glib/gio/tests/codegen.py

#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# Copyright © 2018, 2019 Endless Mobile, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA  02110-1301  USA

"""Integration tests for gdbus-codegen utility."""

import collections
import os
import shutil
import subprocess
import sys
import tempfile
import textwrap
import unittest

import taptestrunner


Result = collections.namedtuple('Result', ('info', 'out', 'err', 'subs'))


class TestCodegen(unittest.TestCase):
    """Integration test for running gdbus-codegen.

    This can be run when installed or uninstalled. When uninstalled, it
    requires G_TEST_BUILDDIR and G_TEST_SRCDIR to be set.

    The idea with this test harness is to test the gdbus-codegen utility, its
    handling of command line arguments, its exit statuses, and its handling of
    various C source codes. In future we could split out tests for the core
    parsing and generation code of gdbus-codegen into separate unit tests, and
    just test command line behaviour in this integration test.
    """
    # Track the cwd, we want to back out to that to clean up our tempdir
    cwd = ''

    def setUp(self):
        self.timeout_seconds = 10  # seconds per test
        self.tmpdir = tempfile.TemporaryDirectory()
        self.cwd = os.getcwd()
        os.chdir(self.tmpdir.name)
        print('tmpdir:', self.tmpdir.name)
        if 'G_TEST_BUILDDIR' in os.environ:
            self.__codegen = \
                os.path.join(os.environ['G_TEST_BUILDDIR'], '..',
                             'gdbus-2.0', 'codegen', 'gdbus-codegen')
        else:
            self.__codegen = shutil.which('gdbus-codegen')
        print('codegen:', self.__codegen)

    def tearDown(self):
        os.chdir(self.cwd)
        self.tmpdir.cleanup()

    def runCodegen(self, *args):
        argv = [self.__codegen]

        # shebang lines are not supported on native
        # Windows consoles
        if os.name == 'nt':
            argv.insert(0, sys.executable)

        argv.extend(args)
        print('Running:', argv)

        env = os.environ.copy()
        env['LC_ALL'] = 'C.UTF-8'
        print('Environment:', env)

        # We want to ensure consistent line endings...
        info = subprocess.run(argv, timeout=self.timeout_seconds,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE,
                              env=env,
                              universal_newlines=True)
        info.check_returncode()
        out = info.stdout.strip()
        err = info.stderr.strip()

