Add function app which delegates requests to Flask

Author: steventux

function_app.py

@@ -0,0 +1,14 @@
+import azure.functions as func
+from app import create_app
+
+funcapp = func.FunctionApp()
+flaskapp = create_app()
+
+
+@funcapp.route(
+    route="{*route}",
+    auth_level=func.AuthLevel.ANONYMOUS,
+    methods=[func.HttpMethod.GET, func.HttpMethod.POST],
+)
+def main(req: func.HttpRequest, context: func.Context) -> func.HttpResponse:
+    return func.WsgiMiddleware(flaskapp.wsgi_app).handle(req, context)

host.json

@@ -0,0 +1,7 @@
+{
+  "version": "2.0",
+  "extensionBundle": {
+    "id": "Microsoft.Azure.Functions.ExtensionBundle",
+    "version": "[4.*, 5.0.0)"
+  }
+}

local.settings.json

@@ -0,0 +1,7 @@
+{
+  "IsEncrypted": false,
+  "Values": {
+    "FUNCTIONS_WORKER_RUNTIME": "python",
+    "AzureWebJobsFeatureFlags": "EnableWorkerIndexing"
+  }
+}

tests/__init__.py

@@ -0,0 +1,5 @@
+import os
+import sys
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+sys.path.insert(0, os.path.dirname(SCRIPT_DIR) + "/../app/")

tests/unit/test_function_app.py

@@ -0,0 +1,24 @@
+from unittest.mock import MagicMock
+import azure.functions as func
+from function_app import main
+import json
+
+
+def test_function_app_calls_flask_app():
+    """Test that the function calls the flask app."""
+    req = func.HttpRequest(
+        method="GET",
+        body=b"",
+        url="/api/status/health-check",
+    )
+    mock_context = MagicMock(
+        function_directory=".",
+        invocation_id="123",
+        function_name="Notify"
+    )
+
+    func_call = main.build().get_user_function()
+    resp = func_call(req, mock_context)
+
+    assert resp.status_code == 200
+    assert json.loads(resp.get_body()) == {"status": "healthy"}