Testing Infrastructure and Tool Development Questions

#!/usr/bin/env python3
import asyncio
import sys
from pathlib import Path

LOG_DIR = Path("logs")
LOG_DIR.mkdir(exist_ok=True)

async def run_cmd(idx, cmd, timeout, sem):
    log_path = LOG_DIR / f"job_{idx}.log"
    async with sem:
        proc = await asyncio.create_subprocess_shell(
            cmd,
            stdout=asyncio.subprocess.PIPE,
            stderr=asyncio.subprocess.STDOUT
        )
        try:
            out, _ = await asyncio.wait_for(proc.communicate(), timeout)
            code = proc.returncode
        except asyncio.TimeoutError:
            proc.kill()
            await proc.wait()
            out = b"--- TIMED OUT ---\n"
            code = 124
        log_path.write_bytes(out or b"")
        return code

async def main(concurrency, timeout):
    cmds = [line.rstrip("\n") for line in sys.stdin if line.strip()]
    sem = asyncio.Semaphore(concurrency)
    tasks = [run_cmd(i+1, c, timeout, sem) for i,c in enumerate(cmds)]
    results = await asyncio.gather(*tasks)
    # exit non-zero if any failed (non-zero return code)
    failed = any(code != 0 for code in results)
    return 1 if failed else 0

if __name__ == "__main__":
    if len(sys.argv) < 3:
        print("Usage: script.py <concurrency> <timeout_seconds>", file=sys.stderr)
        sys.exit(2)
    concurrency = int(sys.argv[1])
    timeout = float(sys.argv[2])
    exit_code = asyncio.run(main(concurrency, timeout))
    sys.exit(exit_code)

# Pseudocode test harness (Python-like)
VERSIONS = discover_versions()            # e.g., ["v1.0","v1.1","v2.0"]
TEST_SUITE = load_tests()                 # list of test functions / specs
TIMEOUT = 30                              # per-test timeout seconds
REPORT = []

def launch_service(version, role):
    # role: "server" or "client"
    # start container or process, return connection info and teardown handle
    return start_container(image_for(version, role))

def run_pair(client_ver, server_ver):
    server = launch_service(server_ver, "server")
    client = launch_service(client_ver, "client")
    try:
        for test in TEST_SUITE:
            result = run_test_with_timeout(test, client.conn, server.endpoint, TIMEOUT)
            if not result.passed:
                REPORT.append({
                    "client": client_ver,
                    "server": server_ver,
                    "test": test.name,
                    "error": result.error,
                    "logs": collect_logs(client, server)
                })
                break  # stop early for this pair or continue depending on policy
    finally:
        teardown(client); teardown(server)

# iterate combinations of interest
for old in VERSIONS:
    for new in VERSIONS:
        if old == new: continue
        # check both directions: old client + new server, new client + old server
        run_pair(old, new)
        run_pair(new, old)

generate_report(REPORT)