        # Known substitutions for standard boilerplate
        subs = {
            'standard_top_comment':
                '/*\n'
                ' * This file is generated by gdbus-codegen, do not modify it.\n'
                ' *\n'
                ' * The license of this code is the same as for the D-Bus interface description\n'
                ' * it was derived from. Note that it links to GLib, so must comply with the\n'
                ' * LGPL linking clauses.\n'
                ' */',
            'standard_config_h_include':
                '#ifdef HAVE_CONFIG_H\n'
                '#  include "config.h"\n'
                '#endif',
            'standard_header_includes':
                '#include <string.h>\n'
                '#ifdef G_OS_UNIX\n'
                '#  include <gio/gunixfdlist.h>\n'
                '#endif',
            'standard_typedefs_and_helpers':
                'typedef struct\n'
                '{\n'
                '  GDBusArgInfo parent_struct;\n'
                '  gboolean use_gvariant;\n'
                '} _ExtendedGDBusArgInfo;\n'
                '\n'
                'typedef struct\n'
                '{\n'
                '  GDBusMethodInfo parent_struct;\n'
                '  const gchar *signal_name;\n'
                '  gboolean pass_fdlist;\n'
                '} _ExtendedGDBusMethodInfo;\n'
                '\n'
                'typedef struct\n'
                '{\n'
                '  GDBusSignalInfo parent_struct;\n'
                '  const gchar *signal_name;\n'
                '} _ExtendedGDBusSignalInfo;\n'
                '\n'
                'typedef struct\n'
                '{\n'
                '  GDBusPropertyInfo parent_struct;\n'
                '  const gchar *hyphen_name;\n'
                '  guint use_gvariant : 1;\n'
                '  guint emits_changed_signal : 1;\n'
                '} _ExtendedGDBusPropertyInfo;\n'
                '\n'
                'typedef struct\n'
                '{\n'
                '  GDBusInterfaceInfo parent_struct;\n'
                '  const gchar *hyphen_name;\n'
                '} _ExtendedGDBusInterfaceInfo;\n'
                '\n'
                'typedef struct\n'
                '{\n'
                '  const _ExtendedGDBusPropertyInfo *info;\n'
                '  guint prop_id;\n'
                '  GValue orig_value; /* the value before the change */\n'
                '} ChangedProperty;\n'
                '\n'
                'static void\n'
                '_changed_property_free (ChangedProperty *data)\n'
                '{\n'
                '  g_value_unset (&data->orig_value);\n'
                '  g_free (data);\n'
                '}\n'
                '\n'
                'static gboolean\n'
                '_g_strv_equal0 (gchar **a, gchar **b)\n'
                '{\n'
                '  gboolean ret = FALSE;\n'
                '  guint n;\n'
                '  if (a == NULL && b == NULL)\n'
                '    {\n'
                '      ret = TRUE;\n'
                '      goto out;\n'
                '    }\n'
                '  if (a == NULL || b == NULL)\n'
                '    goto out;\n'
                '  if (g_strv_length (a) != g_strv_length (b))\n'
                '    goto out;\n'
                '  for (n = 0; a[n] != NULL; n++)\n'
                '    if (g_strcmp0 (a[n], b[n]) != 0)\n'
                '      goto out;\n'
                '  ret = TRUE;\n'
                'out:\n'
                '  return ret;\n'
                '}\n'
                '\n'
                'static gboolean\n'
                '_g_variant_equal0 (GVariant *a, GVariant *b)\n'
                '{\n'
                '  gboolean ret = FALSE;\n'
                '  if (a == NULL && b == NULL)\n'
                '    {\n'
                '      ret = TRUE;\n'
                '      goto out;\n'
                '    }\n'
                '  if (a == NULL || b == NULL)\n'
                '    goto out;\n'
                '  ret = g_variant_equal (a, b);\n'
                'out:\n'
                '  return ret;\n'
                '}\n'
                '\n'
                'G_GNUC_UNUSED static gboolean\n'
                '_g_value_equal (const GValue *a, const GValue *b)\n'
                '{\n'
                '  gboolean ret = FALSE;\n'
                '  g_assert (G_VALUE_TYPE (a) == G_VALUE_TYPE (b));\n'
                '  switch (G_VALUE_TYPE (a))\n'
                '    {\n'
                '      case G_TYPE_BOOLEAN:\n'
                '        ret = (g_value_get_boolean (a) == g_value_get_boolean (b));\n'
                '        break;\n'
                '      case G_TYPE_UCHAR:\n'
                '        ret = (g_value_get_uchar (a) == g_value_get_uchar (b));\n'
                '        break;\n'
                '      case G_TYPE_INT:\n'
                '        ret = (g_value_get_int (a) == g_value_get_int (b));\n'
                '        break;\n'
                '      case G_TYPE_UINT:\n'
                '        ret = (g_value_get_uint (a) == g_value_get_uint (b));\n'
                '        break;\n'
                '      case G_TYPE_INT64:\n'
                '        ret = (g_value_get_int64 (a) == g_value_get_int64 (b));\n'
                '        break;\n'
                '      case G_TYPE_UINT64:\n'
                '        ret = (g_value_get_uint64 (a) == g_value_get_uint64 (b));\n'
                '        break;\n'
                '      case G_TYPE_DOUBLE:\n'
                '        {\n'
                '          /* Avoid -Wfloat-equal warnings by doing a direct bit compare */\n'
                '          gdouble da = g_value_get_double (a);\n'
                '          gdouble db = g_value_get_double (b);\n'
                '          ret = memcmp (&da, &db, sizeof (gdouble)) == 0;\n'
                '        }\n'
                '        break;\n'
                '      case G_TYPE_STRING:\n'
                '        ret = (g_strcmp0 (g_value_get_string (a), g_value_get_string (b)) == 0);\n'
                '        break;\n'
                '      case G_TYPE_VARIANT:\n'
                '        ret = _g_variant_equal0 (g_value_get_variant (a), g_value_get_variant (b));\n'
                '        break;\n'
                '      default:\n'
                '        if (G_VALUE_TYPE (a) == G_TYPE_STRV)\n'
                '          ret = _g_strv_equal0 (g_value_get_boxed (a), g_value_get_boxed (b));\n'
                '        else\n'
                '          g_critical ("_g_value_equal() does not handle type %s", g_type_name (G_VALUE_TYPE (a)));\n'
                '        break;\n'
                '    }\n'
                '  return ret;\n'
                '}',
        }

