diff --git a/tracker/test/issuebulkedit_test.py b/tracker/test/issuebulkedit_test.py
new file mode 100644
index 0000000..89d9bc3
--- /dev/null
+++ b/tracker/test/issuebulkedit_test.py
@@ -0,0 +1,892 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file or at
+# https://developers.google.com/open-source/licenses/bsd
+
+"""Unittests for monorail.tracker.issuebulkedit."""
+from __future__ import print_function
+from __future__ import division
+from __future__ import absolute_import
+
+import mock
+import os
+import unittest
+import webapp2
+
+from google.appengine.api import memcache
+from google.appengine.ext import testbed
+
+from framework import exceptions
+from framework import permissions
+from proto import tracker_pb2
+from services import service_manager
+from services import tracker_fulltext
+from testing import fake
+from testing import testing_helpers
+from tracker import issuebulkedit
+from tracker import tracker_bizobj
+from tracker import tracker_constants
+
+
+class Response(object):
+
+  def __init__(self):
+    self.status = None
+
+
+class IssueBulkEditTest(unittest.TestCase):
+
+  def setUp(self):
+    self.services = service_manager.Services(
+        features=fake.FeaturesService(),
+        project=fake.ProjectService(),
+        config=fake.ConfigService(),
+        issue=fake.IssueService(),
+        issue_star=fake.IssueStarService(),
+        user=fake.UserService(),
+        usergroup=fake.UserGroupService())
+    self.servlet = issuebulkedit.IssueBulkEdit(
+        'req', 'res', services=self.services)
+    self.mr = testing_helpers.MakeMonorailRequest(
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET)
+    self.project = self.services.project.TestAddProject(
+        name='proj', project_id=789, owner_ids=[111])
+    self.cnxn = 'fake connection'
+    self.config = self.services.config.GetProjectConfig(
+        self.cnxn, self.project.project_id)
+    self.services.config.StoreConfig(self.cnxn, self.config)
+    self.owner = self.services.user.TestAddUser('owner@example.com', 111)
+
+    self.testbed = testbed.Testbed()
+    self.testbed.activate()
+    self.testbed.init_memcache_stub()
+    self.testbed.init_datastore_v3_stub()
+
+    self.mocked_methods = {}
+
+  def tearDown(self):
+    """Restore mocked objects of other modules."""
+    self.testbed.deactivate()
+    for obj, items in self.mocked_methods.items():
+      for member, previous_value in items.items():
+        setattr(obj, member, previous_value)
+
+  def testAssertBasePermission(self):
+    """Permit users with EDIT_ISSUE and ADD_ISSUE_COMMENT permissions."""
+    mr = testing_helpers.MakeMonorailRequest(
+        perms=permissions.CONTRIBUTOR_ACTIVE_PERMISSIONSET)
+    self.assertRaises(permissions.PermissionException,
+                      self.servlet.AssertBasePermission, mr)
+
+    self.servlet.AssertBasePermission(self.mr)
+
+  def testGatherPageData(self):
+    """Test GPD works in a normal no-corner-cases case."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 0, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project)
+    mr.local_id_list = [local_id_1]
+
+    page_data = self.servlet.GatherPageData(mr)
+    self.assertEqual(1, page_data['num_issues'])
+
+  def testGatherPageData_CustomFieldEdition(self):
+    """Test GPD works in a normal no-corner-cases case."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 0, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project, perms=permissions.PermissionSet([]))
+    mr.local_id_list = [local_id_1]
+    mr.auth.effective_ids = {222}
+
+    fd_not_restricted = tracker_bizobj.MakeFieldDef(
+        123,
+        789,
+        'CPU',
+        tracker_pb2.FieldTypes.INT_TYPE,
+        None,
+        '',
+        False,
+        False,
+        False,
+        None,
+        None,
+        '',
+        False,
+        '',
+        '',
+        tracker_pb2.NotifyTriggers.NEVER,
+        'no_action',
+        'doc',
+        False,
+        is_restricted_field=False)
+    self.config.field_defs.append(fd_not_restricted)
+
+    fd_restricted = tracker_bizobj.MakeFieldDef(
+        124,
+        789,
+        'CPU',
+        tracker_pb2.FieldTypes.INT_TYPE,
+        None,
+        '',
+        False,
+        False,
+        False,
+        None,
+        None,
+        '',
+        False,
+        '',
+        '',
+        tracker_pb2.NotifyTriggers.NEVER,
+        'no_action',
+        'doc',
+        False,
+        is_restricted_field=True)
+    self.config.field_defs.append(fd_restricted)
+
+    page_data = self.servlet.GatherPageData(mr)
+    self.assertTrue(page_data['fields'][0].is_editable)
+    self.assertFalse(page_data['fields'][1].is_editable)
+
+  def testGatherPageData_NoIssues(self):
+    """Test GPD when no issues are specified in the mr."""
