refactor: 修改 StepMonitorCallback, 分离职责

tests/data/test_checkpoint.py

@@ -2,7 +2,6 @@ import torch
 import tempfile
 import torch.distributed as dist
 
-from pathlib import Path
 from torch.optim import AdamW
 from torch.optim.lr_scheduler import CosineAnnealingLR
 from khaosz.data.checkpoint import Checkpoint
@@ -28,25 +27,16 @@ def test_single_process():
     checkpoint = Checkpoint(
         state_dict=model.state_dict(),
         epoch=3,
-        iteration=30,
-        metrics={
-            "loss": [0.5, 0.4, 0.3, 0.2, 0.1],
-            "accuracy": [0.6, 0.7, 0.8, 0.85, 0.9]
-        }
+        iteration=30
     )
     
     with tempfile.TemporaryDirectory() as tmpdir:
-        checkpoint.save(tmpdir, save_metric_plot=True)
+        checkpoint.save(tmpdir)
         
         loaded_checkpoint = Checkpoint.load(tmpdir)
         
         assert loaded_checkpoint.epoch == 3
         assert loaded_checkpoint.iteration == 30
-        assert loaded_checkpoint.metrics["loss"] == [0.5, 0.4, 0.3, 0.2, 0.1]
-        
-        png_files = list(Path(tmpdir).glob("*.png"))
-        assert png_files
-
 def simple_training():
     model = torch.nn.Linear(10, 5)
     optimizer = AdamW(model.parameters(), lr=1e-3)
@@ -66,7 +56,6 @@ def simple_training():
         state_dict=model.state_dict(),
         epoch=2,
         iteration=10,
-        metrics={"loss": [0.3, 0.2, 0.1]}
     )
     
     rank = get_rank()