summaryrefslogtreecommitdiff
path: root/scripts/kconfig/tests/conftest.py
blob: af8774a5697c8d0b83a577f4de702505242d74fd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2018 Masahiro Yamada <yamada.masahiro@socionext.com>
#

"""
Kconfig unit testing framework.

This provides fixture functions commonly used from test files.
"""

import os
import pytest
import shutil
import subprocess
import tempfile

CONF_PATH = os.path.abspath(os.path.join('scripts', 'kconfig', 'conf'))


class Conf:
    """Kconfig runner and result checker.

    This class provides methods to run text-based interface of Kconfig
    (scripts/kconfig/conf) and retrieve the resulted configuration,
    stdout, and stderr.  It also provides methods to compare those
    results with expectations.
    """

    def __init__(self, request):
        """Create a new Conf instance.

        request: object to introspect the requesting test module
        """
        # the directory of the test being run
        self._test_dir = os.path.dirname(str(request.fspath))

    # runners
    def _run_conf(self, mode, dot_config=None, out_file='.config',
                  interactive=False, in_keys=None, extra_env={}):
        """Run text-based Kconfig executable and save the result.

        mode: input mode option (--oldaskconfig, --defconfig=<file> etc.)
        dot_config: .config file to use for configuration base
        out_file: file name to contain the output config data
        interactive: flag to specify the interactive mode
        in_keys: key inputs for interactive modes
        extra_env: additional environments
        returncode: exit status of the Kconfig executable
        """
        command = [CONF_PATH, mode, 'Kconfig']

        # Override 'srctree' environment to make the test as the top directory
        extra_env['srctree'] = self._test_dir

        # Clear KCONFIG_DEFCONFIG_LIST to keep unit tests from being affected
        # by the user's environment.
        extra_env['KCONFIG_DEFCONFIG_LIST'] = ''

        # Run Kconfig in a temporary directory.
        # This directory is automatically removed when done.
        with tempfile.TemporaryDirectory() as temp_dir:

            # if .config is given, copy it to the working directory
            if dot_config:
                shutil.copyfile(os.path.join(self._test_dir, dot_config),
                                os.path.join(temp_dir, '.config'))

            ps = subprocess.Popen(command,
                                  stdin=subprocess.PIPE,
                                  stdout=subprocess.PIPE,
                                  stderr=subprocess.PIPE,
                                  cwd=temp_dir,
                                  env=dict(os.environ, **extra_env))

            # If input key sequence is given, feed it to stdin.
            if in_keys:
                ps.stdin.write(in_keys.encode('utf-8'))

            while ps.poll() is None:
                # For interactive modes such as oldaskconfig, oldconfig,
                # send 'Enter' key until the program finishes.
                if interactive:
                    ps.stdin.write(b'\n')

            self.retcode = ps.returncode
            self.stdout = ps.stdout.read().decode()
            self.stderr = ps.stderr.read().decode()

            # Retrieve the resulted config data only when .config is supposed
            # to exist.  If the command fails, the .config does not exist.
            # 'listnewconfig' does not produce .config in the first place.
            if self.retcode == 0 and out_file:
                with open(os.path.join(temp_dir, out_file)) as f:
                    self.config = f.read()
            else:
                self.config = None

        # Logging:
        # Pytest captures the following information by default.  In failure
        # of tests, the captured log will be displayed.  This will be useful to
        # figure out what has happened.

        print("[command]\n{}\n".format(' '.join(command)))

        print("[retcode]\n{}\n".format(self.retcode))

        print("[stdout]")
        print(self.stdout)

        print("[stderr]")
        print(self.stderr)

        if self.config is not None:
            print("[output for '{}']".format(out_file))
            print(self.config)

        return self.retcode

    def oldaskconfig(self, dot_config=None, in_keys=None):
        """Run oldaskconfig.

        dot_config: .config file to use for configuration base (optional)
        in_key: key inputs (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._run_conf('--oldaskconfig', dot_config=dot_config,
                              interactive=True, in_keys=in_keys)

    def oldconfig(self, dot_config=None, in_keys=None):
        """Run oldconfig.

        dot_config: .config file to use for configuration base (optional)
        in_key: key inputs (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._run_conf('--oldconfig', dot_config=dot_config,
                              interactive=True, in_keys=in_keys)

    def olddefconfig(self, dot_config=None):
        """Run olddefconfig.

