chore(prlint): don't mark PRs as 'not ready' on community comment (#27819)

laurelmay · web-flow · commit 412fb9fd53bd · 2023-11-08T20:52:20.000Z
Community reviewers have the ability to choose any of the approve/comment/request changes buttons that are available in the review tab. Prior to this change, `prlint` would consider a comment from a community reviewer as being equivalent to requesting changes (and in fact, didn't consider the requesting changes case). This would remove the `pr/needs-community-review` label which surprised some reviewers. With this change, `prlint` will only remove the `pr/needs-community-review` label when a community reviewer specifically chooses "request changes". Additionally, reviewers are now able to switch from approving to requesting changes (this doesn't override any other reviewers' approvals, just that reviewer's own). Additionally, this adds mocks for the `getTrustedCommunityMembers` method and avoids hardcoding the logins of multiple community reviewers into the tests. As a side effect, the tests also run faster since `curl` isn't being invoked so frequently. Here is a screenshot of what I see when reviewing on this repo: ![image](https://github.com/aws/aws-cdk/assets/850893/03d3b5e5-2798-47bf-951d-b72964f974aa) ---- *By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
diff --git a/tools/@aws-cdk/prlint/lint.ts b/tools/@aws-cdk/prlint/lint.ts
@@ -382,20 +382,41 @@ export class PullRequestLinter {
         && review.state === 'APPROVED',
     );
 
-    const communityApproved = reviews.data.some(
-      review => this.getTrustedCommunityMembers().includes(review.user?.login ?? '')
-        && review.state === 'APPROVED',
-    );
+    // NOTE: community reviewers may approve, comment, or request changes; however, it
+    // is possible for the same member to perform any combination of those actions on
+    // a single PR. We solve this by:
+    //   1. Filtering reviews to those by trusted community members
+    //   2. Filtering out reviews that only leave comments (without approving or requesting changes).
+    //      This allows a reviewer to participate in a conversation about their review without
+    //      effectively dismissing their review. While GitHub does not allow community reviewers
+    //      to dismiss their reviews (which requires privileges on the repo), they can leave a
+    //      new review with the opposite approve/request state to update their review.
+    //   3. Mapping reviewers to only their newest review
+    //   4. Checking if any reviewers' most recent review is an approval
+    //      -> If so, the PR is considered community approved; the approval can always
+    //         be dismissed by a maintainer to respect another reviewer's requested changes.
+    //   5. Checking if any reviewers' most recent review requested changes
+    //      -> If so, the PR is considered to still need changes to meet community review.
+    const reviewsByTrustedCommunityMembers = reviews.data
+      .filter(review => this.getTrustedCommunityMembers().includes(review.user?.login ?? ''))
+      .filter(review => review.state !== 'PENDING' && review.state !== 'COMMENTED')
+      .reduce((grouping, review) => {
+        // submitted_at is not present for PENDING comments but is present for other states.
+        // Because of that, it is optional on the type but sure to be present here. Likewise,
+        // review.user is sure to be defined because we're operating on reviews by trusted
+        // community members
+        let newest = grouping[review.user!.login] ?? review;
+        if (review.submitted_at! > newest.submitted_at!) {
+          newest = review;
+        }
 
-    // NOTE: community members can only approve or comment, but it is possible
-    // for the same member to have both an approved review and a commented review.
-    // we solve this issue by turning communityRequestedChanges to false if
-    // communityApproved is true. We can always dismiss an approved review if we want
-    // to respect someone else's requested changes.
-    const communityRequestedChanges = communityApproved ? false : reviews.data.some(
-      review => this.getTrustedCommunityMembers().includes(review.user?.login ?? '')
-        && review.state === 'COMMENTED',
-    );
+        return {
+          ...grouping,
+          [review.user!.login]: newest,
+        };
+      }, {} as Record<string, typeof reviews.data[0]>);
+    const communityApproved = Object.values(reviewsByTrustedCommunityMembers).some(({state}) => state === 'APPROVED');
+    const communityRequestedChanges = !communityApproved && Object.values(reviewsByTrustedCommunityMembers).some(({state}) => state === 'CHANGES_REQUESTED')
 
