feat: 提交热榜评论分析工具 MVP 基线

tests/unit/test_export.py

@@ -0,0 +1,19 @@
+from app.services.export_service import labels_to_text, safe_csv_field, safe_filename
+
+
+def test_labels_to_text_joins_json_array_with_chinese_comma():
+    assert labels_to_text('["认可", "质量好"]') == "认可，质量好"
+    assert labels_to_text("bad-json") == ""
+
+
+def test_safe_csv_field_prevents_formula_injection_and_newlines():
+    assert safe_csv_field("=1+1") == "'=1+1"
+    assert safe_csv_field("hello\nworld") == "hello world"
+
+
+def test_safe_filename_replaces_illegal_chars_and_truncates_keyword():
+    filename = safe_filename("douyin", "task", "a/b:c*d?e<f>g|很长很长很长很长很长")
+
+    assert "/" not in filename
+    assert "__" not in filename
+    assert filename.endswith(".csv")