7 files changed, 545 insertions, 0 deletions
diff --git a/test/src/lib/__init__.py b/test/src/lib/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/src/lib/__init__.py
diff --git a/test/src/lib/db.py b/test/src/lib/db.py
new file mode 100644
index 0000000..de6960a
--- /dev/null
+++ b/test/src/lib/db.py
@@ -0,0 +1,30 @@
+# Copyright (c) 2023 Egor Tensin <egor@tensin.name>
+# This file is part of the "cimple" project.
+# For details, see https://github.com/egor-tensin/cimple.
+# Distributed under the MIT License.
+
+from contextlib import closing, contextmanager
+import logging
+import sqlite3
+
+
+class Database:
+    def __init__(self, path):
+        logging.info('Opening SQLite database: %s', path)
+        self.conn = sqlite3.connect(f'file:{path}?mode=ro', uri=True)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(*args):
+        self.conn.close()
+
+    @contextmanager
+    def get_cursor(self):
+        with closing(self.conn.cursor()) as cur:
+            yield cur
+
+    def get_all_runs(self):
+        with self.get_cursor() as cur:
+            cur.execute('SELECT * FROM cimple_runs_view')
+            return cur.fetchall()
diff --git a/test/src/lib/logging.py b/test/src/lib/logging.py
new file mode 100644
index 0000000..663eb3a
--- /dev/null
+++ b/test/src/lib/logging.py
@@ -0,0 +1,45 @@
+# Copyright (c) 2023 Egor Tensin <egor@tensin.name>
+# This file is part of the "cimple" project.
+# For details, see https://github.com/egor-tensin/cimple.
+# Distributed under the MIT License.
+
+from contextlib import contextmanager
+import logging
+import logging.config
+import logging.handlers
+import multiprocessing as mp
+
+
+@contextmanager
+def child_logging_thread():
+    # Delegating logging to the parent logger.
+    ctx = mp.get_context('spawn')
+    queue = ctx.Queue()
+    listener = logging.handlers.QueueListener(queue, logging.getLogger())
+    listener.start()
+    try:
+        yield queue
+    finally:
+        listener.stop()
+
+
+@contextmanager
+def configure_logging_in_child(queue):
+    config = {
+        'version': 1,
+        'handlers': {
+            'sink': {
+                'class': 'logging.handlers.QueueHandler',
+                'queue': queue,
+            },
+        },
+        'root': {
+            'handlers': ['sink'],
+            'level': 'DEBUG',
+        },
+    }
+    logging.config.dictConfig(config)
+    try:
+        yield
+    except Exception as e:
+        logging.exception(e)
diff --git a/test/src/lib/net.py b/test/src/lib/net.py
new file mode 100644
index 0000000..06bfda0
--- /dev/null
+++ b/test/src/lib/net.py
@@ -0,0 +1,15 @@
+# Copyright (c) 2023 Egor Tensin <egor@tensin.name>
+# This file is part of the "cimple" project.
+# For details, see https://github.com/egor-tensin/cimple.
+# Distributed under the MIT License.
+
+from contextlib import closing
+import socket
+
+
+def random_unused_port():
+    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
+        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        sock.bind(('0.0.0.0', 0))
+        port = sock.getsockname()[1]
+        return port
diff --git a/test/src/lib/process.py b/test/src/lib/process.py
new file mode 100644
index 0000000..3b1b6b9
--- /dev/null
+++ b/test/src/lib/process.py
@@ -0,0 +1,201 @@
+# Copyright (c) 2023 Egor Tensin <egor@tensin.name>
+# This file is part of the "cimple" project.
+# For details, see https://github.com/egor-tensin/cimple.
+# Distributed under the MIT License.
+
+from contextlib import contextmanager
+import logging
+import os
+import shutil
+import subprocess
+from threading import Event, Lock, Thread
+
+
+class LoggingEvent(Event):
+    def __init__(self, timeout=10):
+        self.timeout = timeout
+        super().__init__()
+
+    def log_line_matches(self, line):
+        return False
+
+    def wait(self):
+        if not super().wait(self.timeout):
+            raise RuntimeError('timed out while waiting for an event')
+
+
+class LoggingThread(Thread):
+    def __init__(self, process, events=None):
+        self.process = process
+        self.events_lock = Lock()
+        if events is None:
+            events = []
+        self.events = events
+
+        super().__init__(target=lambda: self.process_output_lines())
+        self.start()
+
+    def add_event(self, event):
+        with self.events_lock:
+            self.events.append(event)
+
+    def process_output_lines(self):
+        for line in self.process.stdout:
+            line = line.removesuffix('\n')
+            logging.info('%s: %s', self.process.log_id, line)
+            with self.events_lock:
+                for event in self.events:
+                    if event.is_set():
+                        continue
+                    if not event.log_line_matches(line):
+                        continue
+                    event.set()
+                self.events = [event for event in self.events if not event.is_set()]
+
+
+class CmdLine:
+    @staticmethod
+    def which(binary):
+        if os.path.split(binary)[0]:
+            # shutil.which('bin/bash') doesn't work.
