feat: add async conformance tests with ASGI gateway

Author: taeold

.github/workflows/conformance-async.yml

@@ -0,0 +1,89 @@
+name: Python Conformance CI (asgi)
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request:
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        python: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        platform: [ubuntu-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+    - name: Harden Runner
+      uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
+      with:
+        disable-sudo: true
+        egress-policy: block
+        allowed-endpoints: >
+          api.github.com:443
+          files.pythonhosted.org:443
+          github.com:443
+          objects.githubusercontent.com:443
+          proxy.golang.org:443
+          pypi.org:443
+          storage.googleapis.com:443
+
+    - name: Checkout code
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+    - name: Setup Python
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+      with:
+        python-version: ${{ matrix.python }}
+
+    - name: Install the framework with async extras
+      run: python -m pip install -e .[async]
+
+    - name: Setup Go
+      uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+      with:
+        go-version: '1.24'
+
+    - name: Run HTTP conformance tests
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
+      with:
+        functionType: 'http'
+        useBuildpacks: false
+        validateMapping: false
+        cmd: "'functions-framework --source tests/conformance/main.py --target write_http --signature-type http --gateway asgi'"
+
+    - name: Run CloudEvents conformance tests
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
+      with:
+        functionType: 'cloudevent'
+        useBuildpacks: false
+        validateMapping: true
+        cmd: "'functions-framework --source tests/conformance/main.py --target write_cloud_event --signature-type cloudevent --gateway asgi'"
+
+    - name: Run HTTP conformance tests declarative
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
+      with:
+        functionType: 'http'
+        useBuildpacks: false
+        validateMapping: false
+        cmd: "'functions-framework --source tests/conformance/main.py --target write_http_declarative --gateway asgi'"
+
+    - name: Run CloudEvents conformance tests declarative
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
+      with:
+        functionType: 'cloudevent'
+        useBuildpacks: false
+        validateMapping: true
+        cmd: "'functions-framework --source tests/conformance/main.py --target write_cloud_event_declarative --gateway asgi'"
+
+    - name: Run HTTP concurrency tests declarative
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@72a4f36b10f1c6435ab1a86a9ea24bda464cc262 # v1.8.6
+      with:
+        functionType: 'http'
+        useBuildpacks: false
+        validateConcurrency: true
+        cmd: "'functions-framework --source tests/conformance/main.py --target write_http_declarative_concurrent --gateway asgi'"
+
+    # Note: Event (legacy) and Typed tests are not supported in ASGI mode