feat(tests): add comprehensive test suite for backend functionality, including database, configuration, and telemetry utilities

tests/backend/test_meshchat_utils.py

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+import pytest
+import os
+import shutil
+import tempfile
+from unittest.mock import MagicMock, patch
+from meshchatx.meshchat import ReticulumMeshChat
+
+
+@pytest.fixture
+def temp_dir():
+    dir_path = tempfile.mkdtemp()
+    yield dir_path
+    if os.path.exists(dir_path):
+        shutil.rmtree(dir_path)
+
+
+@pytest.fixture
+def mock_app(temp_dir):
+    with (
+        patch("meshchatx.meshchat.Database"),
+        patch("meshchatx.meshchat.ConfigManager"),
+        patch("meshchatx.meshchat.MessageHandler"),
+        patch("meshchatx.meshchat.AnnounceManager"),
+        patch("meshchatx.meshchat.ArchiverManager"),
+        patch("meshchatx.meshchat.MapManager"),
+        patch("meshchatx.meshchat.TelephoneManager"),
+        patch("meshchatx.meshchat.VoicemailManager"),
+        patch("meshchatx.meshchat.RingtoneManager"),
+        patch("meshchatx.meshchat.RNCPHandler"),
+        patch("meshchatx.meshchat.RNStatusHandler"),
+        patch("meshchatx.meshchat.RNProbeHandler"),
+        patch("meshchatx.meshchat.TranslatorHandler"),
+        patch("LXMF.LXMRouter"),
+        patch("RNS.Identity") as mock_identity,
+        patch("RNS.Reticulum"),
+        patch("RNS.Transport"),
+        patch("threading.Thread"),
+    ):
+        mock_id = MagicMock()
+        # Use a real bytes object for hash so .hex() works naturally
+        mock_id.hash = b"test_hash_32_bytes_long_01234567"
+        mock_id.get_private_key.return_value = b"test_private_key"
+        mock_identity.return_value = mock_id
+
+        app = ReticulumMeshChat(
+            identity=mock_id,
+            storage_dir=temp_dir,
+            reticulum_config_dir=temp_dir,
+        )
+        return app
+
+
+def test_get_interfaces_snapshot(mock_app):
+    # Setup mock reticulum config
+    mock_reticulum = MagicMock()
+    mock_reticulum.config = {
+        "interfaces": {
+            "Iface1": {"type": "TCP", "enabled": "yes"},
+            "Iface2": {"type": "RNode", "enabled": "no"},
+        }
+    }
+    mock_app.reticulum = mock_reticulum
+
+    snapshot = mock_app._get_interfaces_snapshot()
+
+    assert len(snapshot) == 2
+    assert snapshot["Iface1"]["type"] == "TCP"
+    assert snapshot["Iface2"]["enabled"] == "no"
+    # Ensure it's a deep copy (not the same object)
+    assert snapshot["Iface1"] is not mock_reticulum.config["interfaces"]["Iface1"]
+
+
+def test_write_reticulum_config_success(mock_app):
+    mock_reticulum = MagicMock()
+    mock_app.reticulum = mock_reticulum
+
+    result = mock_app._write_reticulum_config()
+
+    assert result is True
+    mock_reticulum.config.write.assert_called_once()
+
+
+def test_write_reticulum_config_no_reticulum(mock_app):
+    if hasattr(mock_app, "reticulum"):
+        del mock_app.reticulum
+
+    result = mock_app._write_reticulum_config()
+    assert result is False
+
+
+def test_write_reticulum_config_failure(mock_app):
+    mock_reticulum = MagicMock()
+    mock_reticulum.config.write.side_effect = Exception("Write failed")
+    mock_app.reticulum = mock_reticulum
+
+    result = mock_app._write_reticulum_config()
+    assert result is False