Redesign dataset workbench management

backend/tests/test_dataset_service.py

@@ -4,9 +4,10 @@ import zipfile
 
 import cv2
 import numpy as np
+import pytest
 from fastapi import UploadFile
 
-from app.modules.dataset.service import create_dataset, describe_dataset, generate_yolo_dataset_yaml, save_upload, validate_dataset
+from app.modules.dataset.service import copy_dataset, create_dataset, delete_dataset, describe_dataset, generate_yolo_dataset_yaml, save_upload, validate_dataset
 
 
 def test_create_dataset_layout(tmp_path, monkeypatch):
@@ -19,6 +20,32 @@ def test_create_dataset_layout(tmp_path, monkeypatch):
     assert created["counts"] == {"images": 0, "labels": 0, "masks": 0}
     described = describe_dataset("case_01")
     assert described["layout"]["images"].endswith("images")
+    assert described["files"]["images"] == []
+    with pytest.raises(ValueError, match="already exists"):
+        create_dataset("case 01", "duplicate")
+
+
+def test_copy_and_delete_dataset(tmp_path, monkeypatch):
+    from types import SimpleNamespace
+    from app.modules.dataset import service
+
+    monkeypatch.setattr(service, "settings", SimpleNamespace(project_root=tmp_path))
+    create_dataset("case base", "demo")
+    root = service.dataset_dir("case_base")
+    (root / "images" / "sample.png").write_bytes(b"image")
+
+    copied = copy_dataset("case_base", "case copy", "copy")
+
+    assert copied["name"] == "case_copy"
+    assert copied["description"] == "copy"
+    assert copied["counts"]["images"] == 1
+    with pytest.raises(ValueError, match="already exists"):
+        copy_dataset("case_base", "case_copy")
+
+    deleted = delete_dataset("case_copy")
+
+    assert deleted == {"deleted": True, "name": "case_copy"}
+    assert not service.dataset_dir("case_copy").exists()
 
 
 def test_validate_dataset_and_generate_yolo_yaml(tmp_path, monkeypatch):