tests/unit/test_github_driver.py

# Copyright 2015 GoodData
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import os
import re
from testtools.matchers import MatchesRegex, StartsWith
import urllib
import time

import git

from tests.base import ZuulTestCase, simple_layout, random_sha1


class TestGithubDriver(ZuulTestCase):
    config_file = 'zuul-github-driver.conf'

    @simple_layout('layouts/basic-github.yaml', driver='github')
    def test_pull_event(self):
        self.executor_server.hold_jobs_in_build = True

        A = self.fake_github.openFakePullRequest('org/project', 'master', 'A')
        self.fake_github.emitEvent(A.getPullRequestOpenedEvent())
        self.waitUntilSettled()

        build_params = self.builds[0].parameters
        self.assertEqual('master', build_params['ZUUL_BRANCH'])
        self.assertEqual(str(A.number), build_params['ZUUL_CHANGE'])
        self.assertEqual(A.head_sha, build_params['ZUUL_PATCHSET'])

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()

        self.assertEqual('SUCCESS',
                         self.getJobFromHistory('project-test1').result)
        self.assertEqual('SUCCESS',
                         self.getJobFromHistory('project-test2').result)

        job = self.getJobFromHistory('project-test2')
        zuulvars = job.parameters['zuul']
        self.assertEqual(A.number, zuulvars['change'])
        self.assertEqual(A.head_sha, zuulvars['patchset'])
        self.assertEqual(1, len(A.comments))
        self.assertEqual(2, len(self.history))

        # test_pull_unmatched_branch_event(self):
        self.create_branch('org/project', 'unmatched_branch')
        B = self.fake_github.openFakePullRequest(
            'org/project', 'unmatched_branch', 'B')
        self.fake_github.emitEvent(B.getPullRequestOpenedEvent())
        self.waitUntilSettled()

        self.assertEqual(2, len(self.history))

    @simple_layout('layouts/files-github.yaml', driver='github')
    def test_pull_matched_file_event(self):
        A = self.fake_github.openFakePullRequest(
            'org/project', 'master', 'A',
            files=['random.txt', 'build-requires'])
        self.fake_github.emitEvent(A.getPullRequestOpenedEvent())
        self.waitUntilSettled()
        self.assertEqual(1, len(self.history))

        # test_pull_unmatched_file_event
        B = self.fake_github.openFakePullRequest('org/project', 'master', 'B',
                                                 files=['random.txt'])
        self.fake_github.emitEvent(B.getPullRequestOpenedEvent())
        self.waitUntilSettled()
        self.assertEqual(1, len(self.history))

    @simple_layout('layouts/basic-github.yaml', driver='github')
    def test_comment_event(self):
        A = self.fake_github.openFakePullRequest('org/project', 'master', 'A')
        self.fake_github.emitEvent(A.getCommentAddedEvent('test me'))
        self.waitUntilSettled()
        self.assertEqual(2, len(self.history))

        # Test an unmatched comment, history should remain the same
        B = self.fake_github.openFakePullRequest('org/project', 'master', 'B')
        self.fake_github.emitEvent(B.getCommentAddedEvent('casual comment'))
        self.waitUntilSettled()
        self.assertEqual(2, len(self.history))

    @simple_layout('layouts/push-tag-github.yaml', driver='github')
    def test_tag_event(self):
        self.executor_server.hold_jobs_in_build = True

        self.create_branch('org/project', 'tagbranch')
        files = {'README.txt': 'test'}
        self.addCommitToRepo('org/project', 'test tag',
                             files, branch='tagbranch', tag='newtag')
        path = os.path.join(self.upstream_root, 'org/project')
        repo = git.Repo(path)
        tag = repo.tags['newtag']
        sha = tag.commit.hexsha
        del repo

        self.fake_github.emitEvent(
            self.fake_github.getPushEvent('org/project', 'refs/tags/newtag',
                                          new_rev=sha))
        self.waitUntilSettled()

        build_params = self.builds[0].parameters
        self.assertEqual('refs/tags/newtag', build_params['ZUUL_REF'])
        self.assertEqual('00000000000000000000000000000000',
                         build_params['zuul']['oldrev'])
        self.assertEqual(sha, build_params['zuul']['newrev'])

