66 lines
2.8 KiB
Python
66 lines
2.8 KiB
Python
r"""子程序 gcov 行号不得并入主程序 gcov 字典的回归测试。
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Bug：`generate_coverage_report` 用 `gcov_data.update(sub_merged)` 把子程序
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(SUB*.cbl) 的 gcov 行计数并入主程序行号字典。主程序与子程序的行号都是纯
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整数，直接碰撞——SUB04CHK 的第 167 行（count=0）覆盖了 SHA02MNC 主程序
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第 167 行（count=25，主循环 PERFORM 已进入），导致 #10 Enter 分支被误判为
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未覆盖（SHA02MNC 覆盖率从应有的水平被拉低）。
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修复：子程序 gcov 按子程序名独立保存（`_sub_gcov_data`），不并入主程序
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`gcov_data`。`_merge_run_dirs_gcov` 对单个程序跨 run 目录合并。
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"""
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import sys, os
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sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
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from pathlib import Path
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from cobol_testgen.gcov import parse_cbl_gcov
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from orchestrator_db import _merge_run_dirs_gcov
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def _write_fake_gcov(dirpath: Path, name: str, counts: dict[int, int]):
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lines = []
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for ln in sorted(counts):
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cnt = counts[ln]
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marker = "#####" if cnt == 0 else f"{cnt}*"
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lines.append(f"{marker}:{ln}: dummy source line\n")
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(dirpath / f"{name}.cbl.gcov").write_text("".join(lines), encoding="utf-8")
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def _fake_gcov_func(name: str, d: str):
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return parse_cbl_gcov(os.path.join(d, f"{name}.cbl.gcov"))
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def test_sub_gcov_line_collision_does_not_corrupt_main(tmp_path):
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run_normal = tmp_path / "run_normal"; run_normal.mkdir()
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run_fail = tmp_path / "run_fail"; run_fail.mkdir()
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# 主程序：line 167 在 normal 场景执行 25 次（主循环进入）
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_write_fake_gcov(run_normal, "MAIN", {167: 25, 265: 1})
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_write_fake_gcov(run_fail, "MAIN", {167: 0, 265: 1})
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# 子程序：line 167 从未执行（count=0）——与主程序行号碰撞
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_write_fake_gcov(run_normal, "SUB", {167: 0, 10: 1})
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_write_fake_gcov(run_fail, "SUB", {167: 0, 10: 1})
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main = _merge_run_dirs_gcov(tmp_path, "MAIN", gcov_func=_fake_gcov_func)
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sub = _merge_run_dirs_gcov(tmp_path, "SUB", gcov_func=_fake_gcov_func)
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# 合并后主程序 167 必须保持 25
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assert main[167] == 25, f"main line 167 corrupted: {main[167]}"
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assert sub[167] == 0
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# 旧 bug 行为演示：若把子程序并入主程序字典，167 会被覆盖为 0
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buggy = dict(main)
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buggy.update(sub)
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assert buggy[167] == 0, "demonstrates the corruption the fix avoids"
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# 修复不变量：子程序数据独立保存，主程序字典完好
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assert main[167] == 25
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def test_merge_run_dirs_takes_max_count(tmp_path):
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r1 = tmp_path / "run_a"; r1.mkdir()
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r2 = tmp_path / "run_b"; r2.mkdir()
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_write_fake_gcov(r1, "MAIN", {167: 25})
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_write_fake_gcov(r2, "MAIN", {167: 3})
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merged = _merge_run_dirs_gcov(tmp_path, "MAIN", gcov_func=_fake_gcov_func)
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assert merged[167] == 25
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