Problem: Webscoekt log endpoint was not tested

Solution: add test

tests/supervisor/views/test_operator.py

@@ -1,3 +1,4 @@
+import asyncio
 import datetime
 
 import pytest
@@ -144,3 +145,54 @@ def __init__(self):
     )
     assert response.status == 200
     assert await response.text() == "2020-10-12T01:02:00> logline12020-10-12T01:03:00> logline2"
+
+
+@pytest.mark.asyncio
+async def test_websocket_logs(aiohttp_client, mocker):
+    mock_address = "mock_address"
+    mock_hash = "fake_vm_fake_vm_fake_vm_fake_vm_fake_vm_fake_vm_fake_vm_fake_vm_"
+    mocker.patch(
+        "aleph.vm.orchestrator.views.operator.authenticate_websocket_message",
+        return_value=mock_address,
+    )
+    fake_queue = asyncio.Queue()
+
+    # noinspection PyMissingConstructor
+    class FakeVmPool(VmPool):
+        def __init__(self):
+            pass
+
+        executions = {
+            mock_hash: mocker.Mock(
+                vm_hash=mock_hash,
+                message=mocker.Mock(address=mock_address),
+                is_confidential=False,
+                is_running=True,
+                vm=mocker.Mock(
+                    get_log_queue=mocker.Mock(return_value=fake_queue),
+                ),
+            ),
+        }
+        systemd_manager = mocker.Mock(restart=mocker.Mock())
+
+    app = setup_webapp()
+    pool = FakeVmPool()
+    app["vm_pool"] = pool
+    app["pubsub"] = FakeVmPool()
+    client = await aiohttp_client(app)
+    websocket = await client.ws_connect(
+        f"/control/machine/{mock_hash}/stream_logs",
+    )
+    await websocket.send_json({"auth": "auth is disabled"})
+    response = await websocket.receive_json()
+    assert response == {"status": "connected"}
+
+    await fake_queue.put(("stdout", "this is a first log entry"))
+    response = await websocket.receive_json()
+    assert response == {"message": "this is a first log entry", "type": "stdout"}
+
+    await fake_queue.put(("stdout", "this is a second log entry"))
+    response = await websocket.receive_json()
+    assert response == {"message": "this is a second log entry", "type": "stdout"}
+    await websocket.close()
+    assert websocket.closed