From a6a50758c5fa3b69e250e3219d9514bf00dc0992 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=8D=E5=9B=9B?= <busi.hyy@alipay.com>
Date: Wed, 27 Jan 2016 15:22:57 +0800
Subject: [PATCH] feat: support validateWithTranslate

---
 README.md          |  1 +
 index.js           | 23 ++++++++++++++++++++++-
 test/index.test.js | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2224876..59df009 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,7 @@ $ npm install parameter --save
 - `constructor([options])` - new Class `Parameter` instance
   - `options.translate` - translate function
 - `validate(rule, value)` - validate the `value` conforms to `rule`. return an array of errors if break rule.
+- `validateWithTranslate(rule, value, translate)` - validate the `value` conforms to `rule`, with customize translate method.
 - `addRule(type, check)` - add custom rules.
    - `type` - rule type, required and must be string type.
    - `check` - check handler. can be a `function` or a `RegExp`.
diff --git a/index.js b/index.js
index ee48d0b..a420b54 100644
--- a/index.js
+++ b/index.js
@@ -49,13 +49,34 @@ class Parameter {
     }
   }
 
+  /**
+   * validate with customize translate
+   *
+   * @param  {Object} rules
+   * @param  {Mixed} obj
+   * @param  {Function} translate
+   * @return {Object} errors
+   * @api public
+   */
+  validateWithTranslate(rules, obj, translate) {
+    var _translate = this.translate;
+    this.translate = translate;
+    try {
+      return this.validate(rules, obj);
+    } finally {
+      this.translate = _translate;
+    }
+  };
+
   /**
    * validate
    *
    * @param {Object} rules
-   * @return {Object} obj
+   * @param {Mixed} obj
+   * @return {Object} errors
    * @api public
    */
+
   validate(rules, obj) {
     if (typeof rules !== 'object') {
       throw new TypeError('need object type rule');
diff --git a/test/index.test.js b/test/index.test.js
index dc6c6b9..a72d4fd 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -594,4 +594,40 @@ describe('parameter', function () {
       error.field.should.equal('name');
     });
   });
+
+  describe('validateWithTranslate()', function() {
+    it('should work', function() {
+      var translate = function() {
+        var args = Array.prototype.slice.call(arguments);
+        args[0] = args[0] + '-add.';
+        return util.format.apply(util, args);
+      };
+
+      var p1 = new Parameter();
+
+      var rule = { name: 'string' };
+      var error = p1.validateWithTranslate(rule, {}, translate)[0];
+      error.message.should.equal('required-add.');
+      error.code.should.equal('missing_field-add.');
+      error.field.should.equal('name');
+    });
+
+    it('should reset translate', function(done) {
+      var translate = function() {
+        var args = Array.prototype.slice.call(arguments);
+        args[0] = args[0] + '-add.';
+        return util.format.apply(util, args);
+      };
+
+      var p1 = new Parameter();
+
+      var rule = { name: 'invalid' };
+      try {
+        p1.validateWithTranslate(rule, {name: 1}, translate);
+      } catch (e) {
+        should.not.exist(p1.translate);
+        done();
+      }
+    });
+  });
 });