from unittest.mock import patch, MagicMock
from src.gui_2 import render_comms_history_panel

def test_comms_history_renders_all_entries_not_just_early_subset(app_instance):
 entries = [{"direction": "in", "kind": "response", "provider": "x", "model": "y", "ts": f"00:00:0{i}", "payload": {"text": f"Entry {i} content"}} for i in range(50)]
 app_instance._comms_log_cache = entries
 app_instance.is_viewing_prior_session = False
 app_instance.perf_profiling_enabled = False
 app_instance._scroll_comms_to_bottom = False
 with patch("src.gui_2.imgui") as mock_imgui, patch("src.gui_2.imscope") as mock_imscope:
  mock_imgui.text_colored = MagicMock()
  mock_imgui.text = MagicMock()
  mock_imgui.same_line = MagicMock()
  mock_imgui.separator = MagicMock()
  mock_imgui.begin_child = MagicMock(return_value=True)
  mock_imgui.end_child = MagicMock()
  mock_imgui.button = MagicMock(return_value=False)
  mock_imgui.push_style_color = MagicMock()
  mock_imgui.pop_style_color = MagicMock()
  mock_imgui.set_scroll_here_y = MagicMock()
  mock_imgui.get_content_region_avail = MagicMock(return_value=type("P", (), {"x": 800.0, "y": 600.0})())
  def _imvec2(x, y=0):
   m = MagicMock(); m.x = float(x); m.y = float(y); return m
  mock_imgui.ImVec2 = _imvec2
  mock_imgui.ImVec4 = lambda *a: ("ImVec4", a)
  mock_imscope.child = MagicMock()
  mock_imscope.child.return_value.__enter__ = MagicMock()
  mock_imscope.child.return_value.__exit__ = MagicMock()
  mock_imscope.style_color = MagicMock()
  mock_imscope.style_color.return_value.__enter__ = MagicMock()
  mock_imscope.style_color.return_value.__exit__ = MagicMock()
  app_instance.controller = MagicMock()
  app_instance.controller.event_queue.put = MagicMock()
  app_instance.cb_load_prior_log = MagicMock()
  try:
   render_comms_history_panel(app_instance)
  except Exception as e:
   import pytest
   pytest.fail(f"render_comms_history_panel raised: {e}")
  comms_calls = [call for call in mock_imscope.child.call_args_list if call[0][0] == "comms_scroll"]
  assert len(comms_calls) == 1, "comms_scroll child should be opened once"
  comms_call = comms_calls[0]
  args, _ = comms_call
  size_arg = args[1] if len(args) > 1 else 0
  if hasattr(size_arg, 'x'):
   size_x, size_y = size_arg.x, size_arg.y
  else:
   size_x = size_arg
   size_y = 0
  assert size_x > 0 and size_y > 0, f"comms_scroll child should use explicit content region size, got ({size_x}, {size_y})"