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project)
+    self.assertRaises(exceptions.InputException,
+                      self.servlet.GatherPageData, mr)
+
+  def testGatherPageData_FilteredIssues(self):
+    """Test GPD when all specified issues get filtered out."""
+    created_issue_1 = fake.MakeTestIssue(
+        789,
+        1,
+        'issue summary',
+        'New',
+        0,
+        reporter_id=111,
+        labels=['restrict-view-Googler'])
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project)
+    mr.local_id_list = [local_id_1]
+
+    self.assertRaises(webapp2.HTTPException,
+                      self.servlet.GatherPageData, mr)
+
+  def testGatherPageData_TypeLabels(self):
+    """Test that GPD displays a custom field for appropriate issues."""
+    created_issue_1 = fake.MakeTestIssue(
+        789,
+        1,
+        'issue summary',
+        'New',
+        0,
+        reporter_id=111,
+        labels=['type-customlabels'])
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project)
+    mr.local_id_list = [local_id_1]
+
+    fd = tracker_bizobj.MakeFieldDef(
+        123, 789, 'CPU', tracker_pb2.FieldTypes.INT_TYPE, None,
+        '', False, False, False, None, None, '', False, '', '',
+        tracker_pb2.NotifyTriggers.NEVER, 'no_action', 'doc', False)
+    self.config.field_defs.append(fd)
+
+    page_data = self.servlet.GatherPageData(mr)
+    self.assertEqual(1, len(page_data['fields']))
+
+  @mock.patch('framework.cloud_tasks_helpers.create_task')
+  def testProcessFormData(self, _create_task_mock):
+    """Test that PFD works in a normal no-corner-cases case."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1]
+
+    post_data = fake.PostData(
+        owner=['owner@example.com'], can=[1],
+        q=[''], colspec=[''], sort=[''], groupby=[''], start=[0], num=[100])
+    self._MockMethods()
+    url = self.servlet.ProcessFormData(mr, post_data)
+    self.assertTrue('list?can=1&q=&saved=1' in url)
+
+  def testProcessFormData_NoIssues(self):
+    """Test PFD when no issues are specified."""
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    post_data = fake.PostData()
+    self.servlet.response = Response()
+    self.servlet.ProcessFormData(mr, post_data)
+    # 400 == bad request
+    self.assertEqual(400, self.servlet.response.status)
+
+  def testProcessFormData_NoUser(self):
+    """Test PFD when the user is not logged in."""
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project)
+    mr.local_id_list = [99999]
+    post_data = fake.PostData()
+    self.servlet.response = Response()
+    self.servlet.ProcessFormData(mr, post_data)
+    # 400 == bad request
+    self.assertEqual(400, self.servlet.response.status)
+
+  def testProcessFormData_CantComment(self):
+    """Test PFD when the user can't comment on any of the issues."""
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.EMPTY_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [99999]
+    post_data = fake.PostData()
+    self.servlet.response = Response()
+    self.servlet.ProcessFormData(mr, post_data)
+    # 400 == bad request
+    self.assertEqual(400, self.servlet.response.status)
+
+  def testProcessFormData_CantEdit(self):
+    """Test PFD when the user can't edit any issue metadata."""
