feat(screener): ai_news telegram message builder (MarkdownV2 + cost line)

stock-lab/tests/test_ai_news_telegram.py

@@ -0,0 +1,54 @@
+from app.screener.ai_news import telegram as tg
+
+
+def _row(ticker, score, reason="r"):
+    return {"ticker": ticker, "score_raw": score, "reason": reason,
+            "news_count": 5, "tokens_input": 100, "tokens_output": 20,
+            "model": "m"}
+
+
+def test_build_message_includes_top_sections():
+    msg = tg.build_message(
+        asof="2026-05-13",
+        top_pos=[_row("005930", 8.5, "HBM 호재")],
+        top_neg=[_row("373220", -6.3, "수주 지연")],
+        tokens_input=10000, tokens_output=2000,
+    )
+    assert "AI 뉴스 분석" in msg
+    assert "호재 Top" in msg
+    assert "악재 Top" in msg
+    assert "005930" in msg
+    assert "8.5" in msg
+    assert "HBM" in msg
+    assert "373220" in msg
+
+
+def test_build_message_escapes_markdownv2_specials():
+    msg = tg.build_message(
+        asof="2026-05-13",
+        top_pos=[_row("005930", 3.0, "테스트(괄호) [대괄호]")],
+        top_neg=[],
+        tokens_input=100, tokens_output=20,
+    )
+    # MarkdownV2 특수문자 ( ) [ ] 이 escape 되어야 함
+    assert r"\(" in msg or r"\)" in msg
+    assert r"\[" in msg or r"\]" in msg
+
+
+def test_build_message_cost_won_line():
+    msg = tg.build_message(
+        asof="2026-05-13", top_pos=[], top_neg=[],
+        tokens_input=10000, tokens_output=2000,
+    )
+    # tokens_input × 0.0013 + tokens_output × 0.0065 = 13 + 13 = ₩26
+    assert "₩26" in msg or "₩ 26" in msg or "₩" in msg
+
+
+def test_build_message_empty_lists():
+    msg = tg.build_message(
+        asof="2026-05-13", top_pos=[], top_neg=[],
+        tokens_input=0, tokens_output=0,
+    )
+    # 빈 리스트라도 헤더는 있어야 함
+    assert "호재 Top" in msg
+    assert "악재 Top" in msg