Implement ProjectMilestone.issues()

This lists the issues related to the milestone.

Add python API tests for issues.

gitlab/objects.py

@@ -891,6 +891,19 @@ class ProjectMilestone(GitlabObject):
     optionalCreateAttrs = ['description', 'due_date', 'state_event']
     shortPrintAttr = 'title'
 
+    def issues(self):
+        url = "/projects/%s/milestones/%s/issues" % (self.project_id, self.id)
+        r = self.gitlab._raw_get(url)
+        raise_error_from_response(r, GitlabDeleteError)
+
+        l = []
+        for j in r.json():
+            o = ProjectIssue(self, j)
+            o._from_api = True
+            l.append(o)
+
+        return l
+
 
 class ProjectMilestoneManager(BaseManager):
     obj_cls = ProjectMilestone

tools/python_test.py

@@ -131,3 +131,16 @@
 m1.save()
 m1 = admin_project.milestones.get(1)
 assert(m1.state == 'closed')
+
+# issues
+issue1 = admin_project.issues.create({'title': 'my issue 1',
+                                      'milestone_id': m1.id})
+issue2 = admin_project.issues.create({'title': 'my issue 2'})
+issue3 = admin_project.issues.create({'title': 'my issue 3'})
+assert(len(admin_project.issues.list()) == 3)
+issue3.state_event = 'close'
+issue3.save()
+assert(len(admin_project.issues.list(state='closed')) == 1)
+assert(len(admin_project.issues.list(state='opened')) == 2)
+assert(len(admin_project.issues.list(milestone='milestone1')) == 1)
+assert(m1.issues()[0].title == 'my issue 1')