Update preload test for safari (vercel#26020)

Author: ijjk

.github/workflows/build_test_deploy.yml

@@ -192,7 +192,7 @@ jobs:
         with:
           path: ./*
           key: ${{ github.sha }}
-      - run: node run-tests.js test/integration/production/test/index.test.js
+      - run: node run-tests.js -c 1 test/integration/production/test/index.test.js
         if: ${{needs.build.outputs.docsChange != 'docs only change'}}
 
   testSafari:
@@ -213,7 +213,7 @@ jobs:
         with:
           path: ./*
           key: ${{ github.sha }}
-      - run: '[[ -z "$BROWSERSTACK_ACCESS_KEY" ]] && echo "Skipping for PR" || node run-tests.js test/integration/production/test/index.test.js'
+      - run: '[[ -z "$BROWSERSTACK_ACCESS_KEY" ]] && echo "Skipping for PR" || node run-tests.js -c 1 test/integration/production/test/index.test.js'
         if: ${{needs.build.outputs.docsChange != 'docs only change'}}
 
   testSafariOld:
@@ -235,7 +235,7 @@ jobs:
         with:
           path: ./*
           key: ${{ github.sha }}
-      - run: '[[ -z "$BROWSERSTACK_ACCESS_KEY" ]] && echo "Skipping for PR" || node run-tests.js test/integration/production-nav/test/index.test.js'
+      - run: '[[ -z "$BROWSERSTACK_ACCESS_KEY" ]] && echo "Skipping for PR" || node run-tests.js -c 1 test/integration/production-nav/test/index.test.js'
         if: ${{needs.build.outputs.docsChange != 'docs only change'}}
 
   publishRelease:

test/integration/production/test/index.test.js

@@ -680,7 +680,7 @@ describe('Production Usage', () => {
       if (browserName === 'safari') {
         const elements = await browser.elementsByCss('link[rel=preload]')
         // 4 page preloads and 5 existing preloads for _app, commons, main, etc
-        expect(elements.length).toBe(11)
+        expect(elements.length).toBe(5)
       } else {
         const elements = await browser.elementsByCss('link[rel=prefetch]')
         expect(elements.length).toBe(4)