Improve coverage

tests/test_exceptions.py

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+"""Tests for custom exceptions."""
+
+import pytest
+
+from capa_de_integracion.exceptions import FirestorePersistenceError
+
+
+def test_firestore_persistence_error_basic():
+    """Test FirestorePersistenceError with message only."""
+    error = FirestorePersistenceError("Test error message")
+    assert str(error) == "Test error message"
+    assert error.cause is None
+
+
+def test_firestore_persistence_error_with_cause():
+    """Test FirestorePersistenceError with cause exception."""
+    cause = ValueError("Original error")
+    error = FirestorePersistenceError("Wrapped error", cause=cause)
+
+    assert str(error) == "Wrapped error"
+    assert error.cause is cause
+    assert isinstance(error.cause, ValueError)
+    assert str(error.cause) == "Original error"
+
+
+def test_firestore_persistence_error_inheritance():
+    """Test that FirestorePersistenceError is an Exception."""
+    error = FirestorePersistenceError("Test")
+    assert isinstance(error, Exception)
+
+
+def test_firestore_persistence_error_can_be_raised():
+    """Test that the exception can be raised and caught."""
+    with pytest.raises(FirestorePersistenceError) as exc_info:
+        raise FirestorePersistenceError("Test error")
+
+    assert str(exc_info.value) == "Test error"