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()

        self.assertEqual('SUCCESS',
                         self.getJobFromHistory('project-tag').result)

    @simple_layout('layouts/push-tag-github.yaml', driver='github')
    def test_push_event(self):
        self.executor_server.hold_jobs_in_build = True

        old_sha = random_sha1()
        new_sha = random_sha1()
        self.fake_github.emitEvent(
            self.fake_github.getPushEvent('org/project', 'refs/heads/master',
                                          old_sha, new_sha))
        self.waitUntilSettled()

        build_params = self.builds[0].parameters
        self.assertEqual('refs/heads/master', build_params['ZUUL_REF'])
        self.assertEqual(old_sha, build_params['zuul']['oldrev'])
        self.assertEqual(new_sha, build_params['zuul']['newrev'])

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()

        self.assertEqual('SUCCESS',
                         self.getJobFromHistory('project-post').result)
        self.assertEqual(1, len(self.history))

        # test unmatched push event
        old_sha = random_sha1()
        new_sha = random_sha1()
        self.fake_github.emitEvent(
            self.fake_github.getPushEvent('org/project',
                                          'refs/heads/unmatched_branch',
                                          old_sha, new_sha))
        self.waitUntilSettled()

        self.assertEqual(1, len(self.history))

    @simple_layout('layouts/labeling-github.yaml', driver='github')
    def test_labels(self):
        A = self.fake_github.openFakePullRequest('org/project', 'master', 'A')
        self.fake_github.emitEvent(A.addLabel('test'))
        self.waitUntilSettled()
        self.assertEqual(1, len(self.history))
        self.assertEqual('project-labels', self.history[0].name)
        self.assertEqual(['tests passed'], A.labels)

        # test label removed
        B = self.fake_github.openFakePullRequest('org/project', 'master', 'B')
        B.addLabel('do not test')
        self.fake_github.emitEvent(B.removeLabel('do not test'))
        self.waitUntilSettled()
        self.assertEqual(2, len(self.history))
        self.assertEqual('project-labels', self.history[1].name)
        self.assertEqual(['tests passed'], B.labels)

        # test unmatched label
        C = self.fake_github.openFakePullRequest('org/project', 'master', 'C')
        self.fake_github.emitEvent(C.addLabel('other label'))
        self.waitUntilSettled()
        self.assertEqual(2, len(self.history))
        self.assertEqual(['other label'], C.labels)

    @simple_layout('layouts/reviews-github.yaml', driver='github')
    def test_review_event(self):
        A = self.fake_github.openFakePullRequest('org/project', 'master', 'A')
        self.fake_github.emitEvent(A.getReviewAddedEvent('approve'))
        self.waitUntilSettled()
        self.assertEqual(1, len(self.history))
        self.assertEqual('project-reviews', self.history[0].name)
        self.assertEqual(['tests passed'], A.labels)

        # test_review_unmatched_event
        B = self.fake_github.openFakePullRequest('org/project', 'master', 'B')
        self.fake_github.emitEvent(B.getReviewAddedEvent('comment'))
        self.waitUntilSettled()
        self.assertEqual(1, len(self.history))

    @simple_layout('layouts/dequeue-github.yaml', driver='github')
    def test_dequeue_pull_synchronized(self):
        self.executor_server.hold_jobs_in_build = True

        A = self.fake_github.openFakePullRequest(
            'org/one-job-project', 'master', 'A')
        self.fake_github.emitEvent(A.getPullRequestOpenedEvent())
        self.waitUntilSettled()

        # event update stamp has resolution one second, wait so the latter
        # one has newer timestamp
        time.sleep(1)
        A.addCommit()
        self.fake_github.emitEvent(A.getPullRequestSynchronizeEvent())
        self.waitUntilSettled()

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()

        self.assertEqual(2, len(self.history))
        self.assertEqual(1, self.countJobResults(self.history, 'ABORTED'))

