fix reference tests for convert_format_bounding_box (#6860)

* fix reference tests for convert_format_bounding_box

* add check to prevent empty args_kwargs_fns in the future

test/prototype_transforms_kernel_infos.py

@@ -536,12 +536,12 @@ def sample_inputs_convert_format_bounding_box():
 
 def reference_convert_format_bounding_box(bounding_box, old_format, new_format):
     return torchvision.ops.box_convert(
-        bounding_box, in_fmt=old_format.kernel_name.lower(), out_fmt=new_format.kernel_name.lower()
-    )
+        bounding_box, in_fmt=old_format.name.lower(), out_fmt=new_format.name.lower()
+    ).to(bounding_box.dtype)
 
 
 def reference_inputs_convert_format_bounding_box():
-    for args_kwargs in sample_inputs_convert_color_space_image_tensor():
+    for args_kwargs in sample_inputs_convert_format_bounding_box():
         if len(args_kwargs.args[0].shape) == 2:
             yield args_kwargs
 

test/test_prototype_transforms_functional.py

@@ -38,6 +38,10 @@ ignore_jit_warning_no_profile = pytest.mark.filterwarnings(
 
 def make_info_args_kwargs_params(info, *, args_kwargs_fn, test_id=None):
     args_kwargs = list(args_kwargs_fn(info))
+    if not args_kwargs:
+        raise pytest.UsageError(
+            f"Couldn't collect a single `ArgsKwargs` for `{info.id}`{f' in {test_id}' if test_id else ''}"
+        )
     idx_field_len = len(str(len(args_kwargs)))
     return [
         pytest.param(