fix

+from pathlib import Path
+
+from openpyxl import load_workbook
+
+from check_record_titles import combine_rows, fetch_crawler_rows, fetch_record_names, write_excel
+
+
+class Cursor:
+    def __init__(self, rows):
+        self.rows = rows
+        self.calls = []
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        return False
+
+    def execute(self, sql, params=None):
+        self.calls.append((sql, params))
+
+    def fetchall(self):
+        return self.rows
+
+
+class Connection:
+    def __init__(self, cursor_rows):
+        self.cursors = [Cursor(rows) for rows in cursor_rows]
+
+    def cursor(self):
+        return self.cursors.pop(0)
+
+
+def test_fetch_crawler_rows_joins_all_platform_tables():
+    connection = Connection([[(10, "1", 101, "recording-1", "同名")]])
+    cursor = connection.cursors[0]
+
+    rows = fetch_crawler_rows(connection, "yinyan_song_records")
+
+    assert rows == [{
+        "record_id": 10,
+        "platform": "1",
+        "platform_song_id": 101,
+        "recording_id": "recording-1",
+        "title": "同名",
+    }]
+    assert "WHERE ysr.is_archive_push = TRUE" in cursor.calls[0][0]
+
+
+def test_fetch_crawler_rows_rejects_unknown_table():
+    connection = Connection([])
+
+    try:
+        fetch_crawler_rows(connection, "unsafe_table")
+    except ValueError as error:
+        assert "不支持" in str(error)
+    else:
+        raise AssertionError("应拒绝非白名单表")
+
+
+def test_fetch_record_names_batches_queries():
+    connection = Connection([
+        [{"id": 1, "record_name": "甲"}, {"id": 2, "record_name": "乙"}],
+        [{"id": 3, "record_name": "丙"}],
+    ])
+
+    names = fetch_record_names(connection, [3, 1, 2, 2], batch_size=2)
+
+    assert names == {1: "甲", 2: "乙", 3: "丙"}
+
+
+def test_excel_marks_only_exact_non_null_matches_green(tmp_path: Path):
+    crawler_rows = [
+        {"record_id": 1, "platform": "1", "platform_song_id": 101, "recording_id": "r1", "title": "相同"},
+        {"record_id": 2, "platform": "2", "platform_song_id": 102, "recording_id": "r2", "title": " 名称 "},
+        {"record_id": 3, "platform": "4", "platform_song_id": 103, "recording_id": None, "title": None},
+    ]
+    rows = combine_rows(crawler_rows, {1: "相同", 2: "名称", 3: None})
+    output = tmp_path / "check.xlsx"
+
+    write_excel(rows, output)
+
+    worksheet = load_workbook(output).active
+    assert [worksheet.cell(1, column).value for column in range(1, 7)] == [
+        "record_id", "record_name", "title", "platform", "platform_song_id", "recording_id",
+    ]
+    assert worksheet["A2"].fill.fgColor.rgb == "00C6EFCE"
+    assert worksheet["A3"].fill.fill_type is None
+    assert worksheet["A4"].fill.fill_type is None