From 65b647c851be23879dc672c8d43ca92a4a212d6f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Filip=20Myll=C3=A4ri?= <fmyllari@spotify.com>
Date: Tue, 29 Sep 2026 13:09:51 +0200
Subject: [PATCH] ci: shard e2e tests across 4 runners

The e2e suite runs serially (~260s). Split it by file across 4 parallel
runners and keep a stable 'E2E tests' aggregate check.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 .github/workflows/ci.yml | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 38a2ce3..7b473a0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,9 +30,15 @@ jobs:
       - run: pnpm test
 
   e2e:
-    name: E2E tests
+    name: E2E tests (${{ matrix.shard }}/4)
     runs-on: ubuntu-latest
     needs: qa
+    # The e2e suite runs serially (fixed auth callback port), so split it across
+    # runners by file instead. Each shard gets its own machine and port.
+    strategy:
+      fail-fast: false
+      matrix:
+        shard: [1, 2, 3, 4]
     steps:
       - uses: actions/checkout@fbc6f3992d24b796d5a048ff273f7fcc4a7b6c09 # v5.1.0
         with:
@@ -44,4 +50,18 @@ jobs:
           cache: pnpm
 
       - run: pnpm install --frozen-lockfile
-      - run: pnpm test:e2e
+      - run: pnpm test:e2e --shard=${SHARD}/4
+        env:
+          SHARD: ${{ matrix.shard }}
+
+  # Stable check name that reports the combined result of all e2e shards.
+  e2e-result:
+    name: E2E tests
+    runs-on: ubuntu-latest
+    needs: e2e
+    if: ${{ !cancelled() }}
+    permissions: {}
+    steps:
+      - run: test "${RESULT}" = success
+        env:
+          RESULT: ${{ needs.e2e.result }}