fix(cli): always persist white report before black-box run; handle empty --black-box=

cobol_testgen/__init__.py

@@ -1421,7 +1421,8 @@ def _extract_black_box_args(args: list) -> tuple[bool, str | None]:
             continue
         if a.startswith('--black-box='):
             do_black_box = True
-            black_box_arg = a.split('=', 1)[1]
+            val = a.split('=', 1)[1]
+            black_box_arg = val or None
             args.pop(i)
             continue
         i += 1
@@ -1910,7 +1911,7 @@ def main():
                 multi_write_fds=multi_write_fds,
                 skip_records=skip_records,
                 skip_term_types=skip_term_types,
-                write_report=not do_black_box,
+                write_report=True,
             )
 
             passed = sum(1 for r in group_results if r.passed)
@@ -1929,14 +1930,8 @@ def main():
             bb_groups = load_black_box_groups(bb_dir, fd_fields, select_info, fields_dict)
             if not bb_groups:
                 logger.warning(f"  --black-box: 未在 {bb_dir} 找到可用黑盒数据，跳过")
-                if white_java_reports:
-                    try:
-                        _write_java_test_report(str(prog_outdir), filepath.stem,
-                                                list(group_results),
-                                                list(white_java_reports))
-                    except Exception as e:  # noqa: BLE001
-                        logger.warning(f"  测试报告生成失败: {e}")
             else:
+                try:
                     _bb_temp = temp_dir or str(prog_outdir / '.gcov_cache')
                     bb_results, bb_java_reports = run_external_groups(
                         filepath.stem, str(prog_outdir), _bb_temp,
@@ -1949,11 +1944,10 @@ def main():
                     all_results = list(group_results) + list(bb_results)
                     all_reports = list(white_java_reports) + list(bb_java_reports)
                     if all_reports:
-                    try:
                         _write_java_test_report(str(prog_outdir), filepath.stem,
                                                 all_results, all_reports)
                 except Exception as e:  # noqa: BLE001
-                        logger.warning(f"  测试报告生成失败: {e}")
+                    logger.warning(f"  黑盒运行/比对失败，保留白盒报告: {e}")
 
         if do_run and proc_div and _HAVE_RUNNER:
             run_and_compare(

tests/cobol_testgen/test_cli_blackbox.py

@@ -64,3 +64,11 @@ def test_no_black_box_resets_arg():
     assert do is False
     assert arg is None
     assert args == ["src.cbl"]
+
+
+def test_black_box_equals_empty_value():
+    args = ["--black-box=", "src.cbl"]
+    do, arg = _extract_black_box_args(args)
+    assert do is True
+    assert arg is None
+    assert args == ["src.cbl"]