Update commenter type

__tests__/main.spec.ts

@@ -1209,7 +1209,7 @@ test('stale issues should not be closed if days is set to -1', async () => {
   expect(processor.removedLabelIssues).toHaveLength(0);
 });
 
-test('stale label should be removed if a comment was added to a stale issue', async () => {
+test('stale label should be removed if a user comment was added to a stale issue', async () => {
   const opts = {...DefaultProcessorOptions, removeStaleWhenUpdated: true};
   const TestIssueList: Issue[] = [
     generateIssue(
@@ -1247,6 +1247,44 @@ test('stale label should be removed if a comment was added to a stale issue', as
   expect(processor.removedLabelIssues).toHaveLength(1);
 });
 
+test('stale label should not be removed if a bot comment was added to a stale issue', async () => {
+  const opts = {...DefaultProcessorOptions, removeStaleWhenUpdated: true};
+  const TestIssueList: Issue[] = [
+    generateIssue(
+      opts,
+      1,
+      'An issue that should un-stale',
+      '2020-01-01T17:00:00Z',
+      '2020-01-01T17:00:00Z',
+      false,
+      false,
+      ['Stale']
+    )
+  ];
+  const processor = new IssuesProcessorMock(
+    opts,
+    alwaysFalseStateMock,
+    async p => (p === 1 ? TestIssueList : []),
+    async () => [
+      {
+        user: {
+          login: 'notme',
+          type: 'Bot'
+        },
+        body: 'Body'
+      }
+    ], // return a fake comment to indicate there was an update
+    async () => new Date().toDateString()
+  );
+
+  // process our fake issue list
+  await processor.processIssues(1);
+
+  expect(processor.closedIssues).toHaveLength(1);
+  expect(processor.staleIssues).toHaveLength(0);
+  expect(processor.removedLabelIssues).toHaveLength(0);
+});
+
 test('when the option "labelsToAddWhenUnstale" is set, the labels should be added when unstale', async () => {
   expect.assertions(4);
   const opts = {
@@ -1360,7 +1398,7 @@ test('stale label should not be removed if a comment was added by the bot (and t
       {
         user: {
           login: 'abot',
-          type: 'User'
+          type: 'Bot'
         },
         body: 'This issue is stale'
       }