Merge "Add test for empty stub generation."

        """)

        self.assertEqual(expected_version, version_file.getvalue())

    def test_empty_stub(self) -> None:

        """Tests that empty stubs can be generated.

        This is not a common case, but libraries whose only behavior is to

        interpose symbols to alter existing behavior do not need to expose

        their interposing symbols as API, so it's possible for the stub to be

        empty while still needing a stub to link against. libsigchain is an

        example of this.

        """

        input_file = io.StringIO(textwrap.dedent("""\

            VERSION_1 {

                local:

                    *;

            };

        """))

        parser = symbolfile.SymbolFileParser(input_file, {}, Arch('arm'),

                                             9, llndk=False, apex=True)

        versions = parser.parse()

        src_file = io.StringIO()

        version_file = io.StringIO()

        symbol_list_file = io.StringIO()

        generator = ndkstubgen.Generator(src_file,

                                         version_file,

                                         symbol_list_file,

                                         Arch('arm'),

                                         9,

                                         llndk=False,

                                         apex=True)

        generator.write(versions)

        self.assertEqual('', src_file.getvalue())

        self.assertEqual('', version_file.getvalue())

def main() -> None:

    suite = unittest.TestLoader().loadTestsFromName(__name__)