Rewrite the ‘pattern’ test into Mocha

tests/json/attributes/pattern.js

@@ -0,0 +1,45 @@
+if (typeof module !== 'undefined' && module.exports) {
+  var expect = require('expect.js');
+  var Amanda = require('../../../dist/latest.js');
+}
+
+/**
+ * Pattern
+ * --------------------
+ */
+suite('JSON/Attribute/pattern', function() {
+
+  var count = 0;
+
+  /**
+   * Schema
+   */
+  var schema = {
+    type: 'string',
+    pattern: /a/
+  };
+
+  /**
+   * Validator
+   */
+  var Validator = new Amanda('json');
+
+  test('should not return an error', function() {
+    Validator.validate('hola', schema, function(error) {
+      count += 1;
+      expect(error).to.not.be.ok();
+    });
+  });
+
+  test('should return an error', function() {
+    Validator.validate('hello', schema, function(error) {
+      count += 1;
+      expect(error).to.be.ok();
+    });
+  });
+
+  test('should run 2 times', function() {
+    expect(count).to.be.eql(2);
+  });
+
+});