Added storage types

source/PhysicalQuantity/Storage.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace PhpUnitsOfMeasure\PhysicalQuantity;
+
+use PhpUnitsOfMeasure\AbstractPhysicalQuantity;
+use PhpUnitsOfMeasure\UnitOfMeasure;
+
+class Storage extends AbstractPhysicalQuantity
+{
+
+    protected static $unitDefinitions;
+
+    protected static function initialize()
+    {
+        // Byte
+        $unit = UnitOfMeasure::nativeUnitFactory('byte');
+        $unit->addAlias('B');
+        static::addUnit($unit);
+
+        // Bit
+        $unit = UnitOfMeasure::linearUnitFactory('bit', 0.125);
+        $unit->addAlias('b');
+        static::addUnit($unit);
+
+        // kilobyte (KB)
+        $unit = UnitOfMeasure::linearUnitFactory('kilobyte', 1024);
+        $unit->addAlias('KB');
+        static::addUnit($unit);
+
+        // megabyte (MB)
+        $unit = UnitOfMeasure::linearUnitFactory('megabyte', 1048576);
+        $unit->addAlias('MB');
+        static::addUnit($unit);
+
+        // gigabyte (GB)
+        $unit = UnitOfMeasure::linearUnitFactory('gigabyte', 1073741824);
+        $unit->addAlias('GB');
+        static::addUnit($unit);
+
+        // terabyte (TB)
+        $unit = UnitOfMeasure::linearUnitFactory('terabyte', 1099511627776);
+        $unit->addAlias('TB');
+        static::addUnit($unit);
+
+        // petabyte (PB)
+        $unit = UnitOfMeasure::linearUnitFactory('petabyte', 1125899906842624);
+        $unit->addAlias('PB');
+        static::addUnit($unit);
+
+    }
+}

tests/PhysicalQuantity/StorageTest.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace PhpUnitsOfMeasureTest\PhysicalQuantity;
+
+use PhpUnitsOfMeasure\PhysicalQuantity\Storage;
+
+class StorageTest extends AbstractPhysicalQuantityTestCase
+{
+
+    protected function instantiateTestQuantity()
+    {
+    }
+
+    public function testByteToByte()
+    {
+        $this->assertEquals(1, (new Storage(1, 'byte'))->toUnit('B'));
+    }
+
+    public function testByteToBit()
+    {
+        $this->assertEquals(40, (new Storage(5, 'byte'))->toUnit('bit'));
+    }
+
+    public function testBitToByte()
+    {
+        $this->assertEquals(1.25, (new Storage(10, 'b'))->toUnit('B'));
+    }
+
+    public function testMegabyteToByte()
+    {
+        $this->assertEquals(1048576, (new Storage(1, 'MB'))->toUnit('B'));
+    }
+
+    public function testGigabyteToByte()
+    {
+        $this->assertEquals(1073741824, (new Storage(1, 'gigabyte'))->toUnit('byte'));
+    }
+
+    public function testTerabyteToByte()
+    {
+        $this->assertEquals(1099511627776, (new Storage(1, 'TB'))->toUnit('byte'));
+    }
+
+    public function testPetabyteToByte()
+    {
+        $this->assertEquals(3377699720527872, (new Storage(3, 'PB'))->toUnit('byte'));
+    }
+}