neser 1.2.0

NESER - Nintendo Emulation Systems Engine (Rust). Desktop and WebAssembly frontends.
Documentation 
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

"""Unit tests for release package verification."""

import tarfile
import tempfile
import unittest
import zipfile
from pathlib import Path
from unittest.mock import patch

from scripts.verify_release_package import (
    ReleasePackageVerificationError,
    VerificationConfig,
    _run_smoke_command,
    main,
    verify_release_package,
)


def write_text(path: Path, text: str) -> None:
    """Write UTF-8 text, creating parent directories first."""

    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(text, encoding="utf-8")


def create_package_tree(root: Path, *, binary_name: str = "neser") -> Path:
    """Create a minimal extracted release package tree."""

    package_root = root / "neser"
    write_text(package_root / "assets/fonts/NunitoSans-Regular.ttf", "font\n")
    write_text(package_root / "gamecontrollerdb.txt", "controller mappings\n")
    write_text(package_root / "neser.conf.example", "# config\n")
    write_text(package_root / "README.md", "# neser\n")
    write_text(package_root / "README-NES.md", "# nes\n")
    write_text(package_root / "README-GB.md", "# gb\n")
    write_text(package_root / "README-GBA.md", "# gba\n")
    write_text(package_root / "LICENSE", "license\n")
    write_text(package_root / "shaders/stock.slangp", "shader0 = stock.slang\n")
    write_text(package_root / "shaders/stock.slang", "void main() {}\n")
    binary_path = package_root / binary_name
    write_text(binary_path, "#!/bin/sh\nprintf 'neser 1.0.0\\n'\n")
    binary_path.chmod(0o755)
    return package_root


def create_tar_gz(package_root: Path, archive_path: Path) -> None:
    """Create a tar.gz archive from an extracted package root."""

    with tarfile.open(archive_path, "w:gz") as archive:
        archive.add(package_root, arcname="neser")


def create_zip(package_root: Path, archive_path: Path) -> None:
    """Create a zip archive from an extracted package root."""

    with zipfile.ZipFile(archive_path, "w") as archive:
        for path in sorted(package_root.rglob("*")):
            if path.is_file():
                archive.write(path, Path("neser") / path.relative_to(package_root))


class VerifyReleasePackageTests(unittest.TestCase):
    """Behavior tests for release archive verification."""

    def test_verify_tar_gz_package_accepts_required_layout_and_smoke_command(
        self,
    ) -> None:
        """A complete Unix package passes manifest, permission, and smoke checks."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            temp_dir = Path(temp_dir_str)
            package_root = create_package_tree(temp_dir / "src")
            archive_path = temp_dir / "neser-linux-x86_64.tar.gz"
            create_tar_gz(package_root, archive_path)

            verify_release_package(
                VerificationConfig(
                    archive_path=archive_path,
                    binary_name="neser",
                    smoke_command=["./neser", "--version"],
                    require_unix_executable=True,
                )
            )

    def test_verify_zip_package_accepts_required_windows_layout(self) -> None:
        """A complete Windows zip package passes manifest checks."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            temp_dir = Path(temp_dir_str)
            package_root = create_package_tree(
                temp_dir / "src", binary_name="neser.exe"
            )
            archive_path = temp_dir / "neser-windows-x86_64.zip"
            create_zip(package_root, archive_path)

            verify_release_package(
                VerificationConfig(
                    archive_path=archive_path,
                    binary_name="neser.exe",
                )
            )

    def test_verify_package_reports_missing_required_resource(self) -> None:
        """Missing runtime resources fail with the missing archive path."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            temp_dir = Path(temp_dir_str)
            package_root = create_package_tree(temp_dir / "src")
            (package_root / "gamecontrollerdb.txt").unlink()
            archive_path = temp_dir / "neser-linux-x86_64.tar.gz"
            create_tar_gz(package_root, archive_path)

            with self.assertRaisesRegex(
                ReleasePackageVerificationError, "neser/gamecontrollerdb.txt"
            ):
                verify_release_package(
                    VerificationConfig(
                        archive_path=archive_path,
                        binary_name="neser",
                        require_unix_executable=True,
                    )
                )

    def test_verify_package_reports_missing_system_readme(self) -> None:
        """Release archives must keep system-specific README links valid."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            temp_dir = Path(temp_dir_str)
            package_root = create_package_tree(temp_dir / "src")
            (package_root / "README-NES.md").unlink()
            archive_path = temp_dir / "neser-linux-x86_64.tar.gz"
            create_tar_gz(package_root, archive_path)

