feat(token-viz): Phase 2 — trim warning, Gemini/Anthropic cache status display

tests/test_token_viz.py

@@ -113,3 +113,44 @@ def test_render_token_budget_panel_empty_stats_no_crash(app_instance: App) -> No
  # We can't render ImGui in tests, so just verify the guard condition logic
  # by checking the method exists and _token_stats is empty (early-return path)
  assert not app_instance._token_stats  # falsy — method would return early
+
+
+# --- Trim warning logic ---
+
+def test_would_trim_boundary_exact() -> None:
+ """would_trim is False when headroom == 20000 (threshold is strictly < 20000)."""
+ base = {"provider": "test", "limit": 100000, "current": 80000, "percentage": 80.0}
+ result = _add_bleed_derived(base)
+ assert result["headroom_tokens"] == 20000
+ assert result["would_trim"] is False  # headroom < 20000 is False at exactly 20000
+
+
+def test_would_trim_just_below_threshold() -> None:
+ base = {"provider": "test", "limit": 100000, "current": 80001, "percentage": 80.0}
+ result = _add_bleed_derived(base)
+ assert result["headroom_tokens"] == 19999
+ assert result["would_trim"] is True
+
+
+def test_would_trim_just_above_threshold() -> None:
+ base = {"provider": "test", "limit": 100000, "current": 79999, "percentage": 80.0}
+ result = _add_bleed_derived(base)
+ assert result["headroom_tokens"] == 20001
+ assert result["would_trim"] is False
+
+
+# --- Cache status fields available from ai_client ---
+
+def test_gemini_cache_fields_accessible() -> None:
+ """_gemini_cache, _gemini_cache_created_at, _GEMINI_CACHE_TTL must be accessible."""
+ assert hasattr(ai_client, "_gemini_cache")
+ assert hasattr(ai_client, "_gemini_cache_created_at")
+ assert hasattr(ai_client, "_GEMINI_CACHE_TTL")
+ assert isinstance(ai_client._GEMINI_CACHE_TTL, int)
+ assert ai_client._GEMINI_CACHE_TTL > 0
+
+
+def test_anthropic_history_lock_accessible() -> None:
+ """_anthropic_history_lock must be accessible for cache hint rendering."""
+ assert hasattr(ai_client, "_anthropic_history_lock")
+ assert hasattr(ai_client, "_anthropic_history")