First TwoPlayerTrueSkillCalculator unit test passed

PHPSkills/Numerics/Range.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Moserware\Numerics;
+
+// The whole purpose of this class is to make the code for the SkillCalculator(s)
+// look a little cleaner
+
+class Range
+{
+    private $_min;
+    private $_max;
+    
+    public function __construct($min, $max)
+    {
+        if ($min > $max)
+        {
+            throw new Exception("min > max");
+        }
+
+        $this->_min = $min;
+        $this->_max = $max;
+    }
+
+    public function getMin()
+    {
+        return $this->_min;
+    }    
+    
+    public function getMax()
+    {
+        return $this->_max;
+    }
+    
+    protected static function create($min, $max)
+    {
+        return new Range($min, $max);
+    }
+
+    // REVIEW: It's probably bad form to have access statics via a derived class, but the syntax looks better :-)
+
+    public static function inclusive($min, $max)
+    {
+        return static::create($min, $max);
+    }
+
+    public static function exactly($value)
+    {
+        return static::create($value, $value);
+    }
+
+    public static function atLeast($minimumValue)
+    {
+        return static::create($minimumValue, PHP_INT_MAX );
+    }
+
+    public function isInRange($value)
+    {
+        return ($this->_min <= $value) && ($value <= $this->_max);
+    }
+}
+
+?>