Allow heading tags (h1-h6) in ContentSanitizer so news editor headings render

services/enhance-worker/tests/test_realesrgan_validation.py

@@ -0,0 +1,50 @@
+from pathlib import Path
+
+import pytest
+
+from app.config import Settings
+from app.engines.base import UpscaleEngineUnavailable
+from app.upscaler import build_upscaler
+
+
+def test_invalid_engine_returns_degraded_health(tmp_path: Path) -> None:
+    upscaler = build_upscaler(
+        Settings(
+            engine="broken-engine",
+            token="secret-token",
+            tmp_dir=str(tmp_path / "tmp"),
+            output_dir=str(tmp_path / "output"),
+        )
+    )
+
+    health = upscaler.health()
+
+    assert health.status == "degraded"
+    assert health.models_loaded is False
+
+
+def test_missing_model_raises_safe_error_when_fallback_disabled(tmp_path: Path) -> None:
+    binary = tmp_path / "bin" / "realesrgan-ncnn-vulkan"
+    binary.parent.mkdir(parents=True)
+    binary.write_text("#!/bin/sh\nexit 0\n", encoding="utf-8")
+    binary.chmod(0o755)
+
+    model_dir = tmp_path / "models"
+    model_dir.mkdir(parents=True)
+    (model_dir / "realesrgan-x4plus.param").write_text("param", encoding="utf-8")
+    (model_dir / "realesrgan-x4plus.bin").write_text("bin", encoding="utf-8")
+
+    engine = build_upscaler(
+        Settings(
+            engine="realesrgan-ncnn",
+            token="secret-token",
+            tmp_dir=str(tmp_path / "tmp"),
+            output_dir=str(tmp_path / "output"),
+            realesrgan_bin=str(binary),
+            realesrgan_model_dir=str(model_dir),
+            realesrgan_allow_model_fallback=False,
+        )
+    )
+
+    with pytest.raises(UpscaleEngineUnavailable, match="Upscale engine is not available"):
+        engine.resolve_model("illustration")