Merge pull request #599 from otaviocx/feature/list-commits-on-pull-re…

…quest

Add a function to list the commits on a pull request

lib/Repository.js

@@ -198,6 +198,23 @@ class Repository extends Requestable {
       return this._request('GET', `/repos/${this.__fullname}/commits`, options, cb);
    }
 
+   /**
+    * List the commits on a pull request
+    * @see https://developer.github.com/v3/repos/commits/#list-commits-on-a-repository
+    * @param {number|string} number - the number of the pull request to list the commits
+    * @param {Object} [options] - the filtering options for commits
+    * @param {Requestable.callback} [cb] - will receive the commits information
+    * @return {Promise} - the promise for the http request
+    */
+   listCommitsOnPR(number, options, cb) {
+      options = options || {};
+      if (typeof options === 'function') {
+         cb = options;
+         options = {};
+      }
+      return this._request('GET', `/repos/${this.__fullname}/pulls/${number}/commits`, options, cb);
+   }
+
     /**
      * Gets a single commit information for a repository
      * @see https://developer.github.com/v3/repos/commits/#get-a-single-commit

test/repository.spec.js

@@ -173,6 +173,24 @@ describe('Repository', function() {
          }));
       });
 
+      it('should list commits on a PR with no options', function(done) {
+         const PR_NUMBER = 588;
+         remoteRepo.listCommitsOnPR(PR_NUMBER, assertSuccessful(done, function(err, commits) {
+            expect(commits).to.be.an.array();
+            expect(commits.length).to.be.equal(2);
+
+            let message1 = 'fix(repository): prevents lib from crashing when not providing optional arguments';
+            expect(commits[0].author).to.have.own('login', 'hazmah0');
+            expect(commits[0].commit).to.have.own('message', message1);
+
+            let message2 = 'test(repository): updates test to use promise instead of callback';
+            expect(commits[1].author).to.have.own('login', 'hazmah0');
+            expect(commits[1].commit).to.have.own('message', message2);
+
+            done();
+         }));
+      });
+
       it('should get the latest commit from master', function(done) {
          remoteRepo.getSingleCommit('master', assertSuccessful(done, function(err, commit) {
             expect(commit).to.have.own('sha');