alphaNumeric takes now count as a argument

Author: krzkaczor

lib/random.js

@@ -193,10 +193,20 @@ function Random (faker, seed) {
    * alphaNumeric
    *
    * @method faker.random.alphaNumeric
+   * @param {number} count defaults to 1
    */
-  this.alphaNumeric = function alphaNumeric() {
-    return faker.random.arrayElement(["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]);
-  }
+  this.alphaNumeric = function alphaNumeric(count) {
+    if (typeof count === "undefined") {
+      count = 1;
+    }
+
+    var wholeString = "";
+    for(var i = 0; i < count; i++) {
+      wholeString += faker.random.arrayElement(["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]);
+    }
+
+    return wholeString;
+  };
 
   return this;
 

test/random.unit.js

@@ -115,4 +115,16 @@ describe("random.js", function () {
       assert.ok(/^\d+\.\d+\.\d+$/.test(semver));
     });
   });
+
+  describe('alphaNumeric', function() {
+    var alphaNumeric = faker.random.alphaNumeric;
+
+    it('should generate single character when no additional argument was provided', function() {
+      assert.ok(alphaNumeric().length === 1);
+    })
+
+    it('should generate many random characters', function() {
+      assert.ok(alphaNumeric(5).length === 5);
+    })
+  })
 });