    @simple_layout('layouts/dequeue-github.yaml', driver='github')
    def test_dequeue_pull_abandoned(self):
        self.executor_server.hold_jobs_in_build = True

        A = self.fake_github.openFakePullRequest(
            'org/one-job-project', 'master', 'A')
        self.fake_github.emitEvent(A.getPullRequestOpenedEvent())
        self.waitUntilSettled()
        self.fake_github.emitEvent(A.getPullRequestClosedEvent())
        self.waitUntilSettled()

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()

        self.assertEqual(1, len(self.history))
        self.assertEqual(1, self.countJobResults(self.history, 'ABORTED'))

    @simple_layout('layouts/basic-github.yaml', driver='github')
    def test_git_https_url(self):
        """Test that git_ssh option gives git url with ssh"""
        url = self.fake_github.real_getGitUrl('org/project')
        self.assertEqual('https://github.com/org/project', url)

    @simple_layout('layouts/basic-github.yaml', driver='github')
    def test_git_ssh_url(self):
        """Test that git_ssh option gives git url with ssh"""
        url = self.fake_github_ssh.real_getGitUrl('org/project')
        self.assertEqual('ssh://git@github.com/org/project.git', url)

    @simple_layout('layouts/basic-github.yaml', driver='github')
    def test_git_enterprise_url(self):
        """Test that git_url option gives git url with proper host"""
        url = self.fake_github_ent.real_getGitUrl('org/project')
        self.assertEqual('ssh://git@github.enterprise.io/org/project.git', url)

    @simple_layout('layouts/reporting-github.yaml', driver='github')
    def test_reporting(self):
        project = 'org/project'
        # pipeline reports pull status both on start and success
        self.executor_server.hold_jobs_in_build = True
        A = self.fake_github.openFakePullRequest(project, 'master', 'A')
        self.fake_github.emitEvent(A.getPullRequestOpenedEvent())
        self.waitUntilSettled()
        # We should have a status container for the head sha
        statuses = self.fake_github.statuses[project][A.head_sha]
        self.assertIn(A.head_sha, self.fake_github.statuses[project].keys())
        # We should only have one status for the head sha
        self.assertEqual(1, len(statuses))
        check_status = statuses[0]
        check_url = ('http://zuul.example.com/status/#%s,%s' %
                     (A.number, A.head_sha))
        self.assertEqual('tenant-one/check', check_status['context'])
        self.assertEqual('Standard check', check_status['description'])
        self.assertEqual('pending', check_status['state'])
        self.assertEqual(check_url, check_status['url'])
        self.assertEqual(0, len(A.comments))

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()
        # We should only have two statuses for the head sha
        statuses = self.fake_github.statuses[project][A.head_sha]
        self.assertEqual(2, len(statuses))
        check_status = statuses[0]
        check_url = ('http://zuul.example.com/status/#%s,%s' %
                     (A.number, A.head_sha))
        self.assertEqual('tenant-one/check', check_status['context'])
        self.assertEqual('success', check_status['state'])
        self.assertEqual(check_url, check_status['url'])
        self.assertEqual(1, len(A.comments))
        self.assertThat(A.comments[0],
                        MatchesRegex('.*Build succeeded.*', re.DOTALL))

        # pipeline does not report any status but does comment
        self.executor_server.hold_jobs_in_build = True
        self.fake_github.emitEvent(
            A.getCommentAddedEvent('reporting check'))
        self.waitUntilSettled()
        statuses = self.fake_github.statuses[project][A.head_sha]
        self.assertEqual(2, len(statuses))
        # comments increased by one for the start message
        self.assertEqual(2, len(A.comments))
        self.assertThat(A.comments[1],
                        MatchesRegex('.*Starting reporting jobs.*', re.DOTALL))
        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()
        # pipeline reports success status
        statuses = self.fake_github.statuses[project][A.head_sha]
        self.assertEqual(3, len(statuses))
        report_status = statuses[0]
        self.assertEqual('tenant-one/reporting', report_status['context'])
        self.assertEqual('success', report_status['state'])
        self.assertEqual(2, len(A.comments))

        base = 'http://logs.example.com/tenant-one/reporting/%s/%s/' % (
            A.project, A.number)

        # Deconstructing the URL because we don't save the BuildSet UUID
        # anywhere to do a direct comparison and doing regexp matches on a full
        # URL is painful.

