Add specs

action.yml

@@ -9,4 +9,4 @@
       description: 'Human readable message with PR result'
   runs:
     using: 'node12'
-    main: 'index.js'
+    main: 'lib/index.js'

lib/index.js

@@ -0,0 +1,109 @@
+'use strict';
+
+const core = require('@actions/core');
+const github = require('@actions/github');
+
+const getFallbackBlocks = (jobStatus, payload) => {
+  const repoName = `*<${payload.repository.html_url}|${payload.repository.full_name}>*`;
+  const eventName = github.context.eventName;
+  const success = jobStatus === 'Success';
+  const author = `<${payload.sender.html_url}|${payload.sender.login}>`;
+  const emoji = success ? ':thumbsup:' : ':thumbsdown:';
+  const eventLink = `<${payload.repository.html_url}|${eventName}>`;
+
+  return [
+    {
+      "type": "section",
+      "text": `${repoName}: the result of a ${eventName} by ${author} was: ${emoji}\n Details: ${eventLink}`
+    }
+  ];
+};
+
+const getField = (head, body) => {
+  return {
+    "type": "mrkdwn",
+    "text": `*${head}*: ${body}`
+  }
+};
+
+const getButton = (title, url) => {
+  return {
+    "type": "button",
+    "text": {
+      "type": "plain_text",
+      "text": title
+    },
+    "url": url
+  };
+};
+
+const getPullRequestBlocks = (jobStatus, payload) => {
+  const success = jobStatus === 'Success';
+  const pullRequest = payload.pull_request;
+
+  const repoName = `*<${payload.repository.html_url}|${payload.repository.full_name}>*`;
+  const firstLine = `${repoName}`;
+
+  const emoji = success ? ':thumbsup:' : ':thumbsdown:';
+  const prURL = pullRequest.html_url;
+  const pullRequestLink = `<${prURL}|${pullRequest.title} #${pullRequest.number}>`;
+  const secondLine = `${pullRequestLink} ${emoji}`;
+
+  const author = `<${payload.sender.html_url}|${payload.sender.login}>`;
+  const thirdLine = `${author} submitted a pull request`;
+
+  const textBlock = {
+    "type": "mrkdwn",
+    "text": [firstLine, secondLine, thirdLine].join('\n')
+  };
+
+  const divider = {
+    "type": "divider"
+  };
+
+  return [
+    {
+      "type": "section",
+      "text": textBlock,
+      "accessory": getButton('Execution Details', `${prURL}/checks`),
+      "fields": [
+        getField('Branch', pullRequest.head.ref),
+        getField('Sha', pullRequest.head.sha.substring(0, 7)),
+        getField('Changed files', pullRequest.changed_files),
+        getField('Commits', pullRequest.commits)
+      ]
+    },
+    divider
+  ];
+};
+
+const formatBlocks = obj => {
+  return JSON.stringify(obj).replace(/"/g, '\\"')
+};
+
+const run = () => {
+  try {
+    const jobStatus = core.getInput('job-status');
+    const payload = github.context.payload;
+    const isPR = github.context.eventName === 'pull_request';
+    const blocks = isPR ? getPullRequestBlocks(jobStatus, payload) : getFallbackBlocks(jobStatus, payload);
+
+    core.setOutput('blocks', formatBlocks(blocks));
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+};
+
+module.exports = {
+  getPullRequestBlocks: getPullRequestBlocks,
+  getField: getField,
+  getButton: getButton,
+  getFallbackBlocks: getFallbackBlocks,
+  formatBlocks: formatBlocks,
+  run: run
+};
+
+if (!process.argv.join('').includes('jasmine')) {
+  run();
+}
+