Files
msd-core/tests/changeset-cli.test.cjs
Tom Boucher dcb0d8a28d fix(#935): install changeset CLI so /gsd-update changelog preview works (#938)
- bin/install.js now copies scripts/changeset/ and scripts/lib/ into
  <configDir>/scripts/ so $GSD_DIR/scripts/changeset/cli.cjs resolves
  at runtime; aborts install with an explicit failure if the source
  directory is missing from the package.
- gsd-core/workflows/update.md: corrected path from
  gsd-core/scripts/changeset/cli.cjs to scripts/changeset/cli.cjs;
  added an explicit [ ! -f ] guard so a missing CLI surfaces a clear
  message rather than silently swallowing the error; stderr captured
  via 2>&1 sentinel so node errors are visible in the preview output.
- release.yml's changeset-CLI invocations (node scripts/changeset/cli.cjs)
  remain at the repo-root path and are unaffected by this change.

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-09 12:37:26 -04:00

1077 lines
47 KiB
JavaScript

'use strict';
process.env.GSD_TEST_MODE = '1';
const { test, describe, before, after, beforeEach } = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');
const cp = require('node:child_process');
const { cleanup } = require('./helpers.cjs');
const ROOT = path.join(__dirname, '..');
const SCRIPT = path.join(ROOT, 'scripts', 'changeset', 'cli.cjs');
const { parseChangelog } = require(path.join(ROOT, 'scripts', 'changeset', 'serialize.cjs'));
let tmp;
function writeFragment(name, type, pr, body) {
fs.mkdirSync(path.join(tmp, '.changeset'), { recursive: true });
fs.writeFileSync(
path.join(tmp, '.changeset', `${name}.md`),
`---\ntype: ${type}\npr: ${pr}\n---\n${body}\n`,
);
}
function runRender(args = []) {
const r = cp.spawnSync(
process.execPath,
[SCRIPT, 'render', '--repo', tmp, ...args, '--json'],
{ encoding: 'utf8' },
);
return {
status: r.status,
report: r.stdout && r.stdout.length ? JSON.parse(r.stdout) : null,
stderr: r.stderr || '',
};
}
function runRenderRaw(args = []) {
const r = cp.spawnSync(process.execPath, [SCRIPT, 'render', '--repo', tmp, ...args], { encoding: 'utf8' });
return { status: r.status, stdout: r.stdout || '', stderr: r.stderr || '' };
}
before(() => { tmp = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-changeset-')); });
after(() => { cleanup(tmp); });
// Fixtures for extract tests (#3496)
// Written as arrays to avoid template-literal indentation injecting
// leading spaces that would break the ^## regex anchor.
const EXTRACT_CHANGELOG = [
'# Changelog',
'',
'## [1.5.15] - 2026-01-20',
'',
'### Added',
'',
'- Feature X. (#200)',
'',
'## [1.5.14] - 2026-01-18',
'',
'### Fixed',
'',
'- Single-line fix. (#101)',
'- **Multi-line fix** — first line of a long',
' description that spans two lines. (#102)',
'',
'## [1.5.13] - 2026-01-15',
'',
'### Fixed',
'',
'- Old fix. (#100)',
'',
'## [1.5.10] - 2026-01-01',
'',
'### Fixed',
'',
'- Very old fix. (#50)',
].join('\n');
function runExtract(args = [], changelogText = null) {
const changelogFile = path.join(tmp, 'CHANGELOG-extract-test.md');
if (changelogText !== null) {
fs.writeFileSync(changelogFile, changelogText);
}
const r = cp.spawnSync(
process.execPath,
[SCRIPT, 'extract', '--changelog', changelogFile, ...args],
{ encoding: 'utf8' },
);
return {
status: r.status,
stdout: r.stdout || '',
stderr: r.stderr || '',
json: (() => {
try { return JSON.parse(r.stdout); } catch { return null; }
})(),
};
}
describe('changeset cli extract: version-range changelog extraction (#3496)', () => {
test('exits 2 with no output when no versions fall in range', (_t) => {
const r = runExtract(['--from', '1.5.15', '--to', '1.5.15', '--json'], EXTRACT_CHANGELOG);
assert.equal(r.status, 2, `expected exit 2 for empty range, stderr=${r.stderr}`);
// F11: assert JSON structure is present and releases is empty array
assert.ok(r.json, 'stdout must be valid JSON even on exit 2');
assert.strictEqual(r.json.releases.length, 0, 'releases must be empty array on exit 2');
});