        # The first part of the URL matches the easy base string
        self.assertThat(report_status['url'], StartsWith(base))

        # The rest of the URL is a UUID and a trailing slash.
        self.assertThat(report_status['url'][len(base):],
                        MatchesRegex('^[a-fA-F0-9]{32}\/$'))

    @simple_layout('layouts/reporting-github.yaml', driver='github')
    def test_push_reporting(self):
        project = 'org/project2'
        # pipeline reports pull status both on start and success
        self.executor_server.hold_jobs_in_build = True
        pevent = self.fake_github.getPushEvent(project=project,
                                               ref='refs/heads/master')

        self.fake_github.emitEvent(pevent)
        self.waitUntilSettled()

        # there should only be one report, a status
        self.assertEqual(1, len(self.fake_github.reports))
        # Verify the user/context/state of the status
        status = ('zuul', 'tenant-one/push-reporting', 'pending')
        self.assertEqual(status, self.fake_github.reports[0][-1])

        # free the executor, allow the build to finish
        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()

        # Now there should be a second report, the success of the build
        self.assertEqual(2, len(self.fake_github.reports))
        # Verify the user/context/state of the status
        status = ('zuul', 'tenant-one/push-reporting', 'success')
        self.assertEqual(status, self.fake_github.reports[-1][-1])

        # now make a PR which should also comment
        self.executor_server.hold_jobs_in_build = True
        A = self.fake_github.openFakePullRequest(project, 'master', 'A')
        self.fake_github.emitEvent(A.getPullRequestOpenedEvent())
        self.waitUntilSettled()

        # Now there should be a four reports, a new comment
        # and status
        self.assertEqual(4, len(self.fake_github.reports))
        self.executor_server.release()
        self.waitUntilSettled()

    @simple_layout('layouts/merging-github.yaml', driver='github')
    def test_report_pull_merge(self):
        # pipeline merges the pull request on success
        A = self.fake_github.openFakePullRequest('org/project', 'master',
                                                 'PR title')
        self.fake_github.emitEvent(A.getCommentAddedEvent('merge me'))
        self.waitUntilSettled()
        self.assertTrue(A.is_merged)
        self.assertThat(A.merge_message,
                        MatchesRegex('.*PR title.*Reviewed-by.*', re.DOTALL))

        # pipeline merges the pull request on success after failure
        self.fake_github.merge_failure = True
        B = self.fake_github.openFakePullRequest('org/project', 'master', 'B')
        self.fake_github.emitEvent(B.getCommentAddedEvent('merge me'))
        self.waitUntilSettled()
        self.assertFalse(B.is_merged)
        self.fake_github.merge_failure = False

        # pipeline merges the pull request on second run of merge
        # first merge failed on 405 Method Not Allowed error
        self.fake_github.merge_not_allowed_count = 1
        C = self.fake_github.openFakePullRequest('org/project', 'master', 'C')
        self.fake_github.emitEvent(C.getCommentAddedEvent('merge me'))
        self.waitUntilSettled()
        self.assertTrue(C.is_merged)

        # pipeline does not merge the pull request
        # merge failed on 405 Method Not Allowed error - twice
        self.fake_github.merge_not_allowed_count = 2
        D = self.fake_github.openFakePullRequest('org/project', 'master', 'D')
        self.fake_github.emitEvent(D.getCommentAddedEvent('merge me'))
        self.waitUntilSettled()
        self.assertFalse(D.is_merged)
        self.assertEqual(len(D.comments), 1)
        self.assertEqual(D.comments[0], 'Merge failed')