        result = Result(info, out, err, subs)

        print('Output:', result.out)
        return result

    def runCodegenWithInterface(self, interface_contents, *args):
        with tempfile.NamedTemporaryFile(dir=self.tmpdir.name,
                                         suffix='.xml',
                                         delete=False) as interface_file:
            # Write out the interface.
            interface_file.write(interface_contents.encode('utf-8'))
            print(interface_file.name + ':', interface_contents)
            interface_file.flush()

            return self.runCodegen(interface_file.name, *args)

    def test_help(self):
        """Test the --help argument."""
        result = self.runCodegen('--help')
        self.assertIn('usage: gdbus-codegen', result.out)

    def test_no_args(self):
        """Test running with no arguments at all."""
        with self.assertRaises(subprocess.CalledProcessError):
            self.runCodegen()

    def test_empty_interface_header(self):
        """Test generating a header with an empty interface file."""
        result = self.runCodegenWithInterface('',
                                              '--output', '/dev/stdout',
                                              '--header')
        self.assertEqual('', result.err)
        self.assertEqual('''{standard_top_comment}

#ifndef __STDOUT__
#define __STDOUT__

#include <gio/gio.h>

G_BEGIN_DECLS


G_END_DECLS

#endif /* __STDOUT__ */'''.format(**result.subs),
                         result.out.strip())

    def test_empty_interface_body(self):
        """Test generating a body with an empty interface file."""
        result = self.runCodegenWithInterface('',
                                              '--output', '/dev/stdout',
                                              '--body')
        self.assertEqual('', result.err)
        self.assertEqual('''{standard_top_comment}

{standard_config_h_include}

#include "stdout.h"

{standard_header_includes}

{standard_typedefs_and_helpers}'''.format(**result.subs),
                         result.out.strip())

    def test_reproducible(self):
        """Test builds are reproducible regardless of file ordering."""
        xml_contents1 = '''
        <node>
          <interface name="com.acme.Coyote">
            <method name="Run"/>
            <method name="Sleep"/>
            <method name="Attack"/>
            <signal name="Surprised"/>
            <property name="Mood" type="s" access="read"/>
          </interface>
        </node>
        '''

        xml_contents2 = '''
        <node>
          <interface name="org.project.Bar.Frobnicator">
            <method name="RandomMethod"/>
          </interface>
        </node>
        '''

        with tempfile.NamedTemporaryFile(dir=self.tmpdir.name,
                                         suffix='1.xml', delete=False) as xml_file1, \
             tempfile.NamedTemporaryFile(dir=self.tmpdir.name,
                                         suffix='2.xml', delete=False) as xml_file2:
            # Write out the interfaces.
            xml_file1.write(xml_contents1.encode('utf-8'))
            xml_file2.write(xml_contents2.encode('utf-8'))

            xml_file1.flush()
            xml_file2.flush()

