How to use the rpmlint.pkg.FakePkg function in rpmlint

def get_tested_spec_package(name):
    filename = Path(name).name + '.spec'
    pkg_path = list(get_tested_path(name).parent.glob(filename))[0]
    return FakePkg(pkg_path)

def test_lto_archive_text(binariescheck):
    output, test = binariescheck
    test.run_elf_checks(FakePkg('fake'), get_full_path('stripped-lto.a'), 'x.a')
    out = output.print_results(output.results)
    assert 'E: lto-no-text-in-archive' in out
    assert 'E: static-library-without-debuginfo' in out

def test_unused_dependency_in_package_for_executable(binariescheck):
    output, test = binariescheck
    test.run_elf_checks(FakePkg('fake'), get_full_path('appletviewer'), '/usr/bin/appletviewer')
    assert not test.readelf_parser.parsing_failed_reason()
    assert not test.ldd_parser.parsing_failed_reason
    out = output.print_results(output.results)
    assert 'W: unused-direct-shlib-dependency ' in out

def test_lto_archive_preinit_array(binariescheck):
    output, test = binariescheck
    test.run_elf_checks(FakePkg('fake'), get_full_path('libclang_rt.asan-preinit-x86_64.a'), 'x.a')
    assert 'E: lto-no-text-in-archive' not in output.print_results(output.results)

def test_stripped_archive(binariescheck):
    output, test = binariescheck
    test.run_elf_checks(FakePkg('fake'), get_full_path('stripped-archive.a'), 'x.a')
    out = output.print_results(output.results)
    assert 'E: static-library-without-symtab' in out

def test_lto_archive_text_function_sections(binariescheck):
    output, test = binariescheck
    test.run_elf_checks(FakePkg('fake'), get_full_path('function-sections.a'), 'x.a')
    assert 'E: lto-no-text-in-archive' not in output.print_results(output.results)

def test_executable_stack(binariescheck):
    output, test = binariescheck
    test.run_elf_checks(FakePkg('fake'), get_full_path('executable-stack'), 'a.out')
    assert 'E: executable-stack' in output.results[0]

def validate_file(self, pname):
        try:
            if pname.suffix == '.rpm' or pname.suffix == '.spm':
                with Pkg(pname, self.config.configuration['ExtractDir']) as pkg:
                    self.run_checks(pkg)
            elif pname.suffix == '.spec':
                with FakePkg(pname) as pkg:
                    self.run_spec_checks(pkg)
        except Exception as e:
            print_warning(f'(none): E: while reading {pname}: {e}')

if fname.endswith('.spec'):
                self._spec_file = pkgfile.path
                self._spec_name = pkgfile.name
                if fname == pkg.name + '.spec':
                    wrong_spec = False
                    break
                else:
                    wrong_spec = True

        # method call
        self._check_no_spec_file(pkg)
        self._check_invalid_spec_name(pkg, wrong_spec)

        if self._spec_file:
            # check content of spec file
            with Pkg.FakePkg(self._spec_file) as package:
                self.check_spec(package)