Improve performance

Remove floatval() function from fromBytes() and toBytes() method to
improve performance in case that this class was called many times such
as uses in profiler.

Add more test to make sure that the test result cover all the byte
values.

Rundiz/Number/Number.php

@@ -136,7 +136,7 @@ public function fromBytes($size, $unit = 'AUTO', $decimal = 2)
             $byte_units = array_reverse($this->byte_units);
             foreach ($byte_units as $size_unit => $size_unit_conversion) {
                 $size_unit_conversion = (string) $size_unit_conversion;
-                if (floatval($size) >= floatval($size_unit_conversion) && $unit == 'AUTO') {
+                if ($size >= $size_unit_conversion && $unit == 'AUTO') {
                     $output = bcdiv($size, $size_unit_conversion, $decimal).' '.$size_unit;
                     break;
                 }
@@ -166,7 +166,7 @@ public function toBytes($size)
 
         $size_number = 0;
         if (isset($matches[1])) {
-            $size_number = floatval($matches[1]);
+            $size_number = $matches[1];
         } else {
             return false;
         }

tests/phpunit/NumberTest.php

@@ -27,7 +27,18 @@ public function testConvertByte()
     {
         $Number = new \Rundiz\Number\Number();
         $this->assertEquals('100.00 GB', $Number->fromBytes(100000000000));
+        $this->assertEquals('123.45 GB', $Number->fromBytes(123456789123));
+        $this->assertEquals('123.45 B', $Number->fromBytes(123.456789123));
+        $this->assertFalse($Number->fromBytes(-123.456789123));
+
         $this->assertEquals('8020000000000', $Number->toBytes('8.02TB'));
+        $this->assertEquals('123456789000', $Number->toBytes('123.456789GB'));
+        $this->assertEquals('98765', $Number->toBytes('98.765KB'));
+        $this->assertEquals('98765.43', $Number->toBytes('98.76543KB'));
+        $this->assertEquals('101135.80032', $Number->toBytes('98.76543KiB'));
+        $this->assertEquals('132560717806.04314', $Number->toBytes('123.456789GiB'));
+        $this->assertFalse($Number->toBytes('98.76543 KiB'));
+        $this->assertFalse($Number->toBytes('-123.456789GiB'));
     }// testConvertByte