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=MagicMock(x=800.0, y=600.0))
  mock_imgui.ImVec2 = lambda *a: ("ImVec2", a)
  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_imgui.begin_child.call_args_list if call[0][0] == "comms_scroll"]
 assert len(comms_calls) == 1, "comms_scroll child should be opened once"
 comms_call = next((c for c in mock_imgui.begin_child.call_args_list if c[0][0] == "comms_scroll"), None)
 assert comms_call is not None, "comms_scroll child should be among begin_child calls"
 args, _ = comms_call
 size_arg = args[1]
 if isinstance(size_arg, tuple) and len(size_arg) == 2 and isinstance(size_arg[0], str):
  actual = size_arg[1]
 else:
  actual = size_arg
 assert actual != (0, 0), f"comms_scroll child should use explicit content region size, got {actual}"