Added Issue.Delete and unit test.

issue.go

@@ -783,3 +783,21 @@ func InitIssueWithMetaAndFields(metaProject *MetaProject, metaIssuetype *MetaIss
 
 	return issue, nil
 }
+
+// Delete will delete a specified issue.
+func (s *IssueService) Delete(issueID string) (*Response, error) {
+	apiEndpoint := fmt.Sprintf("rest/api/2/issue/%s", issueID)
+
+	// to enable deletion of subtasks; without this, the request will fail if the issue has subtasks
+	deletePayload := make(map[string]interface{})
+	deletePayload["deleteSubtasks"] = "true"
+	content, _ := json.Marshal(deletePayload)
+
+	req, err := s.client.NewRequest("DELETE", apiEndpoint, content)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := s.client.Do(req, nil)
+	return resp, err
+}

issue_test.go

@@ -957,3 +957,23 @@ func TestInitIssueWithmetaAndFields_FailureWithUnknownValueType(t *testing.T) {
 	}
 
 }
+
+func TestIssueService_Delete(t *testing.T) {
+	setup()
+	defer teardown()
+	testMux.HandleFunc("/rest/api/2/issue/10002", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "DELETE")
+		testRequestURL(t, r, "/rest/api/2/issue/10002")
+
+		w.WriteHeader(http.StatusNoContent)
+		fmt.Fprint(w, `{}`)
+	})
+
+	resp, err := testClient.Issue.Delete("10002")
+	if resp.StatusCode != 204 {
+		t.Error("Expected issue not deleted.")
+	}
+	if err != nil {
+		t.Errorf("Error given: %s", err)
+	}
+}