koala73/worldmonitor · error · Error

No test files match ${pattern}

Error message

No test files match ${pattern}

What it means

For each positional argument, run-data-tests.mjs first checks if the pattern is an existing file, otherwise expands it with globSync. If a pattern expands to zero matches it throws `No test files match ${pattern}` so typos or wrong paths fail fast instead of silently running zero tests.

Solutions

1. Verify the glob from the same working directory: `ls tests/data/*.test.mjs` — fix typos or path prefixes
2. Check that the command runs from the repository root (globs are relative to cwd)
3. If a file was intentionally passed, confirm it exists (`test -f <path>`); if a glob is correct, confirm the test files actually exist in the checkout

Example fix

// before
node scripts/run-data-tests.mjs 'tests/unit/**/*.test.js'
// after (match the actual layout)
node scripts/run-data-tests.mjs 'tests/unit/**/*.test.mjs'

import { existsSync, statSync, globSync } from 'node:fs';
for (const pattern of patterns) {
  const ok = (existsSync(pattern) && statSync(pattern).isFile()) || globSync(pattern).length > 0;
  if (!ok) throw new Error(`No test files match ${pattern} (cwd=${process.cwd()})`);
}

const patternMatchesFiles = (pattern) =>
  (existsSync(pattern) && statSync(pattern).isFile()) || globSync(pattern).length > 0;

try {
  await run();
} catch (err) {
  const m = err.message.match(/^No test files match (.+)$/);
  if (m) {
    console.error(`Glob ${m[1]} matched nothing. cwd=${process.cwd()}. Check the path and that test files exist.`);
    process.exit(2);
  }
  throw err;
}

When it happens

Trigger: Calling the runner with a positional that is neither an existing file nor a matching glob, e.g. `node scripts/run-data-tests.mjs 'tests/data/*.spec.mjs'` when no .spec.mjs files exist, or a typo like 'tests/data/**/*test.mjs'.

Common situations: Working from the wrong working directory so relative globs match nothing; renaming/moving test directories so stale globs in CI configs break; quoting issues where the shell already expanded (or failed to expand) the glob; case-sensitive filesystem mismatches.

Understand the failure class

Background: "File not found" and ENOENT errors: why libraries can't find a file that should exist — this error's family across 50 libraries.

Related errors

• Supply test files or globs
• Shard count exceeds the test file count
• The selected shard contains no test files
• global fetch is unavailable — Node 18+ is required
• --args must be valid JSON: ${err.message}

AI-assisted analysis of koala73/worldmonitor@7d06c8633d (2026-09-15). Data as JSON: /api/errors/5af73e866b21bb70. Report an issue: GitHub.

Appendix: source

Thrown at scripts/run-data-tests.mjs:57

  });
  if (!/^[1-9]\d*$/.test(values.concurrency) || !Number.isSafeInteger(Number(values.concurrency))) {
    throw new Error('Concurrency must be a positive integer');
  }
  let index = 1;
  let total = 1;
  if (values.shard) {
    const match = /^([1-9]\d*)\/([1-9]\d*)$/.exec(values.shard);
    if (!match) throw new Error('Shard must be INDEX/TOTAL (for example 1/2)');
    [index, total] = match.slice(1).map(Number);
    if (!Number.isSafeInteger(index) || !Number.isSafeInteger(total) || index > total) {
      throw new Error('Shard index must be between 1 and TOTAL');
    }
  }
  if (!positionals.length) throw new Error('Supply test files or globs');
  const files = [...new Set(positionals.flatMap((pattern) => {
    const matches = (existsSync(pattern) && statSync(pattern).isFile() ? [pattern] : globSync(pattern))
      .map((file) => file.split(sep).join('/'));
    if (!matches.length) throw new Error(`No test files match ${pattern}`);
    return matches;
  }))];
  const durations = JSON.parse(readFileSync(timingPath, 'utf8'));
  if (total > files.length) throw new Error('Shard count exceeds the test file count');
  const selected = partitionTests(files, durations, total)[index - 1];
  if (!selected.length) throw new Error('The selected shard contains no test files');
  if (values.list) {
    console.log(JSON.stringify(selected));
    return 0;
  }
  console.log(`Data tests: ${selected.length}/${files.length} files, shard ${index}/${total}, concurrency ${values.concurrency}`);
  const env = { ...process.env };
  // This is a new test run, even when a contract test invokes the CLI.
  delete env.NODE_TEST_CONTEXT;
  const timingFd = values.timings ? openSync(values.timings, 'w') : undefined;
  let success = false;
  try {
    const events = run({

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