Allow sending webhooks via WS connection (#62725)

tests/util/test_aiohttp.py

@@ -1,4 +1,5 @@
 """Test aiohttp request helper."""
+from aiohttp import web
 
 from homeassistant.util import aiohttp
 
@@ -25,3 +26,53 @@ async def test_request_post_query():
     assert request.method == "POST"
     assert await request.post() == {"hello": "2", "post": "true"}
     assert request.query == {"get": "true"}
+
+
+def test_serialize_text():
+    """Test serializing a text response."""
+    response = web.Response(status=201, text="Hello")
+    assert aiohttp.serialize_response(response) == {
+        "status": 201,
+        "body": "Hello",
+        "headers": {"Content-Type": "text/plain; charset=utf-8"},
+    }
+
+
+def test_serialize_body_str():
+    """Test serializing a response with a str as body."""
+    response = web.Response(status=201, body="Hello")
+    assert aiohttp.serialize_response(response) == {
+        "status": 201,
+        "body": "Hello",
+        "headers": {"Content-Length": "5", "Content-Type": "text/plain; charset=utf-8"},
+    }
+
+
+def test_serialize_body_None():
+    """Test serializing a response with a str as body."""
+    response = web.Response(status=201, body=None)
+    assert aiohttp.serialize_response(response) == {
+        "status": 201,
+        "body": None,
+        "headers": {},
+    }
+
+
+def test_serialize_body_bytes():
+    """Test serializing a response with a str as body."""
+    response = web.Response(status=201, body=b"Hello")
+    assert aiohttp.serialize_response(response) == {
+        "status": 201,
+        "body": "Hello",
+        "headers": {},
+    }
+
+
+def test_serialize_json():
+    """Test serializing a JSON response."""
+    response = web.json_response({"how": "what"})
+    assert aiohttp.serialize_response(response) == {
+        "status": 200,
+        "body": '{"how": "what"}',
+        "headers": {"Content-Type": "application/json; charset=utf-8"},
+    }