PRChecker: support new label fast-track (#104)

* PRChecker: support new label fast-track

lib/pr_checker.js

@@ -53,8 +53,8 @@ class PRChecker {
     const status = [
       this.checkReviews(comments),
       this.checkCommitsAfterReview(),
-      this.checkPRWait(new Date()),
       this.checkCI(),
+      this.checkPRWait(new Date()),
       this.checkMergeableState()
     ];
 
@@ -150,12 +150,31 @@ class PRChecker {
    * @param {Date} now
    */
   checkPRWait(now) {
-    const { pr } = this;
-    const { cli } = this;
+    const {
+      pr, cli, reviewers, CIStatus
+    } = this;
     const labels = pr.labels.nodes;
-    const fast = labels.some((l) => l.name === 'code-and-learn') ||
-      (labels.length === 1 && labels[0].name === 'doc');
-    if (fast) { return true; }
+
+    const fast =
+      labels.some((l) => ['fast-track'].includes(l.name));
+    if (fast) {
+      const { approved } = reviewers;
+      if (approved.length > 1 && CIStatus) {
+        cli.info('This PR is being fast-tracked');
+        return true;
+      } else {
+        const msg = ['This PR is being fast-tracked, but awating '];
+        if (approved.length < 2) msg.push('approvals of 2 contributors');
+        if (!CIStatus) msg.push('a CI run');
+
+        let warnMsg = msg.length === 2
+          ? msg.join('') : `${msg[0] + msg[1]} and ${msg[2]}`;
+        cli.warn(warnMsg);
+      }
+
+      return false;
+    }
+
     const wait = this.getWait(now);
     if (wait.timeLeft > 0) {
       const dateStr = new Date(pr.createdAt).toDateString();
@@ -182,6 +201,7 @@ class PRChecker {
     let status = true;
     if (!ciMap.size) {
       cli.error('No CI runs detected');
+      this.CIStatus = false;
       return false;
     } else if (!ciMap.get(FULL)) {
       status = false;
@@ -231,6 +251,7 @@ class PRChecker {
       }
     }
 
+    this.CIStatus = status;
     return status;
   }
 

test/unit/pr_checker.test.js

@@ -201,37 +201,151 @@ describe('PRChecker', () => {
       cli.assertCalledWith(expectedLogs);
     });
 
-    it('should skip wait check for Code & Learn PR', () => {
+    it('should log as expected if PR can be fast-tracked', () => {
       const cli = new TestCLI();
 
-      const expectedLogs = {};
+      const expectedLogs = {
+        info: [
+          [ 'This PR is being fast-tracked' ]
+        ]
+      };
 
-      const now = new Date();
-      const youngPR = Object.assign({}, firstTimerPR, {
-        createdAt: '2017-10-27T14:25:41.682Z',
+      const now = new Date('2017-11-01T14:25:41.682Z');
+      const PR = Object.assign({}, firstTimerPR, {
+        createdAt: '2017-10-31T13:00:41.682Z',
         labels: {
           nodes: [
-            {
-              name: 'code-and-learn'
-            }
+            { name: 'fast-track' }
           ]
         }
       });
 
       const options = {
-        pr: youngPR,
+        pr: PR,
         reviewers: allGreenReviewers,
-        comments: commentsWithLGTM,
+        comments: commentsWithCI,
         reviews: approvingReviews,
-        commits: simpleCommits,
+        commits: [],
         collaborators
       };
       const checker = new PRChecker(cli, options, argv);
 
+      checker.checkCI();
+      cli.clearCalls();
       const status = checker.checkPRWait(now);
       assert(status);
       cli.assertCalledWith(expectedLogs);
     });
+
+    it('should warn about approvals and CI for fast-tracked PR', () => {
+      const cli = new TestCLI();
+
+      const expectedLogs = {
+        warn: [
+          [ 'This PR is being fast-tracked, but awating ' +
+          'approvals of 2 contributors and a CI run' ]
+        ]
+      };
+
+      const now = new Date('2017-11-01T14:25:41.682Z');
+      const PR = Object.assign({}, firstTimerPR, {
+        createdAt: '2017-10-31T13:00:41.682Z',
+        labels: {
+          nodes: [
+            { name: 'fast-track' }
+          ]
+        }
+      });
+
+      const options = {
+        pr: PR,
+        reviewers: requestedChangesReviewers,
+        comments: [],
+        reviews: requestingChangesReviews,
+        commits: simpleCommits,
+        collaborators
+      };
+      const checker = new PRChecker(cli, options, argv);
+
+      checker.checkCI();
+      cli.clearCalls();
+      const status = checker.checkPRWait(now);
+      assert(!status);
+      cli.assertCalledWith(expectedLogs);
+    });
+
+    it('should warn cannot be fast-tracked because of approvals', () => {
+      const cli = new TestCLI();
+
+      const expectedLogs = {
+        warn: [
+          [ 'This PR is being fast-tracked, but awating ' +
+          'approvals of 2 contributors' ]
+        ]
+      };
+
+      const now = new Date('2017-11-01T14:25:41.682Z');
+      const PR = Object.assign({}, firstTimerPR, {
+        createdAt: '2017-10-31T13:00:41.682Z',
+        labels: {
+          nodes: [
+            { name: 'fast-track' }
+          ]
+        }
+      });
+
+      const options = {
+        pr: PR,
+        reviewers: requestedChangesReviewers,
+        comments: commentsWithCI,
+        reviews: approvingReviews,
+        commits: [],
+        collaborators
+      };
+      const checker = new PRChecker(cli, options, argv);
+
+      checker.checkCI();
+      cli.clearCalls();
+      const status = checker.checkPRWait(now);
+      assert(!status);
+      cli.assertCalledWith(expectedLogs);
+    });
+
+    it('should warn if the PR has no CI and cannot be fast-tracked', () => {
+      const cli = new TestCLI();
+
+      const expectedLogs = {
+        warn: [
+          [ 'This PR is being fast-tracked, but awating a CI run' ]
+        ]
+      };
+
+      const now = new Date('2017-11-01T14:25:41.682Z');
+      const PR = Object.assign({}, firstTimerPR, {
+        createdAt: '2017-10-31T13:00:41.682Z',
+        labels: {
+          nodes: [
+            { name: 'fast-track' }
+          ]
+        }
+      });
+
+      const options = {
+        pr: PR,
+        reviewers: allGreenReviewers,
+        comments: [],
+        reviews: approvingReviews,
+        commits: simpleCommits,
+        collaborators
+      };
+      const checker = new PRChecker(cli, options, argv);
+
+      checker.checkCI();
+      cli.clearCalls();
+      const status = checker.checkPRWait(now);
+      assert(!status);
+      cli.assertCalledWith(expectedLogs);
+    });
   });
 
   describe('checkCI', () => {