            # Repeat this for headers and bodies.
            for header_or_body in ['--header', '--body']:
                # Run gdbus-codegen with the interfaces in one order, and then
                # again in another order.
                result1 = self.runCodegen(xml_file1.name, xml_file2.name,
                                          '--output', '/dev/stdout',
                                          header_or_body)
                self.assertEqual('', result1.err)

                result2 = self.runCodegen(xml_file2.name, xml_file1.name,
                                          '--output', '/dev/stdout',
                                          header_or_body)
                self.assertEqual('', result2.err)

                # The output should be the same.
                self.assertEqual(result1.out, result2.out)

    def test_glib_min_version_invalid(self):
        """Test running with an invalid --glib-min-version."""
        with self.assertRaises(subprocess.CalledProcessError):
            self.runCodegenWithInterface('',
                                         '--output', '/dev/stdout',
                                         '--body',
                                         '--glib-min-version', 'hello mum')

    def test_glib_min_version_too_low(self):
        """Test running with a --glib-min-version which is too low (and hence
        probably a typo)."""
        with self.assertRaises(subprocess.CalledProcessError):
            self.runCodegenWithInterface('',
                                         '--output', '/dev/stdout',
                                         '--body',
                                         '--glib-min-version', '2.6')

    def test_glib_min_version_major_only(self):
        """Test running with a --glib-min-version which contains only a major version."""
        result = self.runCodegenWithInterface('',
                                              '--output', '/dev/stdout',
                                              '--header',
                                              '--glib-min-version', '3')
        self.assertEqual('', result.err)
        self.assertNotEqual('', result.out.strip())

    def test_glib_min_version_with_micro(self):
        """Test running with a --glib-min-version which contains a micro version."""
        result = self.runCodegenWithInterface('',
                                              '--output', '/dev/stdout',
                                              '--header',
                                              '--glib-min-version', '2.46.2')
        self.assertEqual('', result.err)
        self.assertNotEqual('', result.out.strip())

    def test_unix_fd_types_and_annotations(self):
        """Test an interface with `h` arguments, no annotation, and GLib < 2.64.

        See issue #1726.
        """
        interface_xml = '''
            <node>
              <interface name="FDPassing">
                <method name="HelloFD">
                  <annotation name="org.gtk.GDBus.C.UnixFD" value="1"/>
                  <arg name="greeting" direction="in" type="s"/>
                  <arg name="response" direction="out" type="s"/>
                </method>
                <method name="NoAnnotation">
                  <arg name="greeting" direction="in" type="h"/>
                  <arg name="greeting_locale" direction="in" type="s"/>
                  <arg name="response" direction="out" type="h"/>
                  <arg name="response_locale" direction="out" type="s"/>
                </method>
                <method name="NoAnnotationNested">
                  <arg name="files" type="a{sh}" direction="in"/>
                </method>
              </interface>
            </node>'''

        # Try without specifying --glib-min-version.
        result = self.runCodegenWithInterface(interface_xml,
                                              '--output', '/dev/stdout',
                                              '--header')
        self.assertEqual('', result.err)
        self.assertEqual(result.out.strip().count('GUnixFDList'), 6)

        # Specify an old --glib-min-version.
        result = self.runCodegenWithInterface(interface_xml,
                                              '--output', '/dev/stdout',
                                              '--header',
                                              '--glib-min-version', '2.32')
        self.assertEqual('', result.err)
        self.assertEqual(result.out.strip().count('GUnixFDList'), 6)

        # Specify a --glib-min-version ≥ 2.64. There should be more
        # mentions of `GUnixFDList` now, since the annotation is not needed to
        # trigger its use.
        result = self.runCodegenWithInterface(interface_xml,
                                              '--output', '/dev/stdout',
                                              '--header',
                                              '--glib-min-version', '2.64')
        self.assertEqual('', result.err)
        self.assertEqual(result.out.strip().count('GUnixFDList'), 18)


if __name__ == '__main__':
    unittest.main(testRunner=taptestrunner.TAPTestRunner())