Add unit test for sensors in swiss public transport (#134115)

* add unit test for sensors

* clean up

tests/components/swiss_public_transport/conftest.py

@@ -1,10 +1,57 @@
 """Common fixtures for the swiss_public_transport tests."""
 
 from collections.abc import Generator
+import json
 from unittest.mock import AsyncMock, patch
 
 import pytest
 
+from homeassistant.components.swiss_public_transport.const import (
+    CONF_DESTINATION,
+    CONF_START,
+    DOMAIN,
+)
+
+from tests.common import MockConfigEntry, load_fixture
+
+START = "Zürich"
+DESTINATION = "Bern"
+
+
+@pytest.fixture
+def mock_opendata_client() -> Generator[AsyncMock]:
+    """Mock a Opendata client."""
+    with (
+        patch(
+            "homeassistant.components.swiss_public_transport.OpendataTransport",
+            autospec=True,
+        ) as mock_client,
+        patch(
+            "homeassistant.components.swiss_public_transport.config_flow.OpendataTransport",
+            new=mock_client,
+        ),
+    ):
+        client = mock_client.return_value
+        client.async_get_data.return_value = None
+        client.from_name = START
+        client.to_name = DESTINATION
+        client.connections = json.loads(load_fixture("connections.json", DOMAIN))[0:3]
+        yield client
+
+
+@pytest.fixture(name="swiss_public_transport_config_entry")
+def mock_swiss_public_transport_config_entry() -> MockConfigEntry:
+    """Mock cookidoo configuration entry."""
+    return MockConfigEntry(
+        domain=DOMAIN,
+        data={
+            CONF_START: START,
+            CONF_DESTINATION: DESTINATION,
+        },
+        title=f"{START} {DESTINATION}",
+        entry_id="01JBVVVJ87F6G5V0QJX6HBC94T",
+    )
+
 
 @pytest.fixture
 def mock_setup_entry() -> Generator[AsyncMock]: