import csv
from pathlib import Path
from src.config_loader import load_config
from src.main_experiment_manager import MainExperimentManager
def test_plan_empty_progress_exports(tmp_path:Path)->None:
    m=MainExperimentManager(load_config("config/default.yaml",None));assert m.build_plan().target_prompt_valid_records==30;p=m.evaluate_progress(tmp_path);assert not p.ready_for_final_analysis;assert m.export_progress_csv(p,tmp_path/"p.csv").read_bytes().startswith(b"\xef\xbb\xbf");assert m.export_progress_markdown(p,tmp_path/"p.md").exists()