     const prLinterFailed = reviews.data.find((review) => review.user?.login === 'aws-cdk-automation' && review.state !== 'DISMISSED') as Review;
     const userRequestsExemption = pr.labels.some(label => (label.name === Exemption.REQUEST_EXEMPTION || label.name === Exemption.REQUEST_CLARIFICATION));
diff --git a/tools/@aws-cdk/prlint/test/lint.test.ts b/tools/@aws-cdk/prlint/test/lint.test.ts
@@ -7,8 +7,10 @@ let mockAddLabel = jest.fn();
 let mockListReviews = jest.fn().mockImplementation((_props: { _owner: string, _repo: string, _pull_number: number }) => {
   return { data: [{ id: 1111122222, user: { login: 'aws-cdk-automation' }, state: 'CHANGES_REQUESTED' }] };
 });
+
 beforeAll(() => {
   jest.spyOn(console, 'log').mockImplementation();
+  jest.spyOn(linter.PullRequestLinter.prototype as any, 'getTrustedCommunityMembers').mockImplementation(() => ['trusted1', 'trusted2', 'trusted3'])
   process.env.REPO_ROOT = path.join(__dirname, '..', '..', '..', '..');
 });
 
@@ -514,8 +516,8 @@ describe('integration tests required on features', () => {
     test('with label no error', async () => {
       labels.push({ name: 'pr-linter/cli-integ-tested' });
       const prLinter = configureMock(issue, files);
-      await prLinter.validatePullRequestTarget(SHA);
       // THEN: no exception
+      expect(async () => await prLinter.validatePullRequestTarget(SHA)).resolves;
     });
 
     test('with aws-cdk-automation author', async () => {
@@ -653,8 +655,8 @@ describe('integration tests required on features', () => {
       mockListReviews.mockImplementation(() => {
         return {
           data: [
-            { id: 1111122222, user: { login: 'aws-cdk-automation' }, state: 'CHANGES_REQUESTED' },
-            { id: 1111122223, user: { login: 'someuser' }, author_association: 'MEMBER', state: 'CHANGES_REQUESTED' },
+            { id: 1111122222, user: { login: 'aws-cdk-automation' }, state: 'CHANGES_REQUESTED', submitted_at: '2019-11-17T17:43:43Z'},
+            { id: 1111122223, user: { login: 'someuser' }, author_association: 'MEMBER', state: 'CHANGES_REQUESTED', submitted_at: '2019-11-18T17:43:43Z' },
           ],
         };
       });
@@ -723,7 +725,7 @@ describe('integration tests required on features', () => {
       mockListReviews.mockImplementation(() => {
         return {
           data: [
-            { id: 1111122223, user: { login: 'pahud' }, state: 'APPROVED' },
+            { id: 1111122223, user: { login: 'trusted1' }, state: 'APPROVED' },
           ],
         };
       });
@@ -761,8 +763,9 @@ describe('integration tests required on features', () => {
       mockListReviews.mockImplementation(() => {
         return {
           data: [
-            { id: 1111122223, user: { login: 'pahud' }, state: 'COMMENTED' },
-            { id: 1111122223, user: { login: 'pahud' }, state: 'APPROVED' },
+            { id: 1111122223, user: { login: 'trusted1' }, state: 'APPROVED', submitted_at: '2019-11-18T17:43:43Z' },
+            { id: 1111122224, user: { login: 'trusted2' }, state: 'CHANGES_REQUESTED', submitted_at: '2019-11-17T18:43:43Z' },
+            { id: 1111122225, user: { login: 'trusted3' }, state: 'COMMENTED', submitted_at: '2019-11-17T19:43:43Z' },
           ],
         };
       });
@@ -795,12 +798,12 @@ describe('integration tests required on features', () => {
       });
     });
 
-    test('trusted community member can "request changes" on p2 PR by commenting', async () => {
+    test('trusted community member can "request changes" on p2 PR by requesting changes', async () => {
       // GIVEN
       mockListReviews.mockImplementation(() => {
         return {
           data: [
-            { id: 1111122223, user: { login: 'pahud' }, state: 'COMMENTED' },
+            { id: 1111122223, user: { login: 'trusted1' }, state: 'CHANGES_REQUESTED', submitted_at: '2019-11-17T17:43:43Z' },
           ],
         };
       });
@@ -828,6 +831,123 @@ describe('integration tests required on features', () => {
       expect(mockAddLabel.mock.calls).toEqual([]);
     });
 
