scripts/gconv_strip_unittest.py

# Copyright 2018 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Test gconv_strip."""

import os

from chromite.lib import cros_test_lib
from chromite.lib import osutils
from chromite.scripts import gconv_strip


pytestmark = cros_test_lib.pytestmark_inside_only


class GconvStriptTest(cros_test_lib.MockTempDirTestCase):
    """Tests for gconv_strip script."""

    def testMultipleStringMatch(self):
        self.assertEqual(
            gconv_strip.MultipleStringMatch(
                [b"hell", b"a", b"z", b"k", b"spec"],
                b"hello_from a very special place",
            ),
            [True, True, False, False, True],
        )

    def testModuleRewrite(self):
        tmp_gconv_module = os.path.join(self.tempdir, "gconv-modules")

        data = """
#      from          to            module         cost
alias  FOO           charset_foo
alias  BAR           charset_bar
module charset_foo   charset_bar   UNUSED_MODULE

#      from          to            module         cost
alias  CHAR_A        charset_A
alias  EUROPE        charset_B
module charset_A     charset_B     USED_MODULE
module charset_foo   charset_A     USED_MODULE
"""
        osutils.WriteFile(tmp_gconv_module, data)

        gmods = gconv_strip.GconvModules(tmp_gconv_module)
        self.assertEqual(
            gmods.Load(),
            [
                "BAR",
                "CHAR_A",
                "EUROPE",
                "FOO",
                "charset_A",
                "charset_B",
                "charset_bar",
                "charset_foo",
            ],
        )
        self.PatchObject(gconv_strip.lddtree, "ParseELF", return_value={})

        class _StubStat(object):
            """Fake for lstat."""

            st_size = 0

        self.PatchObject(gconv_strip.os, "lstat", return_value=_StubStat)
        self.PatchObject(gconv_strip.os, "unlink")
        gmods.Rewrite(["charset_A", "charset_B"], dry_run=False)

        expected = """
#      from          to            module         cost
alias  FOO           charset_foo

#      from          to            module         cost
alias  CHAR_A        charset_A
alias  EUROPE        charset_B
module charset_A     charset_B     USED_MODULE
module charset_foo   charset_A     USED_MODULE
"""

        content = osutils.ReadFile(tmp_gconv_module)
        self.assertEqual(content, expected)