            with self.assertRaisesRegex(
                ReleasePackageVerificationError, "neser/README-NES.md"
            ):
                verify_release_package(
                    VerificationConfig(
                        archive_path=archive_path,
                        binary_name="neser",
                    )
                )

    def test_verify_package_requires_default_shader_source(self) -> None:
        """The verifier requires the shader source referenced by stock.slangp."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            temp_dir = Path(temp_dir_str)
            package_root = create_package_tree(temp_dir / "src")
            (package_root / "shaders/stock.slang").unlink()
            archive_path = temp_dir / "neser-linux-x86_64.tar.gz"
            create_tar_gz(package_root, archive_path)

            with self.assertRaisesRegex(
                ReleasePackageVerificationError, "neser/shaders/stock.slang"
            ):
                verify_release_package(
                    VerificationConfig(
                        archive_path=archive_path,
                        binary_name="neser",
                    )
                )

    def test_verify_tar_gz_package_rejects_link_members(self) -> None:
        """Tar packages with symlink members are rejected before extraction."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            temp_dir = Path(temp_dir_str)
            package_root = create_package_tree(temp_dir / "src")
            archive_path = temp_dir / "neser-linux-x86_64.tar.gz"
            with tarfile.open(archive_path, "w:gz") as archive:
                archive.add(package_root, arcname="neser")
                link_info = tarfile.TarInfo("neser/shaders/escape")
                link_info.type = tarfile.SYMTYPE
                link_info.linkname = "../../outside"
                archive.addfile(link_info)

            with self.assertRaisesRegex(
                ReleasePackageVerificationError, "unsupported tar link"
            ):
                verify_release_package(
                    VerificationConfig(
                        archive_path=archive_path,
                        binary_name="neser",
                    )
                )

    def test_verify_package_reports_unsupported_single_suffix_archive(self) -> None:
        """Unsupported archive suffixes fail with a clean verifier error."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            archive_path = Path(temp_dir_str) / "neser-linux-x86_64.tgz"
            archive_path.write_bytes(b"not an archive")

            with self.assertRaisesRegex(
                ReleasePackageVerificationError, "unsupported archive format"
            ):
                verify_release_package(
                    VerificationConfig(
                        archive_path=archive_path,
                        binary_name="neser",
                    )
                )

    def test_main_verifies_archive_from_cli_arguments(self) -> None:
        """CLI arguments verify an archive and run the smoke command."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            temp_dir = Path(temp_dir_str)
            package_root = create_package_tree(temp_dir / "src")
            archive_path = temp_dir / "neser-linux-x86_64.tar.gz"
            create_tar_gz(package_root, archive_path)

            exit_code = main(
                [
                    str(archive_path),
                    "--binary-name",
                    "neser",
                    "--require-unix-executable",
                    "--smoke-command",
                    "./neser",
                    "--version",
                ]
            )

            self.assertEqual(exit_code, 0)

    def test_smoke_command_resolves_cwd_relative_executable_before_running(
        self,
    ) -> None:
        """Given a cwd-relative executable, the verifier runs its extracted path."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            package_root = Path(temp_dir_str) / "neser"
            package_root.mkdir()
            executable_path = package_root / "neser.exe"

            with patch("scripts.verify_release_package.subprocess.run") as run:
                run.return_value.returncode = 0

                _run_smoke_command(["./neser.exe", "--version"], package_root)

            run.assert_called_once()
            command = run.call_args.args[0]
            self.assertEqual(command[0], str(executable_path))
            self.assertEqual(command[1:], ["--version"])

    def test_smoke_command_resolves_windows_style_subdirectory_executable(
        self,
    ) -> None:
        """Given a Windows-style cwd-relative executable, separators are normalized."""

        with tempfile.TemporaryDirectory() as temp_dir_str:
            package_root = Path(temp_dir_str) / "neser"
            executable_path = package_root / "bin" / "neser.exe"

            with patch("scripts.verify_release_package.subprocess.run") as run:
                run.return_value.returncode = 0

                _run_smoke_command([".\\bin\\neser.exe", "--version"], package_root)

            run.assert_called_once()
            command = run.call_args.args[0]
            self.assertEqual(command[0], str(executable_path))
            self.assertEqual(command[1:], ["--version"])


if __name__ == "__main__":
    unittest.main()