Rewrite the ‘UniqueItems’ test suite into Mocha

tests/json/attributes/uniqueItems.js

@@ -0,0 +1,67 @@
+if (typeof module !== 'undefined' && module.exports) {
+  var expect = require('expect.js');
+  var Amanda = require('../../../dist/latest.js');
+}
+
+/**
+ * UniqueItems
+ * --------------------
+ */
+suite('JSON/Attribute/uniqueItems', function() {
+
+  var count = 0;
+
+  /**
+   * Schema
+   */
+  var schema = {
+    required: true,
+    type: 'array',
+    uniqueItems: true,
+    items: {
+      type: 'string'
+    }
+  };
+
+  /**
+   * Validator
+   */
+  var Validator = new Amanda('json');
+
+  test('should return an error', function() {
+    [
+      ['a', 'a', 'a'],
+      ['a', 'a', 'b'],
+      ['a', 'b', 'a'],
+      ['a', 'b', 'b'],
+      ['a', 'b', 'a', 'b'],
+      [1, 1, 1],
+      [1, 1, 2],
+      [1, 2, 1],
+      [1, 2, 2],
+      [1, 2, 1, 2],
+    ].forEach(function(input) {
+      Validator.validate(input, schema, function(error) {
+        count += 1;
+        expect(error).to.be.ok();
+      });
+    });
+  });
+
+  test('should not return an error', function() {
+    [
+      [],
+      ['a', 'b', 'c'],
+    ].forEach(function(input) {
+      Validator.validate(input, schema, function(error) {
+        count += 1;
+        expect(error).to.not.be.ok();
+      });
+    });
+  });
+
+  test('should run 12 times', function() {
+    expect(count).to.be.eql(12);
+  });
+
+});