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<?php |
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use Litipk\BigNumbers\Decimal as Decimal; |
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date_default_timezone_set('UTC'); |
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8
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9
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class DecimalCompTest extends PHPUnit_Framework_TestCase |
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{ |
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public function testSelfComp() |
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{ |
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$ten = Decimal::fromInteger(10); |
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$this->assertTrue($ten->comp($ten) === 0); |
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} |
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public function testBasicCases() |
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{ |
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$one = Decimal::fromInteger(1); |
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$ten = Decimal::fromInteger(10); |
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$this->assertTrue($one->comp($ten) === -1); |
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$this->assertTrue($ten->comp($one) === 1); |
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} |
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public function testUnscaledComp() |
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{ |
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// Transitivity |
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$this->assertEquals(-1, Decimal::fromFloat(1.001)->comp(Decimal::fromFloat(1.01))); |
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$this->assertEquals(1, Decimal::fromFloat(1.01)->comp(Decimal::fromFloat(1.004))); |
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$this->assertEquals(-1, Decimal::fromFloat(1.001)->comp(Decimal::fromFloat(1.004))); |
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// Reflexivity |
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$this->assertEquals(0, Decimal::fromFloat(1.00525)->comp(Decimal::fromFloat(1.00525))); |
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// Symmetry |
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$this->assertEquals(1, Decimal::fromFloat(1.01)->comp(Decimal::fromFloat(1.001))); |
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$this->assertEquals(-1, Decimal::fromFloat(1.004)->comp(Decimal::fromFloat(1.01))); |
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$this->assertEquals(1, Decimal::fromFloat(1.004)->comp(Decimal::fromFloat(1.001))); |
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$this->assertEquals(1, Decimal::fromFloat(1.004)->comp(Decimal::fromFloat(1.000))); |
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// Warning, float to Decimal conversion can have unexpected behaviors, like converting |
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// 1.005 to Decimal("1.0049999999999999") |
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$this->assertEquals(-1, Decimal::fromFloat(1.0050000000001)->comp(Decimal::fromFloat(1.010))); |
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$this->assertEquals(-1, Decimal::fromString("1.005")->comp(Decimal::fromString("1.010"))); |
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# Proper rounding |
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$this->assertEquals(-1, Decimal::fromFloat(1.004)->comp(Decimal::fromFloat(1.0050000000001))); |
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} |
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public function testScaledComp() |
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{ |
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// Transitivity |
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$this->assertEquals(0, Decimal::fromFloat(1.001)->comp(Decimal::fromFloat(1.01), 1)); |
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$this->assertEquals(0, Decimal::fromFloat(1.01)->comp(Decimal::fromFloat(1.004), 1)); |
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$this->assertEquals(0, Decimal::fromFloat(1.001)->comp(Decimal::fromFloat(1.004), 1)); |
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// Reflexivity |
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$this->assertEquals(0, Decimal::fromFloat(1.00525)->comp(Decimal::fromFloat(1.00525), 2)); |
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// Symmetry |
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$this->assertEquals(0, Decimal::fromFloat(1.01)->comp(Decimal::fromFloat(1.001), 1)); |
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$this->assertEquals(0, Decimal::fromFloat(1.004)->comp(Decimal::fromFloat(1.01), 1)); |
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$this->assertEquals(0, Decimal::fromFloat(1.004)->comp(Decimal::fromFloat(1.001), 1)); |
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// Proper rounding |
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$this->assertEquals(0, Decimal::fromFloat(1.004)->comp(Decimal::fromFloat(1.000), 2)); |
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// Warning, float to Decimal conversion can have unexpected behaviors, like converting |
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// 1.005 to Decimal("1.0049999999999999") |
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$this->assertEquals(0, Decimal::fromFloat(1.0050000000001)->comp(Decimal::fromFloat(1.010), 2)); |
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$this->assertEquals(0, Decimal::fromString("1.005")->comp(Decimal::fromString("1.010"), 2)); |
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# Proper rounding |
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$this->assertEquals(-1, Decimal::fromFloat(1.004)->comp(Decimal::fromFloat(1.0050000000001), 2)); |
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} |
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} |
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Litipk /
php-bignumbers
