# Copyright 2019 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Tests for features.pubsub."""

from __future__ import print_function
from __future__ import division
from __future__ import absolute_import

import unittest

from mock import Mock

from features import pubsub
from services import service_manager
from testing import fake
from testing import testing_helpers


class PublishPubsubIssueChangeTaskTest(unittest.TestCase):

  def setUp(self):
    self.services = service_manager.Services(
        user=fake.UserService(),
        project=fake.ProjectService(),
        config=fake.ConfigService(),
        issue=fake.IssueService(),
        features=fake.FeaturesService())
    self.services.project.TestAddProject(
        'test-project', owner_ids=[1, 3],
        project_id=12345)

    # Stub the pubsub API (there is no pubsub testbed stub).
    self.pubsub_client_mock = Mock()
    pubsub.set_up_pubsub_api = Mock(return_value=self.pubsub_client_mock)

  def testPublishPubsubIssueChangeTask_NoIssueIdParam(self):
    """Test case when issue_id param is not passed."""
    task = pubsub.PublishPubsubIssueChangeTask(services=self.services)
    mr = testing_helpers.MakeMonorailRequest(
        user_info={'user_id': 1},
        params={},
        method='POST',
        services=self.services)
    result = task.HandleRequest(mr)
    expected_body = {
      'error': 'Cannot proceed without a valid issue ID.',
    }
    self.assertEqual(result, expected_body)

  def testPublishPubsubIssueChangeTask_PubSubAPIInitFailure(self):
    """Test case when pub/sub API fails to init."""
    pubsub.set_up_pubsub_api = Mock(return_value=None)
    task = pubsub.PublishPubsubIssueChangeTask(services=self.services)
    mr = testing_helpers.MakeMonorailRequest(
        user_info={'user_id': 1},
        params={},
        method='POST',
        services=self.services)
    result = task.HandleRequest(mr)
    expected_body = {
      'error': 'Pub/Sub API init failure.',
    }
    self.assertEqual(result, expected_body)

  def testPublishPubsubIssueChangeTask_IssueNotFound(self):
    """Test case when issue is not found."""
    task = pubsub.PublishPubsubIssueChangeTask(services=self.services)
    mr = testing_helpers.MakeMonorailRequest(
        user_info={'user_id': 1},
        params={'issue_id': 314159},
        method='POST',
        services=self.services)
    result = task.HandleRequest(mr)
    expected_body = {
      'error': 'Could not find issue with ID 314159',
    }
    self.assertEqual(result, expected_body)

  def testPublishPubsubIssueChangeTask_Normal(self):
    """Test normal happy-path case."""
    issue = fake.MakeTestIssue(789, 543, 'sum', 'New', 111, issue_id=78901,
        project_name='rutabaga')
    self.services.issue.TestAddIssue(issue)
    task = pubsub.PublishPubsubIssueChangeTask(services=self.services)
    mr = testing_helpers.MakeMonorailRequest(
        user_info={'user_id': 1},
        params={'issue_id': 78901},
        method='POST',
        services=self.services)
    result = task.HandleRequest(mr)

    self.pubsub_client_mock.projects().topics().publish.assert_called_once_with(
      topic='projects/testing-app/topics/issue-updates',
      body={
        'messages': [{
          'attributes': {
            'local_id': '543',
            'project_name': 'rutabaga',
          },
        }],
      }
    )
    self.assertEqual(result, {})