ci: adding simple workflow

.eslintignore

@@ -1,2 +1,3 @@
 *.js
+*.txt
 !/.github

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+
+      - name: Setup node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: '12.x'
+
+      - name: Install dependencies
+        run: |
+          npm ci
+
+      - name: Lint code
+        run: |
+          npm run lint
+
+      - name: Run tests
+        run: |
+          npm test

__tests__/add-pr-comment.test.ts

@@ -1,18 +1,33 @@
+import * as fs from 'fs'
+import * as path from 'path'
 import * as core from '@actions/core'
 import * as github from '@actions/github'
 import {WebhookPayload} from '@actions/github/lib/interfaces'
+import nock from 'nock'
 import run from '../add-pr-comment'
 
+const repoFullName = 'foo/bar'
+const repoToken = '12345'
+const simpleMessage = 'hello world'
+const multilineMessage = fs.readFileSync(path.resolve(__dirname, './message-windows.txt')).toString()
+const multilineMessageWindows = fs.readFileSync(path.resolve(__dirname, './message-windows.txt')).toString()
+
+const inputs = {
+  message: '',
+  'repo-token': '',
+  'allow-repeats': 'false',
+}
+
 beforeEach(() => {
   jest.resetModules()
   jest.spyOn(core, 'getInput').mockImplementation((name: string): string => {
     switch (name) {
       case 'message':
-        return 'hello world'
+        return inputs.message
       case 'repo-token':
-        return '12345'
+        return inputs['repo-token']
       case 'allow-repeats':
-        return 'false'
+        return inputs['allow-repeats']
       default:
         return ''
     }
@@ -20,22 +35,107 @@ beforeEach(() => {
 
   // https://developer.github.com/webhooks/event-payloads/#issues
   github.context.payload = {
-    action: 'created',
-    issue: {
+    pull_request: {
       number: 1,
     },
-    comment: {
-      id: 1,
-      user: {
-        login: 'monalisa',
+    repository: {
+      full_name: repoFullName,
+      name: 'bar',
+      owner: {
+        login: 'bar',
       },
-      body: 'Honk',
     },
+    sha: 'abc123',
   } as WebhookPayload
 })
 
+afterEach(() => {
+  jest.restoreAllMocks()
+  expect(nock.pendingMocks()).toEqual([])
+  nock.isDone()
+  nock.cleanAll()
+})
+
 describe('add-pr-comment action', () => {
-  it('runs', async () => {
+  it('creates a comment', async () => {
+    inputs.message = simpleMessage
+    inputs['repo-token'] = repoToken
+    inputs['allow-repeats'] = 'true'
+
+    const originalSetOutput = core.setOutput
+
+    jest.spyOn(core, 'setOutput').mockImplementation((key: string, value: string): void => {
+      if (key === 'comment-created') {
+        expect(value).toBe('true')
+      }
+
+      return originalSetOutput(key, value)
+    })
+
+    nock('https://api.github.com')
+      .post(`/repos/${repoFullName}/issues/1/comments`, ({body}) => body === simpleMessage)
+      .reply(200, {
+        url: 'https://github.com/#example',
+      })
+
     await expect(run()).resolves.not.toThrow()
   })
+
+  it('identifies repeat messages and does not create a comment', async () => {
+    inputs.message = simpleMessage
+    inputs['repo-token'] = repoToken
+    inputs['allow-repeats'] = 'false'
+
+    const originalSetOutput = core.setOutput
+
+    jest.spyOn(core, 'setOutput').mockImplementation((key: string, value: string): void => {
+      if (key === 'comment-created') {
+        expect(value).toBe('false')
+      }
+
+      return originalSetOutput(key, value)
+    })
+
+    nock('https://api.github.com')
+      .get(`/repos/${repoFullName}/issues/1/comments`)
+      .reply(200, [
+        {
+          body: simpleMessage,
+          user: {
+            login: 'github-actions[bot]',
+          },
+        },
+      ])
+
+    await run()
+  })
+
+  it('matches multiline messages with windows line feeds against api responses with unix linefeeds', async () => {
+    inputs.message = multilineMessageWindows
+    inputs['repo-token'] = repoToken
+    inputs['allow-repeats'] = 'false'
+
+    const originalSetOutput = core.setOutput
+
+    jest.spyOn(core, 'setOutput').mockImplementation((key: string, value: string): void => {
+      if (key === 'comment-created') {
+        expect(value).toBe('false')
+      }
+
+      return originalSetOutput(key, value)
+    })
+
+    nock('https://api.github.com')
+      .get(`/repos/${repoFullName}/issues/1/comments`)
+      .reply(200, [
+        {
+          body: multilineMessage,
+          user: {
+            login: 'github-actions[bot]',
+          },
+        },
+      ])
+
+    await run()
+  })
 })

__tests__/message-windows.txt

@@ -0,0 +1,7 @@
+## [Preview link](https://antares-blog-staging-pr-${{ github.event.number }}.azurewebsites.net)
+
+- Your changes have been deployed to the preview site. The preview site will update as you add more commits to this branch.
+- The preview site shows any future-dated articles. Don't worry, if you are publishing a future-dated article, it will not show on the production site until the file's specified date.
+- The preview link is shareable, but will be deleted when the pull request is merged or closed.
+
+> *This is an automated message.*

__tests__/message.txt

@@ -0,0 +1,7 @@
+## [Preview link](https://antares-blog-staging-pr-${{ github.event.number }}.azurewebsites.net)
+
+- Your changes have been deployed to the preview site. The preview site will update as you add more commits to this branch.
+- The preview site shows any future-dated articles. Don't worry, if you are publishing a future-dated article, it will not show on the production site until the file's specified date.
+- The preview link is shareable, but will be deleted when the pull request is merged or closed.
+
+> *This is an automated message.*

package-lock.json

@@ -3976,6 +3976,18 @@
       "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz",
       "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ=="
     },
+    "nock": {
+      "version": "12.0.3",
+      "resolved": "https://registry.npmjs.org/nock/-/nock-12.0.3.tgz",
+      "integrity": "sha512-QNb/j8kbFnKCiyqi9C5DD0jH/FubFGj5rt9NQFONXwQm3IPB0CULECg/eS3AU1KgZb/6SwUa4/DTRKhVxkGABw==",
+      "dev": true,
+      "requires": {
+        "debug": "^4.1.0",
+        "json-stringify-safe": "^5.0.1",
+        "lodash": "^4.17.13",
+        "propagate": "^2.0.0"
+      }
+    },
     "node-fetch": {
       "version": "2.6.0",
       "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.0.tgz",
@@ -4352,6 +4364,12 @@
         "sisteransi": "^1.0.4"
       }
     },
+    "propagate": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/propagate/-/propagate-2.0.1.tgz",
+      "integrity": "sha512-vGrhOavPSTz4QVNuBNdcNXePNdNMaO1xj9yBeH1ScQPjk/rhg9sSlCXPhMkFuaNNW/syTvYqsnbIJxMBfRbbag==",
+      "dev": true
+    },
     "psl": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.8.0.tgz",

package.json

@@ -43,6 +43,7 @@
     "eslint-config-prettier": "^6.10.1",
     "eslint-plugin-prettier": "^3.1.2",
     "jest": "^25.3.0",
+    "nock": "^12.0.3",
     "prettier": "^2.0.4",
     "ts-jest": "^25.3.1",
     "typescript": "^3.8.3"