test: add unit test on GoneError raising during watch request

kr8s/tests/test_api.py

@@ -8,7 +8,7 @@
 
 import kr8s
 import kr8s.asyncio
-from kr8s._exceptions import APITimeoutError
+from kr8s._exceptions import APITimeoutError, GoneError
 from kr8s.asyncio.objects import Pod, Table
 
 
@@ -314,6 +314,30 @@ async def test_api_timeout() -> None:
         await api.version()
 
 
+async def test_api_gone(example_pod_spec):
+    pod = await Pod(example_pod_spec)
+    await pod.create()
+
+    i = 0
+    with pytest.raises(GoneError):
+        # Start a watch request on the pod with a very small resourceVersion
+        async for _ in pod.api.async_watch(
+            pod.endpoint,
+            namespace=pod.namespace,
+            field_selector=f"metadata.name={pod.name}",
+            since=1,
+        ):
+            # Patch the pod to increment the resourceVersion if needed
+            await pod.patch({
+                "metadata": {
+                    "annotations": {"version": i},
+                }
+            })
+            i += 1
+
+    await pod.delete()
+
+
 async def test_lookup_kind():
     api = await kr8s.asyncio.api()