+            return os.path.abspath(binary)
+        path = shutil.which(binary)
+        if path is None:
+            raise RuntimeError("couldn't find a binary: " + binary)
+        return path
+
+    @staticmethod
+    def unbuffered():
+        return CmdLine('stdbuf', '-o0')
+
+    def __init__(self, binary, *args, name=None):
+        binary = self.which(binary)
+        argv = [binary] + list(args)
+
+        self.binary = binary
+        self.argv = argv
+
+        if name is None:
+            name = os.path.basename(binary)
+        self.process_name = name
+
+    def log_line_means_process_ready(self, line):
+        return True
+
+    @classmethod
+    def wrap(cls, outer, inner):
+        return cls(outer.argv[0], *outer.argv[1:], *inner.argv, name=inner.process_name)
+
+    def run(self, *argv):
+        return Process.run(*self.argv, *argv)
+
+    def try_run(self, *argv):
+        return Process.try_run(*self.argv, *argv)
+
+    @contextmanager
+    def run_async(self, *argv):
+        with Process(self, *argv) as process:
+            yield process
+
+
+class LoggingEventProcessReady(LoggingEvent):
+    def __init__(self, process):
+        self.process = process
+        super().__init__()
+
+    def set(self):
+        logging.info('Process %s is ready', self.process.log_id)
+        super().set()
+
+    def log_line_matches(self, line):
+        return self.process.cmd_line.log_line_means_process_ready(line)
+
+
+class Process(subprocess.Popen):
+    _COMMON_ARGS = {
+        'text': True,
+        'stdin': subprocess.DEVNULL,
+        'stdout': subprocess.PIPE,
+        'stderr': subprocess.STDOUT,
+    }
+
+    @staticmethod
+    def _log_process_start(argv):
+        logging.info('Executing command: %s', argv)
+
+    @staticmethod
+    def _log_process_end(argv, ec, output):
+        log = logging.info
+        if ec:
+            log = logging.error
+        if ec:
+            log('Command %s exited with code %s', argv, ec)
+        else:
+            log('Command %s completed successfully', argv)
+        if output:
+            log('Output:\n%s', output)
+
+    @staticmethod
+    def run(*args, **kwargs):
+        argv = list(args)
+        Process._log_process_start(argv)
+        try:
+            result = subprocess.run(argv, check=True, **Process._COMMON_ARGS, **kwargs)
+            ec, output = result.returncode, result.stdout
+            Process._log_process_end(argv, ec, output)
+            return output
+        except subprocess.CalledProcessError as e:
+            ec, output = e.returncode, e.stdout
+            Process._log_process_end(argv, ec, output)
+            raise
+
+    @staticmethod
+    def try_run(*args, **kwargs):
+        try:
+            return 0, Process.run(*args, **kwargs)
+        except subprocess.CalledProcessError as e:
+            return e.returncode, e.stdout
+
+    def __init__(self, cmd_line, *args):
+        self.cmd_line = cmd_line
+
+        argv = cmd_line.argv + list(args)
+        self._log_process_start(argv)
+
+        super().__init__(argv, **Process._COMMON_ARGS)
+        logging.info('Process %s has started', self.log_id)
+
+        ready_event = LoggingEventProcessReady(self)
+        self.logger = LoggingThread(self, [ready_event])
+        ready_event.wait()
+
+    @property
+    def log_id(self):
+        return f'{self.pid}/{self.cmd_line.process_name}'
+
+    def __exit__(self, *args):
+        try:
+            self.shut_down()
+            self.logger.join()
+        except Exception as e:
+            logging.exception(e)
+        # Postpone closing the pipes until after the logging thread is finished
+        # so that it doesn't attempt to read from closed descriptors.