    @simple_layout('layouts/dependent-github.yaml', driver='github')
    def test_parallel_changes(self):
        "Test that changes are tested in parallel and merged in series"

        self.executor_server.hold_jobs_in_build = True
        A = self.fake_github.openFakePullRequest('org/project', 'master', 'A')
        B = self.fake_github.openFakePullRequest('org/project', 'master', 'B')
        C = self.fake_github.openFakePullRequest('org/project', 'master', 'C')

        self.fake_github.emitEvent(A.addLabel('merge'))
        self.fake_github.emitEvent(B.addLabel('merge'))
        self.fake_github.emitEvent(C.addLabel('merge'))

        self.waitUntilSettled()
        self.assertEqual(len(self.builds), 1)
        self.assertEqual(self.builds[0].name, 'project-merge')
        self.assertTrue(self.builds[0].hasChanges(A))

        self.executor_server.release('.*-merge')
        self.waitUntilSettled()
        self.assertEqual(len(self.builds), 3)
        self.assertEqual(self.builds[0].name, 'project-test1')
        self.assertTrue(self.builds[0].hasChanges(A))
        self.assertEqual(self.builds[1].name, 'project-test2')
        self.assertTrue(self.builds[1].hasChanges(A))
        self.assertEqual(self.builds[2].name, 'project-merge')
        self.assertTrue(self.builds[2].hasChanges(A, B))

        self.executor_server.release('.*-merge')
        self.waitUntilSettled()
        self.assertEqual(len(self.builds), 5)
        self.assertEqual(self.builds[0].name, 'project-test1')
        self.assertTrue(self.builds[0].hasChanges(A))
        self.assertEqual(self.builds[1].name, 'project-test2')
        self.assertTrue(self.builds[1].hasChanges(A))

        self.assertEqual(self.builds[2].name, 'project-test1')
        self.assertTrue(self.builds[2].hasChanges(A))
        self.assertEqual(self.builds[3].name, 'project-test2')
        self.assertTrue(self.builds[3].hasChanges(A, B))

        self.assertEqual(self.builds[4].name, 'project-merge')
        self.assertTrue(self.builds[4].hasChanges(A, B, C))

        self.executor_server.release('.*-merge')
        self.waitUntilSettled()
        self.assertEqual(len(self.builds), 6)
        self.assertEqual(self.builds[0].name, 'project-test1')
        self.assertTrue(self.builds[0].hasChanges(A))
        self.assertEqual(self.builds[1].name, 'project-test2')
        self.assertTrue(self.builds[1].hasChanges(A))

        self.assertEqual(self.builds[2].name, 'project-test1')
        self.assertTrue(self.builds[2].hasChanges(A, B))
        self.assertEqual(self.builds[3].name, 'project-test2')
        self.assertTrue(self.builds[3].hasChanges(A, B))

        self.assertEqual(self.builds[4].name, 'project-test1')
        self.assertTrue(self.builds[4].hasChanges(A, B, C))
        self.assertEqual(self.builds[5].name, 'project-test2')
        self.assertTrue(self.builds[5].hasChanges(A, B, C))

        all_builds = self.builds[:]
        self.release(all_builds[2])
        self.release(all_builds[3])
        self.waitUntilSettled()
        self.assertFalse(A.is_merged)
        self.assertFalse(B.is_merged)
        self.assertFalse(C.is_merged)

        self.release(all_builds[0])
        self.release(all_builds[1])
        self.waitUntilSettled()
        self.assertTrue(A.is_merged)
        self.assertTrue(B.is_merged)
        self.assertFalse(C.is_merged)

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()
        self.assertEqual(len(self.builds), 0)
        self.assertEqual(len(self.history), 9)
        self.assertTrue(C.is_merged)

        self.assertNotIn('merge', A.labels)
        self.assertNotIn('merge', B.labels)
        self.assertNotIn('merge', C.labels)

    @simple_layout('layouts/dependent-github.yaml', driver='github')
    def test_failed_changes(self):
        "Test that a change behind a failed change is retested"
        self.executor_server.hold_jobs_in_build = True

        A = self.fake_github.openFakePullRequest('org/project', 'master', 'A')
        B = self.fake_github.openFakePullRequest('org/project', 'master', 'B')

        self.executor_server.failJob('project-test1', A)

        self.fake_github.emitEvent(A.addLabel('merge'))
        self.fake_github.emitEvent(B.addLabel('merge'))
        self.waitUntilSettled()

        self.executor_server.release('.*-merge')
        self.waitUntilSettled()

