Add/remove labels to an issue

lib/Issue.js

@@ -246,6 +246,30 @@ class Issue extends Requestable {
    deleteLabel(label, cb) {
       return this._request('DELETE', `/repos/${this.__repository}/labels/${label}`, null, cb);
    }
+
+  /**
+   * Set labels to an issue
+   * @see https://developer.github.com/v3/issues/labels/#add-labels-to-an-issue
+   * @param {number} issue - the id of the issue to comment on
+   * @param {array} labels - the names of the labels to add to the issue
+   * @param {Requestable.callback} [cb] - will receive the status
+   * @return {Promise} - the promise for the http request
+   */
+   setLabels(issue, labels, cb) {
+      return this._request('POST', `/repos/${this.__repository}/issues/${issue}/labels`, labels, cb);
+   }
+
+  /**
+   * Remove a label from an issue
+   * @see https://developer.github.com/v3/issues/labels/#remove-a-label-from-an-issue
+   * @param {number} issue - the id of the issue to comment on
+   * @param {string} label - the name of the label to remove to the issue
+   * @param {Requestable.callback} [cb] - will receive the status
+   * @return {Promise} - the promise for the http request
+   */
+   removeLabel(issue, label, cb) {
+      return this._request('DELETE', `/repos/${this.__repository}/issues/${issue}/labels/${label}`, null, cb);
+   }
 }
 
 module.exports = Issue;

test/issue.spec.js

@@ -163,6 +163,23 @@ describe('Issue', function() {
 
       it('should delete issue comment', function(done) {
          remoteIssues.deleteIssueComment(issueCommentId, assertSuccessful(done, function(err, response) {
+            expect(response.).to.be.true();
+
+            done();
+         }));
+      });
+
+      it('should set labels to an issue', function(done) {
+         const labelName = 'test label'
+         remoteIssues.setLabels(issueCommentId, [labelName], assertSuccessful(done, function(err, response) {
+            expect(response[0]).to.have.own('name', labelName);
+
+            done();
+         }));
+      });
+
+      it('should remove labels to an issue', function(done) {
+         remoteIssues.removeLabel(issueCommentId, 'test label', assertSuccessful(done, function(err, response) {
             expect(response).to.be.true();
 
             done();