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.CONTRIBUTOR_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [99999]
+    post_data = fake.PostData()
+    self.servlet.response = Response()
+    self.servlet.ProcessFormData(mr, post_data)
+    # 400 == bad request
+    self.assertEqual(400, self.servlet.response.status)
+
+  def testProcessFormData_CantMove(self):
+    """Test PFD when the user can't move issues."""
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.COMMITTER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [99999]
+    post_data = fake.PostData(move_to=['proj'])
+    self.servlet.response = Response()
+    self.servlet.ProcessFormData(mr, post_data)
+    # 400 == bad request
+    self.assertEqual(400, self.servlet.response.status)
+
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr.perms = permissions.OWNER_ACTIVE_PERMISSIONSET
+    mr.local_id_list = [local_id_1]
+    mr.project_name = 'proj'
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertEqual(
+        'The issues are already in project proj', mr.errors.move_to)
+
+    post_data = fake.PostData(move_to=['notexist'])
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertEqual('No such project: notexist', mr.errors.move_to)
+
+  def _MockMethods(self):
+    # Mock methods of other modules to avoid unnecessary testing
+    self.mocked_methods[tracker_fulltext] = {
+        'IndexIssues': tracker_fulltext.IndexIssues,
+        'UnindexIssues': tracker_fulltext.UnindexIssues}
+    def DoNothing(*_args, **_kwargs):
+      pass
+    self.servlet.PleaseCorrect = DoNothing
+    tracker_fulltext.IndexIssues = DoNothing
+    tracker_fulltext.UnindexIssues = DoNothing
+
+  def GetFirstAmendment(self, project_id, local_id):
+    issue = self.services.issue.GetIssueByLocalID(
+        self.cnxn, project_id, local_id)
+    issue_id = issue.issue_id
+    comments = self.services.issue.GetCommentsForIssue(self.cnxn, issue_id)
+    last_comment = comments[-1]
+    first_amendment = last_comment.amendments[0]
+    return first_amendment.field, first_amendment.newvalue
+
+  def testProcessFormData_BadUserField(self):
+    """Test PFD when a nonexistent user is added as a field value."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1]
+
+    fd = tracker_bizobj.MakeFieldDef(
+        12345, 789, 'PM', tracker_pb2.FieldTypes.USER_TYPE, None,
+        '', False, False, False, None, None, '', False, '', '',
+        tracker_pb2.NotifyTriggers.NEVER, 'no_action', 'doc', False)
+    self.config.field_defs.append(fd)
+
+    post_data = fake.PostData(
+        custom_12345=['ghost@gmail.com'], owner=['owner@example.com'], can=[1],
+        q=[''], colspec=[''], sort=[''], groupby=[''], start=[0], num=[100])
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertEqual('User not found.', mr.errors.custom_fields[0].message)
+
+  @mock.patch('framework.cloud_tasks_helpers.create_task')
+  def testProcessFormData_CustomFields(self, _create_task_mock):
+    """Test PFD processes edits to custom fields."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1]
+
+    fd = tracker_bizobj.MakeFieldDef(
+        12345, 789, 'CPU', tracker_pb2.FieldTypes.INT_TYPE, None,
+        '', False, False, False, None, None, '', False, '', '',
+        tracker_pb2.NotifyTriggers.NEVER, 'no_action', 'doc', False)
+    self.config.field_defs.append(fd)
+
+    post_data = fake.PostData(
+        custom_12345=['10'],
+        owner=['owner@example.com'],
+        can=[1],
+        q=[''],
+        colspec=[''],
+        sort=[''],
+        groupby=[''],
+        start=[0],
+        num=[100])
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertEqual(
+        (tracker_pb2.FieldID.CUSTOM, '10'),
+        self.GetFirstAmendment(789, local_id_1))
+
+  @mock.patch('framework.cloud_tasks_helpers.create_task')
+  def testProcessFormData_RestrictedCustomFieldsAccept(self, _create_task_mock):
