feat(setOptions): add spec "setOptions: it should override the duplic…

…ate key"

src/index.js

@@ -1,8 +1,8 @@
 // no dependencies
-const TYPE = Symbol();
-const VALUE = Symbol();
-const OPTS = Symbol();
-const META = Symbol();
+const TYPE = Symbol('type');
+const VALUE = Symbol('value');
+const OPTS = Symbol('options');
+const META = Symbol('meta');
 
 // @class Token
 export default class Token {
@@ -81,6 +81,16 @@ export default class Token {
     return this;
   }
 
+  /**
+  * @method setOptions
+  * @param {object} options - override the options
+  * @returns {this} this
+  */
+  setOptions(options) {
+    this[OPTS] = { ...this[OPTS], ...options };
+    return this;
+  }
+
   /**
   * @method setMeta
   * @param {string} key - a meta key

test/index.js

@@ -45,6 +45,15 @@ test('clone is should be changed meta-information only', (t) => {
   t.true(clonedToken.meta.transformer === 'johndue');
 });
 
+test('setOptions: it should override the duplicate key', (t) => {
+  const token = new Token('text', 'foo', { pitch: 1 });
+  token.setOptions({ volume: 0.5, pitch: 2 });
+
+  t.true(Object.keys(token.options).length === 2);
+  t.true(token.options.volume === 0.5);
+  t.true(token.options.pitch === 2);
+});
+
 test('should expose the property at the JSON.stringify', (t) => {
   const string = JSON.stringify(new Token('text', 'foo'));
   t.true(string === JSON.stringify({ type: 'text', value: 'foo', options: {}, meta: {} }));