test(bundle): drive blunderbuss's ready_for_review skip, /auto-cc-on-issue, uncovered-file, no-candidate and refused-request arms through dist/index.js

__tests__/bundle/blunderbussArms.test.ts

@@ -0,0 +1,104 @@
+import type { FakeGithub } from './fakeGithub'
+import { Buffer } from 'node:buffer'
+import { afterAll, afterEach, beforeAll, describe, expect, it, vi } from 'vitest'
+
+import labelFileContents from '../fixtures/labels/labelFileContentsResp.json'
+import pullReqOpenedEvent from '../fixtures/pullReq/pullReqOpenedEvent.json'
+import { start } from './fakeGithub'
+import { comment, helpersFor, repo, token } from './helpers'
+import { runBundle } from './runBundle'
+
+vi.setConfig({ testTimeout: 30_000 })
+
+function yamlFile(text: string) {
+  const file = structuredClone(labelFileContents)
+  file.content = Buffer.from(text).toString('base64')
+  return file
+}
+
+// blunderbuss's remaining arms driven through dist/index.js: the `ready_for_review` skip when drafts are not
+// ignored, `/auto-cc` on a plain issue, a changed file no OWNERS covers, an empty candidate set, and a refused
+// reviewer request. The bundle suite runs the defaults and `blunderbussSettings.test.ts` the configured options.
+describe('dist/index.js blunderbuss arms', () => {
+  let gh: FakeGithub
+  const { routeOwners } = helpersFor(() => gh)
+
+  beforeAll(async () => {
+    gh = await start()
+  })
+  afterEach(() => gh.reset())
+  afterAll(() => gh.close())
+
+  function configure(section: string) {
+    gh.route('GET', '/repos/Codertocat/.project/contents/prow.yaml', { status: 200, body: yamlFile(`blunderbuss:\n${section}`) })
+  }
+
+  function requested() {
+    return gh.requestsMatching('POST', /\/pulls\/1\/requested_reviewers$/)
+  }
+
+  it('ready_for_review is skipped when ignore_drafts is false, since opened already ran', async () => {
+    configure('  ignore_drafts: false\n')
+    routeOwners({ 'sdk/OWNERS': 'reviewers:\n- bob\n' }, ['sdk/x.go'])
+
+    const result = await runBundle({
+      eventName: 'pull_request',
+      payload: { ...pullReqOpenedEvent, action: 'ready_for_review' },
+      inputs: token,
+      apiUrl: gh.url,
+    })
+
+    expect(result.status, result.stdout).toBe(0)
+    expect(result.errors).toEqual([])
+    expect(result.stdout).toContain('blunderbuss: skipping ready_for_review action')
+    expect(requested()).toEqual([])
+  })
+
+  it('/auto-cc on an issue that is not a pull request does nothing', async () => {
+    const result = await runBundle({
+      eventName: 'issue_comment',
+      payload: comment('/auto-cc'),
+      inputs: { ...token, 'prow-commands': '/auto-cc' },
+      apiUrl: gh.url,
+    })
+
+    expect(result.status, result.stdout).toBe(0)
+    expect(result.errors).toEqual([])
+    expect(result.stdout).toContain('blunderbuss: /auto-cc only applies to pull requests')
+    expect(gh.requestsMatching('GET', /\/pulls\/1$/)).toEqual([])
+    expect(requested()).toEqual([])
+  })
+
+  it('a changed file that no OWNERS file covers adds no candidates', async () => {
+    routeOwners({ 'sdk/OWNERS': 'reviewers:\n- bob\n' }, ['sdk/x.go', 'README.md'])
+    gh.route('POST', `${repo}/pulls/1/requested_reviewers`, { status: 201, body: {} })
+
+    const result = await runBundle({ eventName: 'pull_request', payload: pullReqOpenedEvent, inputs: token, apiUrl: gh.url })
+
+    expect(result.status, result.stdout).toBe(0)
+    expect(result.errors).toEqual([])
+    expect(requested().map(r => r.body)).toEqual([{ reviewers: ['bob'] }])
+  })
+
+  it('requests nobody when the only reviewer is the author', async () => {
+    routeOwners({ OWNERS: 'reviewers:\n- alice\n' }, ['x.go'], { user: { login: 'alice' } })
+
+    const result = await runBundle({ eventName: 'pull_request', payload: pullReqOpenedEvent, inputs: token, apiUrl: gh.url })
+
+    expect(result.status, result.stdout).toBe(0)
+    expect(result.errors).toEqual([])
+    expect(result.stdout).toContain('blunderbuss: no reviewer candidates for #1')
+    expect(requested()).toEqual([])
+  })
+
+  it('fails the run when the reviewer request is refused', async () => {
+    routeOwners({ OWNERS: 'reviewers:\n- bob\n' }, ['x.go'])
+    gh.route('POST', `${repo}/pulls/1/requested_reviewers`, { status: 500, body: { message: 'boom' } })
+
+    const result = await runBundle({ eventName: 'pull_request', payload: pullReqOpenedEvent, inputs: token, apiUrl: gh.url })
+
+    expect(result.status, result.stdout).toBe(1)
+    expect(requested()).toHaveLength(1)
+    expect(result.errors.join('\n')).toContain('could not request reviewers')
+  })
+})