Re-enable LightningCLI test disabled due to bug in jsonargparse (#19683)

Author: awaelchli

requirements/pytorch/extra.txt

@@ -5,7 +5,7 @@
 matplotlib>3.1, <3.9.0
 omegaconf >=2.0.5, <2.4.0
 hydra-core >=1.0.5, <1.4.0
-jsonargparse[signatures] >=4.26.1, <4.28.0
+jsonargparse[signatures] >=4.27.7, <4.28.0
 rich >=12.3.0, <13.6.0
 tensorboardX >=2.2, <2.7.0  # min version is set by torch.onnx missing attribute
 bitsandbytes ==0.41.0  # strict

src/lightning/pytorch/cli.py

@@ -31,7 +31,7 @@
 from lightning.pytorch.utilities.model_helpers import is_overridden
 from lightning.pytorch.utilities.rank_zero import rank_zero_warn
 
-_JSONARGPARSE_SIGNATURES_AVAILABLE = RequirementCache("jsonargparse[signatures]>=4.26.1")
+_JSONARGPARSE_SIGNATURES_AVAILABLE = RequirementCache("jsonargparse[signatures]>=4.27.7")
 
 if _JSONARGPARSE_SIGNATURES_AVAILABLE:
     import docstring_parser

tests/tests_pytorch/test_cli.py

@@ -47,7 +47,6 @@
 from lightning.pytorch.utilities.exceptions import MisconfigurationException
 from lightning.pytorch.utilities.imports import _TORCHVISION_AVAILABLE
 from lightning_utilities import compare_version
-from lightning_utilities.core.imports import RequirementCache
 from lightning_utilities.test.warning import no_warning_call
 from tensorboard.backend.event_processing import event_accumulator
 from tensorboard.plugins.hparams.plugin_data_pb2 import HParamsPluginData
@@ -1404,12 +1403,6 @@ def __init__(self, activation: torch.nn.Module = lazy_instance(torch.nn.LeakyReL
         assert cli.model.activation is not model.activation
 
 
-@pytest.mark.xfail(
-    # https://github.com/omni-us/jsonargparse/issues/473
-    condition=(RequirementCache("jsonargparse>=4.27.6")),
-    strict=False,
-    reason="Breaking change for `lazy_instance` in jsonargparse",
-)
 def test_ddpstrategy_instantiation_and_find_unused_parameters(mps_count_0):
     strategy_default = lazy_instance(DDPStrategy, find_unused_parameters=True)
     with mock.patch("sys.argv", ["any.py", "--trainer.strategy.process_group_backend=group"]):