+    """We accept edits to restricted fields by editors (or admins)."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.PermissionSet(
+            [
+                permissions.EDIT_ISSUE, permissions.ADD_ISSUE_COMMENT,
+                permissions.VIEW
+            ]),
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1]
+
+    fd = tracker_bizobj.MakeFieldDef(
+        12345,
+        789,
+        'CPU',
+        tracker_pb2.FieldTypes.INT_TYPE,
+        None,
+        '',
+        False,
+        False,
+        False,
+        None,
+        None,
+        '',
+        False,
+        '',
+        '',
+        tracker_pb2.NotifyTriggers.NEVER,
+        'no_action',
+        'doc',
+        False,
+        is_restricted_field=True)
+    fd.editor_ids = [111]
+    self.config.field_defs.append(fd)
+
+    post_data = fake.PostData(
+        custom_12345=['10'],
+        owner=['owner@example.com'],
+        can=[1],
+        q=[''],
+        colspec=[''],
+        sort=[''],
+        groupby=[''],
+        start=[0],
+        num=[100])
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertEqual(
+        (tracker_pb2.FieldID.CUSTOM, '10'),
+        self.GetFirstAmendment(789, local_id_1))
+
+  def testProcessFormData_RestrictedCustomFieldsReject(self):
+    """We reject edits to restricted fields by non-editors (and non-admins)."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.PermissionSet(
+            [
+                permissions.EDIT_ISSUE, permissions.ADD_ISSUE_COMMENT,
+                permissions.VIEW
+            ]),
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1]
+
+    fd_int = tracker_bizobj.MakeFieldDef(
+        11111,
+        789,
+        'fd_int',
+        tracker_pb2.FieldTypes.INT_TYPE,
+        None,
+        '',
+        False,
+        False,
+        False,
+        None,
+        None,
+        '',
+        False,
+        '',
+        '',
+        tracker_pb2.NotifyTriggers.NEVER,
+        'no_action',
+        'doc',
+        False,
+        is_restricted_field=True)
+    fd_enum = tracker_bizobj.MakeFieldDef(
+        44444,
+        789,
+        'fdEnum',
+        tracker_pb2.FieldTypes.ENUM_TYPE,
+        None,
+        '',
+        False,
+        False,
+        False,
+        None,
+        None,
+        '',
+        False,
+        '',
+        '',
+        tracker_pb2.NotifyTriggers.NEVER,
+        'no_action',
+        'doc',
+        False,
+        is_restricted_field=True)
+    fd_int.admin_ids = [222]
+    fd_enum.editor_ids = [333]
+    self.config.field_defs = [fd_int, fd_enum]
+
+    post_data_add_fv = fake.PostData(
+        custom_11111=['10'],
+        owner=['owner@example.com'],
+        can=[1],
+        q=[''],
+        colspec=[''],
+        sort=[''],
+        groupby=[''],
+        start=[0],
+        num=[100])
+    post_data_rm_fv = fake.PostData(
+        op_custom_11111=['remove'],
+        custom_11111=['10'],
+        owner=['owner@example.com'],
+        can=[1],
+        q=[''],
+        colspec=[''],
+        sort=[''],
+        groupby=[''],
+        start=[0],
+        num=[100])
+    post_data_clear_fd = fake.PostData(
+        op_custom_11111=['clear'],
+        owner=['owner@example.com'],
+        can=[1],
+        q=[''],
+        colspec=[''],
+        sort=[''],
+        groupby=[''],
+        start=[0],
+        num=[100])
+    post_data_label_edits_enum = fake.PostData(
+        label=['fdEnum-a'],
+        owner=['owner@example.com'],
+        can=[1],
+        q=[''],
+        colspec=[''],
+        sort=[''],
+        groupby=[''],
+        start=[0],
+        num=[100])
+    post_data_label_rm_enum = fake.PostData(
+        label=['-fdEnum-b'],
+        owner=['owner@example.com'],
+        can=[1],
+        q=[''],
+        colspec=[''],
+        sort=[''],
+        groupby=[''],
+        start=[0],
+        num=[100])