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()

        self.waitUntilSettled()
        # It's certain that the merge job for change 2 will run, but
        # the test1 and test2 jobs may or may not run.
        self.assertTrue(len(self.history) > 6)
        self.assertFalse(A.is_merged)
        self.assertTrue(B.is_merged)
        self.assertNotIn('merge', A.labels)
        self.assertNotIn('merge', B.labels)

    @simple_layout('layouts/dependent-github.yaml', driver='github')
    def test_failed_change_at_head(self):
        "Test that if a change at the head fails, jobs behind it are canceled"

        self.executor_server.hold_jobs_in_build = True
        A = self.fake_github.openFakePullRequest('org/project', 'master', 'A')
        B = self.fake_github.openFakePullRequest('org/project', 'master', 'B')
        C = self.fake_github.openFakePullRequest('org/project', 'master', 'C')

        self.executor_server.failJob('project-test1', A)

        self.fake_github.emitEvent(A.addLabel('merge'))
        self.fake_github.emitEvent(B.addLabel('merge'))
        self.fake_github.emitEvent(C.addLabel('merge'))

        self.waitUntilSettled()

        self.assertEqual(len(self.builds), 1)
        self.assertEqual(self.builds[0].name, 'project-merge')
        self.assertTrue(self.builds[0].hasChanges(A))

        self.executor_server.release('.*-merge')
        self.waitUntilSettled()
        self.executor_server.release('.*-merge')
        self.waitUntilSettled()
        self.executor_server.release('.*-merge')
        self.waitUntilSettled()

        self.assertEqual(len(self.builds), 6)
        self.assertEqual(self.builds[0].name, 'project-test1')
        self.assertEqual(self.builds[1].name, 'project-test2')
        self.assertEqual(self.builds[2].name, 'project-test1')
        self.assertEqual(self.builds[3].name, 'project-test2')
        self.assertEqual(self.builds[4].name, 'project-test1')
        self.assertEqual(self.builds[5].name, 'project-test2')

        self.release(self.builds[0])
        self.waitUntilSettled()

        # project-test2, project-merge for B
        self.assertEqual(len(self.builds), 2)
        self.assertEqual(self.countJobResults(self.history, 'ABORTED'), 4)

        self.executor_server.hold_jobs_in_build = False
        self.executor_server.release()
        self.waitUntilSettled()

        self.assertEqual(len(self.builds), 0)
        self.assertEqual(len(self.history), 15)
        self.assertFalse(A.is_merged)
        self.assertTrue(B.is_merged)
        self.assertTrue(C.is_merged)
        self.assertNotIn('merge', A.labels)
        self.assertNotIn('merge', B.labels)
        self.assertNotIn('merge', C.labels)

    @simple_layout('layouts/basic-github.yaml', driver='github')
    def test_push_event_reconfigure(self):
        pevent = self.fake_github.getPushEvent(project='common-config',
                                               ref='refs/heads/master',
                                               modified_files=['zuul.yaml'])

        # record previous tenant reconfiguration time, which may not be set
        old = self.sched.tenant_last_reconfigured.get('tenant-one', 0)
        time.sleep(1)
        self.fake_github.emitEvent(pevent)
        self.waitUntilSettled()
        new = self.sched.tenant_last_reconfigured.get('tenant-one', 0)
        # New timestamp should be greater than the old timestamp
        self.assertLess(old, new)

    @simple_layout('layouts/basic-github.yaml', driver='github')
    def test_ping_event(self):
        # Test valid ping
        pevent = {'repository': {'full_name': 'org/project'}}
        req = self.fake_github.emitEvent(('ping', pevent))
        self.assertEqual(req.status, 200, "Ping event didn't succeed")

        # Test invalid ping
        pevent = {'repository': {'full_name': 'unknown-project'}}
        self.assertRaises(
            urllib.error.HTTPError,
            self.fake_github.emitEvent,
            ('ping', pevent),
        )