Quantity formatter test.

src/Formatters/QuantityFormatter.php

@@ -26,8 +26,22 @@ class QuantityFormatter implements IFormatter
     public static function format($value)
     {
         $value = Utils::toString($value);
-        $bn = Utils::toBn($value);
 
-        return '0x' . $bn->toHex(true);
+        if (Utils::isZeroPrefixed($value)) {
+            // test hex with zero ahead, hardcode 0x0
+            if ($value === '0x0' || strpos($value, '0x0') !== 0) {
+                return $value;
+            }
+            $hex = preg_replace('/^0x0+(?!$)/', '', $value);
+        } else {
+            $bn = Utils::toBn($value);
+            $hex = $bn->toHex(true);        
+        }
+        if (empty($hex)) {
+            $hex = '0';
+        } else {
+            $hex = preg_replace('/^0+(?!$)/', '', $hex);
+        }
+        return '0x' . $hex;
     }
 }

test/unit/QuantityFormatterTest.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace Test\Unit;
+
+use Test\TestCase;
+use Web3\Formatters\QuantityFormatter;
+
+class QuantityFormatterTest extends TestCase
+{
+    /**
+     * formatter
+     * 
+     * @var \Web3\Formatters\QuantityFormatter
+     */
+    protected $formatter;
+
+    /**
+     * setUp
+     * 
+     * @return void
+     */
+    public function setUp()
+    {
+        parent::setUp();
+        $this->formatter = new QuantityFormatter;
+    }
+
+    /**
+     * testFormat
+     * 
+     * @return void
+     */
+    public function testFormat()
+    {
+        $formatter = $this->formatter;
+
+        $this->assertEquals('0x927c0', $formatter->format(0x0927c0));
+        $this->assertEquals('0x927c0', $formatter->format('0x0927c0'));
+        $this->assertEquals('0x927c0', $formatter->format('0x927c0'));
+        $this->assertEquals('0x927c0', $formatter->format('600000'));
+        $this->assertEquals('0x927c0', $formatter->format(600000));
+        
+        $this->assertEquals('0xea60', $formatter->format('0x0ea60'));
+        $this->assertEquals('0xea60', $formatter->format('0xea60'));
+        $this->assertEquals('0xea60', $formatter->format(0x0ea60));
+        $this->assertEquals('0xea60', $formatter->format('60000'));
+        $this->assertEquals('0xea60', $formatter->format(60000));
+
+        $this->assertEquals('0x0', $formatter->format(0x00));
+        $this->assertEquals('0x0', $formatter->format('0x00'));
+        $this->assertEquals('0x0', $formatter->format('0x0'));
+        $this->assertEquals('0x0', $formatter->format('0'));
+        $this->assertEquals('0x0', $formatter->format(0));
+    }
+}