test('extracts versions strictly after from and up to and including to', (_t) => {
const r = runExtract(['--from', '1.5.13', '--to', '1.5.15', '--json'], EXTRACT_CHANGELOG);
assert.equal(r.status, 0, `stderr=${r.stderr}`);
assert.ok(r.json, 'stdout must be valid JSON');
const versions = r.json.releases.map((rel) => rel.version);
assert.ok(versions.includes('1.5.15'), '1.5.15 must be in range (inclusive to)');
assert.ok(versions.includes('1.5.14'), '1.5.14 must be in range (between from and to)');
assert.ok(!versions.includes('1.5.13'), '1.5.13 must NOT be in range (exclusive from)');
assert.ok(!versions.includes('1.5.10'), '1.5.10 must NOT be in range (below from)');
});
test('accepts v-prefixed version arguments', (_t) => {
const r = runExtract(['--from', 'v1.5.13', '--to', 'v1.5.15', '--json'], EXTRACT_CHANGELOG);
assert.equal(r.status, 0, `stderr=${r.stderr}`);
assert.ok(r.json, 'stdout must be valid JSON');
const versions = r.json.releases.map((rel) => rel.version);
assert.ok(versions.includes('1.5.15'));
assert.ok(versions.includes('1.5.14'));
assert.ok(!versions.includes('1.5.13'));
});
test('captures multi-line bullets in extracted range', (_t) => {
const r = runExtract(['--from', '1.5.13', '--to', '1.5.14', '--json'], EXTRACT_CHANGELOG);
assert.equal(r.status, 0, `stderr=${r.stderr}`);
const release = r.json.releases.find((rel) => rel.version === '1.5.14');
assert.ok(release, '1.5.14 must be in result');
const prs = release.sections.flatMap((s) => s.bullets.map((b) => b.pr));
assert.ok(prs.includes(101), 'single-line bullet pr=101 must be captured');
assert.ok(prs.includes(102), 'multi-line bullet pr=102 must be captured');
});
test('emits markdown text (non-JSON) when --json is not passed', (_t) => {
// Without --json the output is human-readable markdown, not JSON.
// Assert on structural facts derivable from the text: exactly the two
// matched releases appear as ## headers, using parseChangelog so we
// assert on version strings via the production parser rather than
// raw substring matches.
const { parseChangelog: _pc } = require(path.join(ROOT, 'scripts', 'changeset', 'serialize.cjs'));
const r = runExtract(['--from', '1.5.13', '--to', '1.5.15'], EXTRACT_CHANGELOG);
assert.equal(r.status, 0, `stderr=${r.stderr}`);
assert.ok(r.stdout.trim().length > 0, 'stdout must be non-empty');
const parsed = _pc(r.stdout);
const versions = parsed.releases.map((rel) => rel.version);
assert.ok(versions.includes('1.5.15'), '1.5.15 in markdown output');
assert.ok(versions.includes('1.5.14'), '1.5.14 in markdown output');
assert.ok(!versions.includes('1.5.13'), '1.5.13 must not appear in output (excluded by --from)');
});
test('missing --from or --to emits usage and exits non-zero', (_t) => {
const r = runExtract(['--from', '1.0.0'], EXTRACT_CHANGELOG);
assert.notEqual(r.status, 0);
assert.ok(r.stderr.length > 0 || r.stdout.length > 0, 'must emit usage text');
});
test('rejects malformed --from semver (non-numeric component) with exit 1', (_t) => {
const r = runExtract(['--from', '1.41.x', '--to', '1.5.15', '--json'], EXTRACT_CHANGELOG);
assert.equal(r.status, 1, `expected exit 1 for malformed --from, stderr=${r.stderr}`);
assert.ok(r.json, 'stdout must be valid JSON on error');
assert.ok(typeof r.json.error === 'string', 'error field must be present');
assert.ok(r.json.error.includes('--from'), 'error must mention --from');
});
test('rejects malformed --to semver (alphabetic) with exit 1', (_t) => {
const r = runExtract(['--from', '1.5.13', '--to', 'foo', '--json'], EXTRACT_CHANGELOG);
assert.equal(r.status, 1, `expected exit 1 for malformed --to, stderr=${r.stderr}`);
assert.ok(r.json, 'stdout must be valid JSON on error');
assert.ok(typeof r.json.error === 'string', 'error field must be present');
assert.ok(r.json.error.includes('--to'), 'error must mention --to');
});
test('preserves bullets without PR trailer in extracted output', (_t) => {
// Fixture with one no-PR bullet and one PR bullet.