+
+    self._MockMethods()
+    self.assertRaises(
+        AssertionError, self.servlet.ProcessFormData, mr, post_data_add_fv)
+    self.assertRaises(
+        AssertionError, self.servlet.ProcessFormData, mr, post_data_rm_fv)
+    self.assertRaises(
+        AssertionError, self.servlet.ProcessFormData, mr, post_data_clear_fd)
+    self.assertRaises(
+        AssertionError, self.servlet.ProcessFormData, mr,
+        post_data_label_edits_enum)
+    self.assertRaises(
+        AssertionError, self.servlet.ProcessFormData, mr,
+        post_data_label_rm_enum)
+
+  def testProcessFormData_DuplicateStatus_MergeSameIssue(self):
+    """Test PFD processes null/cleared status values."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+
+    created_issue_2 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 112, reporter_id=112)
+    self.services.issue.TestAddIssue(created_issue_2)
+    merge_into_local_id_2 = created_issue_2.local_id
+
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1, merge_into_local_id_2]
+    mr.project_name = 'proj'
+
+    # Add required project_name to merge_into_issue.
+    merge_into_issue = self.services.issue.GetIssueByLocalID(
+        mr.cnxn, self.project.project_id, merge_into_local_id_2)
+    merge_into_issue.project_name = 'proj'
+
+    post_data = fake.PostData(status=['Duplicate'],
+        merge_into=[str(merge_into_local_id_2)], owner=['owner@example.com'],
+        can=[1], q=[''], colspec=[''], sort=[''], groupby=[''], start=[0],
+        num=[100])
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertEqual('Cannot merge issue into itself', mr.errors.merge_into_id)
+
+  def testProcessFormData_DuplicateStatus_MergeMissingIssue(self):
+    """Test PFD processes null/cleared status values."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    created_issue_2 = fake.MakeTestIssue(
+        789, 1, 'issue summary2', 'New', 112, reporter_id=112)
+    self.services.issue.TestAddIssue(created_issue_2)
+    local_id_2 = created_issue_2.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1, local_id_2]
+    mr.project_name = 'proj'
+
+    post_data = fake.PostData(status=['Duplicate'],
+        merge_into=['non existant id'], owner=['owner@example.com'],
+        can=[1], q=[''], colspec=[''], sort=[''], groupby=[''], start=[0],
+        num=[100])
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertEqual('Please enter an issue ID', mr.errors.merge_into_id)
+
+  @mock.patch('framework.cloud_tasks_helpers.create_task')
+  def testProcessFormData_DuplicateStatus_Success(self, _create_task_mock):
+    """Test PFD processes null/cleared status values."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    created_issue_2 = fake.MakeTestIssue(
+        789, 2, 'issue summary2', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_2)
+    local_id_2 = created_issue_2.local_id
+    created_issue_3 = fake.MakeTestIssue(
+        789, 3, 'issue summary3', 'New', 112, reporter_id=112)
+    self.services.issue.TestAddIssue(created_issue_3)
+    merge_into_local_id_3 = created_issue_3.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1, local_id_2]
+    mr.project_name = 'proj'
+
+    post_data = fake.PostData(status=['Duplicate'],
+        merge_into=[str(merge_into_local_id_3)], owner=['owner@example.com'],
+        can=[1], q=[''], colspec=[''], sort=[''], groupby=[''], start=[0],
+        num=[100])
+    self._MockMethods()
+
+    # Add project_name, CCs and starrers to the merge_into_issue.
+    merge_into_issue = self.services.issue.GetIssueByLocalID(
+        mr.cnxn, self.project.project_id, merge_into_local_id_3)
+    merge_into_issue.project_name = 'proj'
+    merge_into_issue.cc_ids = [113, 120]
+    self.services.issue_star.SetStar(
+        mr.cnxn, self.services, None, merge_into_issue.issue_id, 120, True)
+
+    # Add project_name, CCs and starrers to the source issues.