+    test('trusted community member can comment after requesting changes without dismissing', async () => {
+      // GIVEN
+      mockListReviews.mockImplementation(() => {
+        return {
+          data: [
+            { id: 1111122223, user: { login: 'trusted1' }, state: 'CHANGES_REQUESTED', submitted_at: '2019-11-17T17:43:43Z' },
+            { id: 1111122224, user: { login: 'trusted1' }, state: 'COMMENTED', submitted_at: '2019-11-18T17:43:43Z' },
+          ],
+        };
+      });
+      (pr as any).labels = [];
+
+      // WHEN
+      const prLinter = configureMock(pr);
+      await prLinter.validateStatusEvent(pr as any, {
+        sha: SHA,
+        context: linter.CODE_BUILD_CONTEXT,
+        state: 'success',
+      } as any);
+
+      // THEN
+      expect(mockRemoveLabel.mock.calls).toEqual([]);
+      expect(mockAddLabel.mock.calls).toEqual([]);
+    });
+
+    test('trusted community member comments dont mark as "changes requested"', async () => {
+      // GIVEN
+      mockListReviews.mockImplementation(() => {
+        return {
+          data: [
+            { id: 1111122223, user: { login: 'trusted1' }, state: 'COMMENTED', submitted_at: '2019-11-17T17:43:43Z' },
+          ],
+        };
+      });
+      (pr as any).labels = [
+        {
+          name: 'pr/needs-community-review',
+        },
+      ];
+
+      // WHEN
+      const prLinter = configureMock(pr);
+      await prLinter.validateStatusEvent(pr as any, {
+        sha: SHA,
+        context: linter.CODE_BUILD_CONTEXT,
+        state: 'success',
+      } as any);
+
+      // THEN
+      expect(mockRemoveLabel.mock.calls).toEqual([]);
+      expect(mockAddLabel.mock.calls).toEqual([]);
+    });
+
+    test('trusted community members can change own review from approval to requesting changes',  async () => {
+      // GIVEN
+      mockListReviews.mockImplementation(() => {
+        return {
+          data: [
+            { id: 1111122223, user: { login: 'trusted1' }, state: 'APPROVED', submitted_at: '2019-11-17T17:43:43Z' },
+            { id: 1111122224, user: { login: 'trusted1' }, state: 'CHANGES_REQUESTED', submitted_at: '2019-11-18T17:43:43Z' },
+          ]
+        }
+      });
+      (pr as any).labels = [
+        {
+          name: 'pr/needs-maintainer-review',
+        }
+      ];
+
+      // WHEN
+      const prLinter = configureMock(pr);
+      await prLinter.validateStatusEvent(pr as any, {
+        sha: SHA,
+        context: linter.CODE_BUILD_CONTEXT,
+        state: 'success',
+      } as any);
+
+      // THEN
+      expect(mockRemoveLabel.mock.calls[0][0]).toEqual({
+        issue_number: 1234,
+        name: 'pr/needs-maintainer-review',
+        owner: 'aws',
+        repo: 'aws-cdk',
+      });
+      expect(mockAddLabel.mock.calls).toEqual([]);
+    });
+
+    test('trusted community members can change own review from requesting changes to approval', async () => {
+      // GIVEN
+      mockListReviews.mockImplementation(() => {
+        return {
+          data: [
+            { id: 1111122223, user: { login: 'trusted1' }, state: 'CHANGES_REQUESTED', submitted_at: '2019-11-17T17:43:43Z' },
+            { id: 1111122224, user: { login: 'trusted1' }, state: 'APPROVED', submitted_at: '2019-11-18T17:43:43Z' },
+          ]
+        }
+      });
+      (pr as any).labels = [];
+
+      // WHEN
+      const prLinter = configureMock(pr);
+      await prLinter.validateStatusEvent(pr as any, {
+        sha: SHA,
+        context: linter.CODE_BUILD_CONTEXT,
+        state: 'success',
+      } as any);
+
+      // THEN
+      expect(mockRemoveLabel.mock.calls).toEqual([]);
+      expect(mockAddLabel.mock.calls[0][0]).toEqual({
+        issue_number: 1234,
+        labels: ['pr/needs-maintainer-review'],
+        owner: 'aws',
+        repo: 'aws-cdk',
+      });
+    });
+
     test('untrusted community member approval has no affect', async () => {
       // GIVEN
       mockListReviews.mockImplementation(() => {