+        super().__exit__(*args)
+
+    SHUT_DOWN_TIMEOUT_SEC = 10
+
+    def shut_down(self):
+        ec = self.poll()
+        if ec is not None:
+            return
+        logging.info('Terminating process %s', self.log_id)
+        self.terminate()
+        try:
+            self.wait(timeout=Process.SHUT_DOWN_TIMEOUT_SEC)
+            return
+        except subprocess.TimeoutExpired:
+            pass
+        logging.info('Process %s failed to terminate in time, killing it', self.log_id)
+        self.kill()
+        self.wait(timeout=Process.SHUT_DOWN_TIMEOUT_SEC)
diff --git a/test/src/lib/test_repo.py b/test/src/lib/test_repo.py
new file mode 100644
index 0000000..1d07a4e
--- /dev/null
+++ b/test/src/lib/test_repo.py
@@ -0,0 +1,231 @@
+# Copyright (c) 2023 Egor Tensin <egor@tensin.name>
+# This file is part of the "cimple" project.
+# For details, see https://github.com/egor-tensin/cimple.
+# Distributed under the MIT License.
+
+import abc
+import base64
+import logging
+import os
+import random
+import shlex
+import shutil
+
+from .process import Process
+
+
+class Repo:
+    BRANCH = 'main'
+
+    def __init__(self, path):
+        self.path = os.path.abspath(path)
+        os.makedirs(path, exist_ok=True)
+        self.run('git', 'init', '-q', f'--initial-branch={Repo.BRANCH}')
+        self.run('git', 'config', 'user.name', 'Test User')
+        self.run('git', 'config', 'user.email', 'test@example.com')
+
+    def run(self, *args, **kwargs):
+        Process.run(*args, cwd=self.path, **kwargs)
+
+
+CI_SCRIPT = r'''#!/usr/bin/env bash
+set -o errexit -o nounset -o pipefail
+readonly runs_dir={runs_dir}
+readonly run_output_template=run_XXXXXX
+run_output_path="$( mktemp --tmpdir="$runs_dir" "$run_output_template" )"
+touch -- "$run_output_path"
+'''
+
+
+class TestRepo(Repo):
+    # Prevent Pytest from discovering test cases in this class:
+    __test__ = False
+
+    def __init__(self, path, ci_script='ci'):
+        super().__init__(path)
+
+        self.runs_dir = os.path.join(self.path, 'runs')
+        os.makedirs(self.runs_dir, exist_ok=True)
+
+        self.ci_script_path = os.path.join(self.path, ci_script)
+
+        self.write_ci_script()
+        self.run('git', 'add', '--', ci_script)
+        self.run('git', 'commit', '-q', '-m', 'add CI script')
+
+    @staticmethod
+    @abc.abstractmethod
+    def codename():
+        pass
+
+    @abc.abstractmethod
+    def run_exit_code_matches(self, ec):
+        pass
+
+    @abc.abstractmethod
+    def run_output_matches(self, output):
+        pass
+
+    def write_ci_script(self):
+        with open(self.ci_script_path, mode='x') as f:
+            f.write(self.format_ci_script())
+        os.chmod(self.ci_script_path, 0o755)
+
+    def format_ci_script(self):
+        runs_dir = shlex.quote(self.runs_dir)
+        return CI_SCRIPT.format(runs_dir=runs_dir)
+
+    def _count_run_files(self):
+        return len([name for name in os.listdir(self.runs_dir) if os.path.isfile(os.path.join(self.runs_dir, name))])
+
+    def run_files_are_present(self, expected):
+        assert expected == self._count_run_files()
+
+
+class TestRepoOutput(TestRepo, abc.ABC):
+    __test__ = False
+
+    OUTPUT_SCRIPT_NAME = 'generate-output'
+
+    def __init__(self, path):
+        self.output_script_path = os.path.join(path, TestRepoOutput.OUTPUT_SCRIPT_NAME)
+        super().__init__(path)
+
+        self.write_output_script()
+        self.run('git', 'add', '--', TestRepoOutput.OUTPUT_SCRIPT_NAME)
+        self.run('git', 'commit', '-q', '-m', 'add output script')
+
+    def format_ci_script(self):
+        script = super().format_ci_script()
+        added = r'{output_script} | tee -a "$run_output_path"'.format(
+            output_script=shlex.quote(self.output_script_path))
+        return f'{script}\n{added}\n'
+
+    def write_output_script(self):
+        with open(self.output_script_path, mode='x') as f:
+            f.write(self.format_output_script())
+        os.chmod(self.output_script_path, 0o755)