+    # Issue 1
+    issue_1 = self.services.issue.GetIssueByLocalID(
+        mr.cnxn, self.project.project_id, local_id_1)
+    issue_1.project_name = 'proj'
+    issue_1.cc_ids = [113, 114]
+    self.services.issue_star.SetStar(
+        mr.cnxn, self.services, None, issue_1.issue_id, 113, True)
+    # Issue 2
+    issue_2 = self.services.issue.GetIssueByLocalID(
+        mr.cnxn, self.project.project_id, local_id_2)
+    issue_2.project_name = 'proj'
+    issue_2.cc_ids = [113, 115, 118]
+    self.services.issue_star.SetStar(
+        mr.cnxn, self.services, None, issue_2.issue_id, 114, True)
+    self.services.issue_star.SetStar(
+        mr.cnxn, self.services, None, issue_2.issue_id, 115, True)
+
+    self.servlet.ProcessFormData(mr, post_data)
+
+    # Verify both source issues were updated.
+    self.assertEqual(
+        (tracker_pb2.FieldID.STATUS, 'Duplicate'),
+        self.GetFirstAmendment(self.project.project_id, local_id_1))
+    self.assertEqual(
+        (tracker_pb2.FieldID.STATUS, 'Duplicate'),
+        self.GetFirstAmendment(self.project.project_id, local_id_2))
+
+    # Verify that the merge into issue was updated with a comment.
+    comments = self.services.issue.GetCommentsForIssue(
+        self.cnxn, merge_into_issue.issue_id)
+    self.assertEqual(
+        'Issue 1 has been merged into this issue.\n'
+        'Issue 2 has been merged into this issue.', comments[-1].content)
+
+    # Verify CC lists and owner were merged to the merge_into issue.
+    self.assertEqual(
+            [113, 120, 114, 115, 118, 111], merge_into_issue.cc_ids)
+    # Verify new starrers were added to the merge_into issue.
+    self.assertEqual(4,
+                      self.services.issue_star.CountItemStars(
+                          self.cnxn, merge_into_issue.issue_id))
+    self.assertEqual([120, 113, 114, 115],
+                      self.services.issue_star.LookupItemStarrers(
+                          self.cnxn, merge_into_issue.issue_id))
+
+  @mock.patch('framework.cloud_tasks_helpers.create_task')
+  def testProcessFormData_ClearStatus(self, _create_task_mock):
+    """Test PFD processes null/cleared status values."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1]
+
+    post_data = fake.PostData(
+        op_statusenter=['clear'], owner=['owner@example.com'], can=[1],
+        q=[''], colspec=[''], sort=[''], groupby=[''], start=[0], num=[100])
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertEqual(
+        (tracker_pb2.FieldID.STATUS, ''), self.GetFirstAmendment(
+            789, local_id_1))
+
+  def testProcessFormData_InvalidOwner(self):
+    """Test PFD rejects invalid owner emails."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 0, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1]
+    post_data = fake.PostData(
+        owner=['invalid'])
+    self.servlet.response = Response()
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertTrue(mr.errors.AnyErrors())
+
+  @mock.patch('framework.cloud_tasks_helpers.create_task')
+  def testProcessFormData_MoveTo(self, _create_task_mock):
+    """Test PFD processes move_to values."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    move_to_project = self.services.project.TestAddProject(
+        name='proj2', project_id=790, owner_ids=[111])
+
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.project_name = 'proj'
+    mr.local_id_list = [local_id_1]
+
+    self._MockMethods()
+    post_data = fake.PostData(
+        move_to=['proj2'], can=[1], q=[''],
+        colspec=[''], sort=[''], groupby=[''], start=[0], num=[100])
+    self.servlet.response = Response()
+    self.servlet.ProcessFormData(mr, post_data)
+
+    issue = self.services.issue.GetIssueByLocalID(
+        self.cnxn, move_to_project.project_id, local_id_1)