        dot_config: .config file to use for configuration base (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._run_conf('--olddefconfig', dot_config=dot_config)

    def defconfig(self, defconfig):
        """Run defconfig.

        defconfig: defconfig file for input
        returncode: exit status of the Kconfig executable
        """
        defconfig_path = os.path.join(self._test_dir, defconfig)
        return self._run_conf('--defconfig={}'.format(defconfig_path))

    def _allconfig(self, mode, all_config):
        if all_config:
            all_config_path = os.path.join(self._test_dir, all_config)
            extra_env = {'KCONFIG_ALLCONFIG': all_config_path}
        else:
            extra_env = {}

        return self._run_conf('--{}config'.format(mode), extra_env=extra_env)

    def allyesconfig(self, all_config=None):
        """Run allyesconfig.

        all_config: fragment config file for KCONFIG_ALLCONFIG (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._allconfig('allyes', all_config)

    def allmodconfig(self, all_config=None):
        """Run allmodconfig.

        all_config: fragment config file for KCONFIG_ALLCONFIG (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._allconfig('allmod', all_config)

    def allnoconfig(self, all_config=None):
        """Run allnoconfig.

        all_config: fragment config file for KCONFIG_ALLCONFIG (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._allconfig('allno', all_config)

    def alldefconfig(self, all_config=None):
        """Run alldefconfig.

        all_config: fragment config file for KCONFIG_ALLCONFIG (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._allconfig('alldef', all_config)

    def randconfig(self, all_config=None):
        """Run randconfig.

        all_config: fragment config file for KCONFIG_ALLCONFIG (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._allconfig('rand', all_config)

    def savedefconfig(self, dot_config):
        """Run savedefconfig.

        dot_config: .config file for input
        returncode: exit status of the Kconfig executable
        """
        return self._run_conf('--savedefconfig', out_file='defconfig')

    def listnewconfig(self, dot_config=None):
        """Run listnewconfig.

        dot_config: .config file to use for configuration base (optional)
        returncode: exit status of the Kconfig executable
        """
        return self._run_conf('--listnewconfig', dot_config=dot_config,
                              out_file=None)

    # checkers
    def _read_and_compare(self, compare, expected):
        """Compare the result with expectation.

        compare: function to compare the result with expectation
        expected: file that contains the expected data
        """
        with open(os.path.join(self._test_dir, expected)) as f:
            expected_data = f.read()
        return compare(self, expected_data)

    def _contains(self, attr, expected):
        return self._read_and_compare(
                                    lambda s, e: getattr(s, attr).find(e) >= 0,
                                    expected)

    def _matches(self, attr, expected):
        return self._read_and_compare(lambda s, e: getattr(s, attr) == e,
                                      expected)

    def config_contains(self, expected):
        """Check if resulted configuration contains expected data.

        expected: file that contains the expected data
        returncode: True if result contains the expected data, False otherwise
        """
        return self._contains('config', expected)

    def config_matches(self, expected):
        """Check if resulted configuration exactly matches expected data.

        expected: file that contains the expected data
        returncode: True if result matches the expected data, False otherwise
        """
        return self._matches('config', expected)

    def stdout_contains(self, expected):
        """Check if resulted stdout contains expected data.

        expected: file that contains the expected data
        returncode: True if result contains the expected data, False otherwise
        """
        return self._contains('stdout', expected)

    def stdout_matches(self, expected):
        """Check if resulted stdout exactly matches expected data.

        expected: file that contains the expected data
        returncode: True if result matches the expected data, False otherwise
        """
        return self._matches('stdout', expected)

    def stderr_contains(self, expected):
        """Check if resulted stderr contains expected data.

        expected: file that contains the expected data
        returncode: True if result contains the expected data, False otherwise
        """
        return self._contains('stderr', expected)

    def stderr_matches(self, expected):
        """Check if resulted stderr exactly matches expected data.

        expected: file that contains the expected data
        returncode: True if result matches the expected data, False otherwise
        """
        return self._matches('stderr', expected)


@pytest.fixture(scope="module")
def conf(request):
    """Create a Conf instance and provide it to test functions."""
    return Conf(request)