feat(insta-lab): card_renderer with Jinja + Playwright (1080x1350)

insta-lab/tests/test_card_renderer.py

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+import os
+import tempfile
+
+import pytest
+
+from app import db as db_module
+from app import card_renderer
+
+
+@pytest.fixture
+def tmp_db_and_dirs(monkeypatch, tmp_path):
+    fd, path = tempfile.mkstemp(suffix=".db")
+    os.close(fd)
+    monkeypatch.setattr(db_module, "DB_PATH", path)
+    monkeypatch.setattr(card_renderer, "CARDS_DIR", str(tmp_path / "cards"))
+    db_module.init_db()
+    yield path
+    import gc
+    gc.collect()
+    for ext in ("", "-wal", "-shm"):
+        try:
+            os.remove(path + ext)
+        except OSError:
+            pass
+
+
+def _seed_slate() -> int:
+    return db_module.add_card_slate({
+        "keyword": "테스트",
+        "category": "economy",
+        "status": "draft",
+        "cover_copy": {"headline": "커버 헤드라인", "body": "서브카피", "accent_color": "#0F62FE"},
+        "body_copies": [{"headline": f"본문 {i+1}", "body": f"내용 {i+1}"} for i in range(8)],
+        "cta_copy": {"headline": "마무리", "body": "감사합니다", "cta": "팔로우"},
+    })
+
+
+@pytest.mark.asyncio
+async def test_render_slate_produces_ten_pngs(tmp_db_and_dirs):
+    sid = _seed_slate()
+    paths = await card_renderer.render_slate(sid)
+    assert len(paths) == 10
+    for p in paths:
+        assert os.path.exists(p)
+        assert os.path.getsize(p) > 1000  # > 1 KB sanity
+    db_module.update_slate_status(sid, "rendered")
+    assets = db_module.list_card_assets(sid)
+    assert {a["page_index"] for a in assets} == set(range(1, 11))