHPUnit\Framework\TestCase;
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use ZipStream\Bigint;
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class BigintTest extends TestCase
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{
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public function testConstruct(): void
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{
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$bigint = new Bigint(0x12345678);
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$this->assertSame('0x0000000012345678', $bigint->getHex64());
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$this->assertSame(0x12345678, $bigint->getLow32());
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$this->assertSame(0, $bigint->getHigh32());
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}
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public function testConstructLarge(): void
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{
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$bigint = new Bigint(0x87654321);
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$this->assertSame('0x0000000087654321', $bigint->getHex64());
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$this->assertSame('87654321', bin2hex(pack('N', $bigint->getLow32())));
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$this->assertSame(0, $bigint->getHigh32());
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}
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public function testAddSmallValue(): void
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{
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$bigint = new Bigint(1);
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$bigint = $bigint->add(Bigint::init(2));
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$this->assertSame(3, $bigint->getLow32());
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$this->assertFalse($bigint->isOver32());
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$this->assertTrue($bigint->isOver32(true));
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$this->assertSame($bigint->getLowFF(), (float)$bigint->getLow32());
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$this->assertSame($bigint->getLowFF(true), (float)0xFFFFFFFF);
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}
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public function testAddWithOverflowAtLowestByte(): void
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{
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$bigint = new Bigint(0xFF);
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$bigint = $bigint->add(Bigint::init(0x01));
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$this->assertSame(0x100, $bigint->getLow32());
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}
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public function testAddWithOverflowAtInteger32(): void
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{
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$bigint = new Bigint(0xFFFFFFFE);
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$this->assertFalse($bigint->isOver32());
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$bigint = $bigint->add(Bigint::init(0x01));
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$this->assertTrue($bigint->isOver32());
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$bigint = $bigint->add(Bigint::init(0x01));
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$this->assertSame('0x0000000100000000', $bigint->getHex64());
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$this->assertTrue($bigint->isOver32());
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$this->assertSame((float)0xFFFFFFFF, $bigint->getLowFF());
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}
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public function testAddWithOverflowAtInteger64(): void
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{
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$bigint = Bigint::fromLowHigh(0xFFFFFFFF, 0xFFFFFFFF);
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$this->assertSame('0xFFFFFFFFFFFFFFFF', $bigint->getHex64());
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$this->expectException(OverflowException::class);
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$bigint->add(Bigint::init(1));
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}
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}
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