const CHANGELOG_NO_PR = [
'# Changelog',
'',
'## [2.0.0] - 2026-01-01',
'',
'### Fixed',
'',
'- Documented fix without PR reference.',
'- Fix with PR reference. (#999)',
].join('\n');
const r = runExtract(['--from', '1.9.9', '--to', '2.0.0', '--json'], CHANGELOG_NO_PR);
assert.equal(r.status, 0, `stderr=${r.stderr}`);
assert.ok(r.json, 'stdout must be valid JSON');
const section = r.json.releases[0].sections[0];
assert.equal(section.bullets.length, 2, 'both bullets (with and without PR) must be captured');
const noPrBullet = section.bullets.find((b) => b.pr === null);
assert.ok(noPrBullet, 'bullet without PR trailer must be present with pr: null');
assert.ok(noPrBullet.body.includes('Documented fix'), 'body text preserved');
const prBullet = section.bullets.find((b) => b.pr === 999);
assert.ok(prBullet, 'bullet with PR trailer must still be captured');
});
// F2: pre-release entries must be excluded from range queries
test('F2: pre-release entry 1.0.0-rc.1 is excluded from range --from 0.9.9 --to 1.0.0', (_t) => {
const CHANGELOG_WITH_PRERELEASE = [
'# Changelog',
'',
'## [1.0.0] - 2026-03-01',
'',
'### Added',
'',
'- Stable release. (#10)',
'',
'## [1.0.0-rc.1] - 2026-02-28',
'',
'### Added',
'',
'- Release candidate. (#9)',
'',
'## [0.9.9] - 2026-02-01',
'',
'### Fixed',
'',
'- Prior fix. (#8)',
].join('\n');
const r = runExtract(['--from', '0.9.9', '--to', '1.0.0', '--json'], CHANGELOG_WITH_PRERELEASE);
assert.equal(r.status, 0, `stderr=${r.stderr}`);
assert.ok(r.json, 'stdout must be valid JSON');
const versions = r.json.releases.map((rel) => rel.version);
assert.ok(versions.includes('1.0.0'), '1.0.0 must be in range');
assert.ok(!versions.includes('1.0.0-rc.1'), '1.0.0-rc.1 (pre-release) must be excluded from range');
assert.ok(!versions.includes('0.9.9'), '0.9.9 must not be in range (exclusive from)');
});
// F3: linked-header format ## [1.42.1](url) - date must parse date correctly
test('F3: linked-header ## [1.42.1](url) - date parses date correctly', (_t) => {
const CHANGELOG_LINKED = [
'# Changelog',
'',
'## [1.42.1](https://github.com/example/repo/releases/tag/v1.42.1) - 2026-05-15',
'',
'### Fixed',
'',
'- Linked header fix. (#300)',
'',
'## [1.42.0](https://github.com/example/repo/releases/tag/v1.42.0) - 2026-05-10',
'',
'### Added',
'',
'- Linked header feature. (#299)',
].join('\n');
const { parseChangelog: _pc } = require(path.join(ROOT, 'scripts', 'changeset', 'serialize.cjs'));
const parsed = _pc(CHANGELOG_LINKED);
const r1421 = parsed.releases.find((r) => r.version === '1.42.1');
assert.ok(r1421, '1.42.1 must parse from linked header');
assert.equal(r1421.date, '2026-05-15', 'date must be extracted from linked header');
const r1420 = parsed.releases.find((r) => r.version === '1.42.0');
assert.ok(r1420, '1.42.0 must parse from linked header');
assert.equal(r1420.date, '2026-05-10', 'date must be extracted from linked header');
});
// F4: nested bullets must remain as separate bullets, not fold into parent
test('F4: nested bullets are not folded into parent bullet', (_t) => {
const CHANGELOG_NESTED = [
'# Changelog',
'',
'## [3.0.0] - 2026-06-01',
'',
'### Changed',
'',
'- Parent bullet. (#400)',
' - Nested child item.',
'- Second top-level bullet. (#401)',
].join('\n');
const { parseChangelog: _pc } = require(path.join(ROOT, 'scripts', 'changeset', 'serialize.cjs'));
const parsed = _pc(CHANGELOG_NESTED);
const rel = parsed.releases.find((r) => r.version === '3.0.0');
assert.ok(rel, '3.0.0 must parse');
const section = rel.sections[0];
// The nested bullet terminates the parent; second top-level bullet is separate.
