Ignore edits to issues predating the bot (#13460)

utils/issue-format-bot/lib/issueedit.js

@@ -7,6 +7,9 @@ const parse = require('./parse'),
   labeler = require('./labeler'),
   _ = require('lodash');
 
+// We do this outside the event handler to avoid setting up and tearing down this object each time a hook is received
+const botStartDate = new Date('2018-09-25');
+
 // TODO make this share more with newissue.js?
 
 module.exports = function(robot, alexa) {
@@ -20,6 +23,12 @@ module.exports = function(robot, alexa) {
       return;
     }
 
+    const createdAt = new Date(context.payload.issue.created_at);
+    if (createdAt <= botStartDate) {
+      robot.log('Ignoring event for a legacy, pre-bot issue.');
+      return;
+    }
+
     const data = parse(context.payload.issue.body);
 
     // Check if the data is problematic

utils/issue-format-bot/test/labeler-test.js

@@ -37,7 +37,7 @@ function resetSpies(context) {
 }
 
 function addLabelsCalledOnce(err, context) {
-  assert.ok(context.github.issues.addLabels.calledOnce);
+  assert.isTrue(context.github.issues.addLabels.calledOnce);
 }
 
 function assertWhichLabel(label) {