How to use the auditwheel.elfutils.elf_find_ucs2_symbols function in auditwheel

def test_elf_find_ucs2_symbols(self):
        # GIVEN
        elf = Mock()

        asunicode = MockSymbol("PyUnicodeUCS2_AsUnicode",
                               st_shndx="SHN_UNDEF",
                               st_info=dict(type="STT_FUNC"))
        symbols = (asunicode, Mock())
        symbols[1].name = "foobar"
        elf.get_section_by_name.return_value.iter_symbols.return_value = symbols

        # WHEN
        symbols = list(elf_find_ucs2_symbols(elf))

        # THEN
        assert len(symbols) == 1
        assert symbols[0] == 'PyUnicodeUCS2_AsUnicode'

def test_elf_find_ucs2_symbols_no_symbol(self):
        # GIVEN
        elf = Mock()

        symbols = (MockSymbol("FooSymbol"),)
        elf.get_section_by_name.return_value.iter_symbols.return_value = symbols

        # WHEN/THEN
        symbols = list(elf_find_ucs2_symbols(elf))
        assert len(symbols) == 0

elftree = lddtree(fn)

                for key, value in elf_find_versioned_symbols(elf):
                    log.debug('key %s, value %s', key, value)
                    versioned_symbols[key].add(value)

                is_py_ext, py_ver = elf_is_python_extension(fn, elf)

                # If the ELF is a Python extention, we definitely need to
                # include its external dependencies.
                if is_py_ext:
                    full_elftree[fn] = elftree
                    uses_PyFPE_jbuf |= elf_references_PyFPE_jbuf(elf)
                    if py_ver == 2:
                        uses_ucs2_symbols |= any(
                            True for _ in elf_find_ucs2_symbols(elf))
                    full_external_refs[fn] = lddtree_external_references(
                        elftree,
                        ctx.path)
                else:
                    # If the ELF is not a Python extension, it might be
                    # included in the wheel already because auditwheel repair
                    # vendored it, so we will check whether we should include
                    # its internal references later.
                    nonpy_elftree[fn] = elftree

        if not platform_wheel:
            raise NonPlatformWheel

        # If at least one shared library exists in purelib, raise an error
        if shared_libraries_in_purelib:
            raise RuntimeError(