feat: add automated Nexus zone screenshot capture script (#1492)

Co-authored-by: Alexander Whitestone <alexander@alexanderwhitestone.com>
Co-committed-by: Alexander Whitestone <alexander@alexanderwhitestone.com>

tests/infrastructure/test_multimodal.py

@@ -3,6 +3,8 @@
 import json
 from unittest.mock import MagicMock, patch
 
+import pytest
+
 from infrastructure.models.multimodal import (
     DEFAULT_FALLBACK_CHAINS,
     KNOWN_MODEL_CAPABILITIES,
@@ -10,11 +12,14 @@ from infrastructure.models.multimodal import (
     ModelInfo,
     MultiModalManager,
     get_model_for_capability,
+    get_multimodal_manager,
     model_supports_tools,
     model_supports_vision,
     pull_model_with_fallback,
 )
 
+pytestmark = pytest.mark.unit
+
 # ---------------------------------------------------------------------------
 # ModelCapability enum
 # ---------------------------------------------------------------------------
@@ -507,3 +512,41 @@ class TestModelInfoPopulation:
         assert info.is_pulled is True
         assert info.size_mb == 4 * 1024  # 4 GiB in MiB
         assert info.description == "test"
+
+
+# ---------------------------------------------------------------------------
+# _pull_model — non-200 status branch (lines 480-481)
+# ---------------------------------------------------------------------------
+
+
+class TestPullModelNon200:
+    def test_pull_non_200_returns_false(self):
+        mgr = _make_manager([])
+        pull_resp = MagicMock()
+        pull_resp.__enter__ = MagicMock(return_value=pull_resp)
+        pull_resp.__exit__ = MagicMock(return_value=False)
+        pull_resp.status = 500  # Non-200 response
+
+        with patch("urllib.request.urlopen", return_value=pull_resp):
+            assert mgr._pull_model("some-model:1b") is False
+
+
+# ---------------------------------------------------------------------------
+# get_multimodal_manager singleton (line 552)
+# ---------------------------------------------------------------------------
+
+
+class TestGetMultimodalManager:
+    def test_creates_singleton(self):
+        with (
+            patch("infrastructure.models.multimodal._multimodal_manager", None),
+            patch("urllib.request.urlopen", side_effect=ConnectionError("no ollama")),
+        ):
+            mgr = get_multimodal_manager()
+            assert isinstance(mgr, MultiModalManager)
+
+    def test_returns_existing_singleton(self):
+        sentinel = _make_manager(None)
+        with patch("infrastructure.models.multimodal._multimodal_manager", sentinel):
+            mgr = get_multimodal_manager()
+            assert mgr is sentinel