add Random Float method

readme.md

@@ -158,7 +158,9 @@ Each of the generator properties (like `name`, `address`, and `lorem`) are calle
 ### `Faker\Provider\Base`
 
     randomDigit             // 7
+    randomDigitNotNull      // 5
     randomNumber($nbDigits = NULL) // 79907610
+    randomFloat($nbMaxDecimals = NULL, $min = 0, $max = NULL) // 48.8932
     randomLetter            // 'b'
     randomElement($array = array ('a','b','c')) // 'b'
     numerify($string = '###') // '609'

src/Faker/Provider/Base.php

@@ -63,6 +63,35 @@ class Base
         return mt_rand(0, pow(10, $nbDigits) - 1);
     }
 
+    /**
+     * Return a random float number
+     * 
+     * @param int $nbMaxDecimals
+     * @param int|float $min
+     * @param int|float $max
+     * @example 48.8932
+     * 
+     * @return float
+     */
+    public static function randomFloat($nbMaxDecimals = null, $min = 0, $max = null)
+    {
+        if (null === $nbMaxDecimals) {
+            $nbMaxDecimals = static::randomDigit();
+        }
+        
+        if (null === $max) {
+            $max = static::randomNumber();
+        }
+        
+        if ($min > $max) {
+            $tmp = $min;
+            $min = $max;
+            $max = $tmp;
+        }
+        
+        return round($min + mt_rand() / mt_getrandmax() * ($max - $min), $nbMaxDecimals);
+    }
+    
     /**
      * Returns a random number between $from and $to
      *

test/Faker/Provider/BaseTest.php

@@ -52,6 +52,22 @@ class BaseTest extends \PHPUnit_Framework_TestCase
         $this->assertGreaterThanOrEqual(BaseProvider::numberBetween($min, $max), $max);
     }
 
+    public function testRandomFloat()
+    {
+        $min = 4;
+        $max = 10;
+        $nbMaxDecimals = 8;
+        
+        $result = BaseProvider::randomFloat($nbMaxDecimals, $min, $max);
+        
+        $parts = explode('.', $result);
+                
+        $this->assertInternalType('float', $result);
+        $this->assertGreaterThanOrEqual($min, $result);
+        $this->assertLessThanOrEqual($max, $result);
+        $this->assertLessThanOrEqual($nbMaxDecimals, strlen($parts[1]));
+    }
+    
     public function testRandomLetterReturnsString()
     {
         $this->assertTrue(is_string(BaseProvider::randomLetter()));