// We must have both PR 400 and PR 401 as distinct bullets.
const prs = section.bullets.map((b) => b.pr);
assert.ok(prs.includes(400), 'parent bullet pr=400 must be captured');
assert.ok(prs.includes(401), 'second top-level bullet pr=401 must be captured');
// The nested child must NOT have been folded into parent body
const parentBullet = section.bullets.find((b) => b.pr === 400);
assert.ok(!parentBullet.body.includes('Nested child'), 'nested child must not be folded into parent body');
});
// F5+F6: 4-part headers and v-prefix in-file headers
test('F5+F6: 4-part version in CHANGELOG is skipped, v-prefixed version parses without v', (_t) => {
const CHANGELOG_EDGE = [
'# Changelog',
'',
'## [v1.0.0] - 2026-04-01',
'',
'### Fixed',
'',
'- v-prefixed header fix. (#500)',
'',
'## [1.0.0.1] - 2026-03-15',
'',
'### Fixed',
'',
'- 4-part version fix. (#501)',
'',
'## [0.9.9] - 2026-03-01',
'',
'### Fixed',
'',
'- Old fix. (#499)',
].join('\n');
const { parseChangelog: _pc } = require(path.join(ROOT, 'scripts', 'changeset', 'serialize.cjs'));
const parsed = _pc(CHANGELOG_EDGE);
// F6: v-prefixed version should be stored without the leading v
const v100 = parsed.releases.find((r) => r.version === '1.0.0');
assert.ok(v100, 'v-prefixed header must parse as version 1.0.0 (v stripped)');
// Confirm extract skips 1.0.0.1 (4-part) — it appears in parsed but won't
// satisfy SEMVER_RE inside the range filter
const r = runExtract(['--from', '0.9.9', '--to', '1.0.0', '--json'], CHANGELOG_EDGE);
assert.equal(r.status, 0, `stderr=${r.stderr}`);
const versions = r.json.releases.map((rel) => rel.version);
assert.ok(versions.includes('1.0.0'), '1.0.0 must be in range');
assert.ok(!versions.includes('1.0.0.1'), '1.0.0.1 (4-part) must be excluded from range');
});
// F1: workflows/update.md must reference the extract subcommand invocation.
// allow-test-rule: reads a product workflow .md file (not CJS source) to verify
// the user-facing instruction was wired; there is no behavioural runtime to invoke.
test('F1: workflows/update.md contains concrete extract subcommand invocation', (_t) => {
const workflowPath = path.join(ROOT, 'gsd-core', 'workflows', 'update.md');
const workflowText = fs.readFileSync(workflowPath, 'utf8');
// The invocation uses either a direct path or an intermediate variable:
// node "$GSD_DIR/scripts/changeset/cli.cjs" extract
// node "$GSD_CHANGESET_CLI" extract
// Accept either form so future refactors don't immediately trip this anchor.
