fix: dispose adapter emulators after use

.changeset/calm-workers-retire.md

@@ -0,0 +1,6 @@
+---
+'@sveltejs/kit': patch
+'@sveltejs/adapter-cloudflare': patch
+---
+
+fix: dispose adapter emulators when their lifecycle ends

.github/workflows/platform-test.yml

@@ -0,0 +1,181 @@
+name: Platform Test
+
+on:
+  workflow_call:
+    inputs:
+      sha:
+        description: 'Commit SHA to test'
+        required: true
+        type: string
+      platform:
+        description: 'netlify or vercel'
+        required: true
+        type: string
+      variant:
+        description: 'Name of the test app variant'
+        required: true
+        type: string
+      app:
+        description: 'Directory of the test app'
+        required: true
+        type: string
+
+permissions:
+  contents: read
+
+env:
+  PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: '1'
+  APP: packages/adapter-${{ inputs.platform }}/test/apps/${{ inputs.app }}
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - &checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          ref: ${{ inputs.sha }}
+          persist-credentials: false
+
+      # reads the pnpm version from the commit under test: `main` is on v10, `version-3` on v12
+      - &pnpm
+        uses: pnpm/action-setup@ea17c68df8912ef543352723c149a84f56e3d413 # v6.1.0
+
+      - &node
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: 24
+
+      - &install
+        name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      # TODO: only adapter-netlify on `main` has a build script, remove this step after the v3 release
+      - name: Build adapter
+        env:
+          PLATFORM: ${{ inputs.platform }}
+        run: pnpm --filter "@sveltejs/adapter-$PLATFORM" --if-present build
+
+      - name: Build test app
+        working-directory: ${{ env.APP }}
+        env:
+          EDGE: ${{ inputs.variant == 'split-edge' }}
+        run: pnpm build
+
+      # the Netlify CLI bundles the functions in the deploy job, which has no `node_modules`
+      - name: Copy Kit next to the Netlify functions
+        if: inputs.platform == 'netlify'
+        run: |
+          mkdir -p "$APP/.netlify/v1/node_modules/@sveltejs/kit"
+          cp -r packages/kit/package.json packages/kit/src "$APP/.netlify/v1/node_modules/@sveltejs/kit"
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ${{ inputs.platform }}-${{ inputs.variant }}
+          # whichever of these the adapter wrote, relative to the test app
+          path: |
+            ${{ env.APP }}/build
+            ${{ env.APP }}/.netlify
+            ${{ env.APP }}/.vercel
+          include-hidden-files: true
+          if-no-files-found: error
+          retention-days: 1
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    environment: '@sveltejs/adapter-${{ inputs.platform }} platform tests'
+    steps:
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: ${{ inputs.platform }}-${{ inputs.variant }}
+
+      - uses: pnpm/setup@703c52620218391530e48b9e8870d5c0082e1b9b # v2.1.0
+        with:
+          version: ^12.0.0
+          runtime: node@24
+
+      - name: Install CLI
+        env:
+          CLI: ${{ inputs.platform == 'netlify' && 'netlify-cli' || 'vercel' }}
+        run: pnpm i -g "$CLI" --allow-build=esbuild --allow-build=netlify-cli
+
+      # the secrets are passed as flags and scrubbed from the environment the CLI bundles functions in
+      - name: Deploy to Netlify
+        if: inputs.platform == 'netlify'
+        env:
+          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_TOKEN }}
+          NETLIFY_PROJECT_ID: ${{ inputs.variant == 'basic' && secrets.NETLIFY_PROJECT_ID_BASIC || inputs.variant == 'edge' && secrets.NETLIFY_PROJECT_ID_EDGE || secrets.NETLIFY_PROJECT_ID_SPLIT }}
+        run: |
+          env -u NETLIFY_AUTH_TOKEN -u NETLIFY_PROJECT_ID \
+            netlify deploy --json --no-build --dir=build --functions=.netlify/v1/functions \
+            --auth="$NETLIFY_AUTH_TOKEN" --site="$NETLIFY_PROJECT_ID" \
+            | tee /dev/stderr | jq -er '.deploy_url' > url
+
+      # Important: When setting up a new Vercel test app, make sure
+      # to set the root directory in the dashboard to the correct path.
+      - name: Deploy to Vercel
+        if: inputs.platform == 'vercel'
+        env: &vercel-secrets
+          VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}
+          VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
+          VERCEL_PROJECT_ID: ${{ inputs.variant == 'basic' && secrets.VERCEL_PROJECT_ID_BASIC || secrets.VERCEL_PROJECT_ID_SPLIT }}
+        # the CLI reads `.vercel/output` from here but checks that the project's root directory exists
+        run: |
+          mkdir -p "$APP"
+          vercel deploy --prebuilt --yes --token="$VERCEL_TOKEN" > url
+
+      # avoid stale cache results when testing ISR routes
+      - name: Purge Vercel CDN Cache
+        if: inputs.platform == 'vercel' && inputs.variant == 'basic'
+        env: *vercel-secrets
+        run: vercel cache purge --type cdn --token="$VERCEL_TOKEN" --yes
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ${{ inputs.platform }}-${{ inputs.variant }}-url
+          path: url
+          if-no-files-found: error
+          retention-days: 1
+
+  test:
+    needs: deploy
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - *checkout
+      - *pnpm
+      - *node
+      - *install
+
+      - name: Install Playwright
+        run: pnpm playwright install chromium --no-shell
+
+      # some tests inspect the build output
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: ${{ inputs.platform }}-${{ inputs.variant }}
+          path: ${{ env.APP }}
+
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: ${{ inputs.platform }}-${{ inputs.variant }}-url
+          path: ${{ runner.temp }}
+
+      - name: Run Playwright tests
+        working-directory: ${{ env.APP }}
+        run: DEPLOYMENT_URL=$(cat "$RUNNER_TEMP/url") pnpm test:platform
+
+      - name: Upload test artifacts
+        if: failure()
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: test-results-${{ inputs.platform }}-${{ inputs.variant }}
+          path: ${{ env.APP }}/test-results
+          retention-days: 3