+    self.assertIsNotNone(issue)
+
+  def testProcessFormData_InvalidBlockIssues(self):
+    """Test PFD processes invalid blocked_on and blocking values."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.project_name = 'proj'
+    mr.local_id_list = [local_id_1]
+
+    self._MockMethods()
+    post_data = fake.PostData(
+        op_blockedonenter=['append'], blocked_on=['12345'],
+        op_blockingenter=['append'], blocking=['54321'],
+        can=[1], q=[''],
+        colspec=[''], sort=[''], groupby=[''], start=[0], num=[100])
+    self.servlet.ProcessFormData(mr, post_data)
+
+    self.assertEqual('Invalid issue ID 12345', mr.errors.blocked_on)
+    self.assertEqual('Invalid issue ID 54321', mr.errors.blocking)
+
+  def testProcessFormData_BlockIssuesOnItself(self):
+    """Test PFD processes invalid blocked_on and blocking values."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+    created_issue_2 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_2)
+    local_id_2 = created_issue_2.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.project_name = 'proj'
+    mr.local_id_list = [local_id_1, local_id_2]
+
+    self._MockMethods()
+    post_data = fake.PostData(
+        op_blockedonenter=['append'], blocked_on=[str(local_id_1)],
+        op_blockingenter=['append'], blocking=[str(local_id_2)],
+        can=[1], q=[''],
+        colspec=[''], sort=[''], groupby=[''], start=[0], num=[100])
+    self.servlet.ProcessFormData(mr, post_data)
+
+    self.assertEqual('Cannot block an issue on itself.', mr.errors.blocked_on)
+    self.assertEqual('Cannot block an issue on itself.', mr.errors.blocking)
+
+  @mock.patch('framework.cloud_tasks_helpers.create_task')
+  def testProcessFormData_NormalBlockIssues(self, _create_task_mock):
+    """Test PFD processes blocked_on and blocking values."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+
+    created_issueid = fake.MakeTestIssue(
+        789, 2, 'blocking', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issueid)
+    blocking_id = created_issueid.local_id
+
+    created_issueid = fake.MakeTestIssue(
+        789, 3, 'blocked on', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issueid)
+    blocked_on_id = created_issueid.local_id
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.project_name = 'proj'
+    mr.local_id_list = [local_id_1]
+
+    self._MockMethods()
+    post_data = fake.PostData(
+        op_blockedonenter=['append'], blocked_on=[str(blocked_on_id)],
+        op_blockingenter=['append'], blocking=[str(blocking_id)],
+        can=[1], q=[''],
+        colspec=[''], sort=[''], groupby=[''], start=[0], num=[100])
+    self.servlet.ProcessFormData(mr, post_data)
+
+    self.assertIsNone(mr.errors.blocked_on)
+    self.assertIsNone(mr.errors.blocking)
+
+  def testProcessFormData_TooLongComment(self):
+    """Test PFD rejects comments that are too long."""
+    created_issue_1 = fake.MakeTestIssue(
+        789, 1, 'issue summary', 'New', 111, reporter_id=111)
+    self.services.issue.TestAddIssue(created_issue_1)
+    local_id_1 = created_issue_1.local_id
+
+    mr = testing_helpers.MakeMonorailRequest(
+        project=self.project,
+        perms=permissions.OWNER_ACTIVE_PERMISSIONSET,
+        user_info={'user_id': 111})
+    mr.local_id_list = [local_id_1]
+
+    post_data = fake.PostData(
+        owner=['owner@example.com'],
+        can=[1],
+        q=[''],
+        colspec=[''],
+        sort=[''],
+        groupby=[''],
+        start=[0],
+        num=[100],
+        comment=['   ' + 'c' * tracker_constants.MAX_COMMENT_CHARS + '  '])
+    self._MockMethods()
+    self.servlet.ProcessFormData(mr, post_data)
+    self.assertTrue(mr.errors.AnyErrors())
+    self.assertEqual('Comment is too long.', mr.errors.comment)