+
+    @abc.abstractmethod
+    def format_output_script(self):
+        pass
+
+    def run_exit_code_matches(self, ec):
+        return ec == 0
+
+
+OUTPUT_SCRIPT_SIMPLE = r'''#!/bin/sh -e
+timestamp="$( date --iso-8601=ns )"
+echo "A CI run happened at $timestamp"
+'''
+
+
+class TestRepoOutputSimple(TestRepoOutput):
+    __test__ = False
+
+    @staticmethod
+    def codename():
+        return 'output_simple'
+
+    def format_output_script(self):
+        return OUTPUT_SCRIPT_SIMPLE
+
+    def run_output_matches(self, output):
+        return output.decode().startswith('A CI run happened at ')
+
+
+OUTPUT_SCRIPT_EMPTY = r'''#!/bin/sh
+'''
+
+
+class TestRepoOutputEmpty(TestRepoOutput):
+    __test__ = False
+
+    @staticmethod
+    def codename():
+        return 'output_empty'
+
+    def format_output_script(self):
+        return OUTPUT_SCRIPT_EMPTY
+
+    def run_output_matches(self, output):
+        return len(output) == 0
+
+
+OUTPUT_SCRIPT_LONG = r'''#!/bin/sh -e
+dd if=/dev/urandom count={output_len_kb} bs=1024 | base64
+'''
+
+
+class TestRepoOutputLong(TestRepoOutput):
+    __test__ = False
+
+    OUTPUT_LEN_KB = 300
+
+    @staticmethod
+    def codename():
+        return 'output_long'
+
+    def format_output_script(self):
+        output_len = TestRepoOutputLong.OUTPUT_LEN_KB
+        output_len = shlex.quote(str(output_len))
+        return OUTPUT_SCRIPT_LONG.format(output_len_kb=output_len)
+
+    def run_output_matches(self, output):
+        return len(output) > TestRepoOutputLong.OUTPUT_LEN_KB * 1024
+
+
+OUTPUT_SCRIPT_NULL = r'''#!/usr/bin/env python3
+output = {output}
+import sys
+sys.stdout.buffer.write(output)
+sys.exit(-2)
+'''
+
+
+class TestRepoOutputNull(TestRepoOutput):
+    __test__ = False
+
+    OUTPUT = b'123\x00456\x00789'
+
+    def __init__(self, *args, **kwargs):
+        assert len(TestRepoOutputNull.OUTPUT) == 11
+        self.output = TestRepoOutputNull.OUTPUT
+        super().__init__(*args, **kwargs)
+
+    @staticmethod
+    def codename():
+        return 'output_null'
+
+    def format_output_script(self):
+        return OUTPUT_SCRIPT_NULL.format(output=repr(self.output))
+
+    def run_exit_code_matches(self, ec):
+        return ec == 254
+
+    def run_output_matches(self, output):
+        return output == self.output
+
+
+class TestRepoSegfault(TestRepo):
+    __test__ = False
+
+    def __init__(self, repo_path, prog_path):
+        self.prog_path = prog_path
+        super().__init__(repo_path)
+
+    @staticmethod
+    def codename():
+        return 'segfault'
+
+    def write_ci_script(self):
+        shutil.copy(self.prog_path, self.ci_script_path)
+
+    def run_exit_code_matches(self, ec):
+        return ec == -11
+
+    def run_output_matches(self, output):
+        return "Started the test program.\n" == output.decode()
+
+    def run_files_are_present(self, *args):
+        return True
diff --git a/test/src/lib/tests.py b/test/src/lib/tests.py
new file mode 100644
index 0000000..7ccedef
--- /dev/null
+++ b/test/src/lib/tests.py
@@ -0,0 +1,23 @@
+# Copyright (c) 2023 Egor Tensin <egor@tensin.name>
+# This file is part of the "cimple" project.
+# For details, see https://github.com/egor-tensin/cimple.
+# Distributed under the MIT License.
+
+import pytest
+
+
+# Reference: https://github.com/pytest-dev/pytest/issues/3628
+# Automatic generation of readable test IDs.
+def my_parametrize(names, values, ids=None, **kwargs):
+    _names = names.split(',') if isinstance(names, str) else names
+    if not ids:
+        if len(_names) == 1:
+            ids = [f'{names}={v}' for v in values]
+        else:
+            _values = [combination.values if hasattr(combination, 'values') else combination
+                       for combination in values]
+            ids = [
+                '-'.join(f'{k}={v}' for k, v in zip(_names, combination))
+                for combination in _values
+            ]
+    return pytest.mark.parametrize(names, values, ids=ids, **kwargs)