完成初版

tests/conftest.py

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+import pytest
+from pathlib import Path
+from openpyxl import Workbook
+
+
+@pytest.fixture
+def sample_excel_path() -> Path:
+    """返回根目录下的 sample.xlsx 路径"""
+    path = Path(__file__).parent.parent / "sample.xlsx"
+    if not path.exists():
+        pytest.skip(f"测试文件 {path} 不存在")
+    return path
+
+
+@pytest.fixture
+def invalid_excel_path(tmp_path: Path) -> Path:
+    """创建缺少 Scenario1 表的无效 Excel 文件"""
+    wb = Workbook()
+    wb.save(tmp_path / "invalid.xlsx")
+    return tmp_path / "invalid.xlsx"
+
+
+@pytest.fixture
+def sample_data_dict() -> dict:
+    """返回示例数据字典"""
+    return {
+        "Scenario1": {
+            "headers": ["Column1", "Column2", "Column3"],
+            "rows": [
+                ["Value1", "Value2", "Value3"],
+                ["Value4", "Value5", "Value6"]
+            ]
+        }
+    }
+
+
+@pytest.fixture
+def sample_sheets_dict() -> dict:
+    """返回示例工作表字典"""
+    return {
+        "Scenario1": {
+            "A1": "Header1",
+            "B1": "Header2",
+            "A2": "Data1",
+            "B2": "Data2"
+        }
+    }