pr_summary: warn if we can't fetch author's name and email

This displays a warning if we cannot fetch user's name and email from github
api, instead of displaying blank and null output in the author field (cli table).

Refs: nodejs/node#18721
Fixes: #180

Author: priyank-p

lib/pr_summary.js

@@ -34,8 +34,16 @@ class PRSummary {
     cli.table('Title', `${title} (#${prid})`);
     const authorHint =
       this.data.authorIsNew() ? ', first-time contributor' : '';
-    cli.table('Author',
-      `${author.name} <${author.email}> (@${author.login}${authorHint})`);
+
+    if (author.name && author.email) {
+      cli.table('Author',
+        `${author.name} <${author.email}> (@${author.login}${authorHint})`);
+    } else {
+      // Unable to retrive email/name of the PR Author
+      cli.warn('Could not retrieve the email or name ' +
+               "of the PR author's from user's GitHub profile!");
+    }
+
     cli.table('Branch', `${branch}`);
     cli.table('Labels', `${labelStr}`);
 

test/fixtures/data.js

@@ -59,6 +59,7 @@ const firstTimerPrivatePR = readJSON('first_timer_pr_with_private_email.json');
 const semverMajorPR = readJSON('semver_major_pr.json');
 const fixAndRefPR = readJSON('pr_with_fixes_and_refs.json');
 const conflictingPR = readJSON('conflicting_pr.json');
+const emptyProfilePR = readJSON('empty_profile_pr.json');
 const closedPR = readJSON('./closed_pr.json');
 const mergedPR = readJSON('./merged_pr.json');
 const readme = readFile('./README/README.md');
@@ -90,6 +91,7 @@ module.exports = {
   semverMajorPR,
   fixAndRefPR,
   conflictingPR,
+  emptyProfilePR,
   readme,
   readmeNoTsc,
   readmeNoTscE,

test/fixtures/empty_profile_pr.json

@@ -0,0 +1,22 @@
+{
+  "createdAt": "2017-10-24T11:13:43Z",
+  "authorAssociation": "COLLABORATOR",
+  "author": {
+    "login": "pr_author",
+    "email": "",
+    "name": null
+  },
+  "url": "https://github.com/nodejs/node/pull/18721",
+  "bodyHTML": "<p>Fix mdn links</p>",
+  "bodyText": "Fix mdn links",
+  "labels": {
+    "nodes": [
+      {
+        "name": "doc"
+      }
+    ]
+  },
+  "title": "doc: fix mdn links",
+  "baseRefName": "master",
+  "headRefName": "fix-links"
+}

test/unit/pr_summary.test.js

@@ -4,7 +4,8 @@ const {
   oddCommits,
   simpleCommits,
   firstTimerPR,
-  semverMajorPR
+  semverMajorPR,
+  emptyProfilePR
 } = require('../fixtures/data');
 const TestCLI = require('../fixtures/test_cli');
 const PRSummary = require('../../lib/pr_summary');
@@ -86,4 +87,37 @@ describe('PRSummary', () => {
     summary.display();
     cli.assertCalledWith(expectedLogs);
   });
+
+  it('displays warning if pr author/email is not present', () => {
+    const cli = new TestCLI();
+    const prData = {
+      pr: emptyProfilePR,
+      commits: simpleCommits,
+      authorIsNew() {
+        return false;
+      }
+    };
+
+    const expectedLogs = {
+      log: [
+        [' - doc: some changes'],
+        [' - Their Github Account email <[email protected]>']
+      ],
+      table: [
+        ['Title', 'doc: fix mdn links (#16348)'],
+        ['Branch', 'pr_author:fix-links -> nodejs:master'],
+        ['Labels', 'doc'],
+        ['Commits', '1'],
+        ['Committers', '1']
+      ],
+      warn: [
+        ['Could not retrieve the email or name ' +
+        "of the PR author's from user's GitHub profile!"]
+      ]
+    };
+
+    const summary = new PRSummary(argv, cli, prData);
+    summary.display();
+    cli.assertCalledWith(expectedLogs);
+  });
 });