"""Helpers for unit tests."""

from typing import cast

from lxml import etree


class Helpers:
    """Helpers for tests."""

    @staticmethod
    def print_xml(element) -> str:
        """Render the element to an XML string."""
        etree.indent(element, space='    ')

        document_buffer = etree.tostring(
            element,
            encoding='utf-8',
            pretty_print=True,
        )
        stringified = cast(bytes, document_buffer).decode('utf-8')

        # Remove namespace declarations from the output for cleaner assertions
        import re
        stringified = re.sub(r' xmlns:[^=]+="[^"]+"', '', stringified)

        return stringified.strip()