assert.ok(
workflowText.includes('cli.cjs" extract') || workflowText.includes('cli.cjs extract') ||
(workflowText.includes('GSD_CHANGESET_CLI') && workflowText.includes('" extract')),
'update.md must invoke cli.cjs extract (fix for #3496 BLOCKER 1)',
);
assert.ok(
workflowText.includes('--from') && workflowText.includes('--to'),
'update.md extract invocation must include --from and --to flags',
);
assert.ok(
workflowText.includes('--json'),
'update.md extract invocation must use --json for structured output',
);
assert.ok(
workflowText.includes('EXTRACT_EXIT') || workflowText.includes('EXTRACT_JSON'),
'update.md must capture exit code or JSON output from extract',
);
});
// F2: update.md must use the INSTALLED path ($GSD_DIR/scripts/changeset/cli.cjs),
// NOT the old broken path ($GSD_DIR/gsd-core/scripts/changeset/cli.cjs).
// The installer copies scripts/changeset/ into <configDir>/scripts/changeset/,
// so the runtime path is $GSD_DIR/scripts/changeset/cli.cjs (#935).
// allow-test-rule: reads a product workflow .md file (not CJS source) to verify
// the runtime install path contract; there is no behavioural runtime to invoke.
test('F2: update.md CLI path is $GSD_DIR/scripts/changeset/cli.cjs (not gsd-core/scripts/…) (#935)', (_t) => {
const workflowPath = path.join(ROOT, 'gsd-core', 'workflows', 'update.md');
const workflowText = fs.readFileSync(workflowPath, 'utf8');
// The correct installed path must appear somewhere in the update workflow
assert.ok(
workflowText.includes('scripts/changeset/cli.cjs'),
'update.md must reference scripts/changeset/cli.cjs',
);
// The old broken path ($GSD_DIR/gsd-core/scripts/changeset/cli.cjs) must not appear
assert.ok(
!workflowText.includes('gsd-core/scripts/changeset/cli.cjs'),
'update.md must NOT reference the old gsd-core/scripts/changeset/cli.cjs path (fix for #935)',
);
});
// F3: update.md must guard against the CLI being missing (not pure silent-swallow)
// allow-test-rule: reads a product workflow .md file (not CJS source) to verify
// the guard is present; there is no behavioural runtime to invoke.
test('F3: update.md has an explicit guard when changeset CLI is missing (#935)', (_t) => {
const workflowPath = path.join(ROOT, 'gsd-core', 'workflows', 'update.md');
const workflowText = fs.readFileSync(workflowPath, 'utf8');
// The workflow must check for CLI existence before invoking it
assert.ok(
workflowText.includes('GSD_CHANGESET_CLI') && workflowText.includes('! -f'),
'update.md must guard against a missing changeset CLI with [ ! -f "$GSD_CHANGESET_CLI" ] (#935)',
);
});
});
describe('changeset cli render: file-I/O wrapper (#2975)', () => {
test('exits 0 with consumed=N when N fragments are folded into CHANGELOG.md and deleted', () => {
cleanup(path.join(tmp, '.changeset'));
fs.writeFileSync(
path.join(tmp, 'CHANGELOG.md'),
'# Changelog\n\n## [Unreleased]\n\n## [1.0.0] - 2026-01-01\n\n### Fixed\n\n- prior fix (#1)\n',
);
writeFragment('aaa-bbb-ccc', 'Fixed', 100, 'fragment-driven fix.');
writeFragment('ddd-eee-fff', 'Added', 101, 'fragment-driven feature.');
const r = runRender(['--version', '1.1.0', '--date', '2026-05-01']);
assert.equal(r.status, 0, `stderr=${r.stderr}`);
assert.equal(r.report.consumed, 2);
assert.equal(r.report.failures.length, 0);
// Round-trip: parsing the resulting CHANGELOG must reflect the new release
// and preserve the prior one.
const text = fs.readFileSync(path.join(tmp, 'CHANGELOG.md'), 'utf8');
const parsed = parseChangelog(text);
const v110 = parsed.releases.find((r) => r.version === '1.1.0');
assert.ok(v110, 'new 1.1.0 release present');
assert.deepEqual(
v110.sections.map((s) => ({ type: s.type, prs: s.bullets.map((b) => b.pr) })),
[{ type: 'Added', prs: [101] }, { type: 'Fixed', prs: [100] }],
);
const v100 = parsed.releases.find((r) => r.version === '1.0.0');
assert.ok(v100, 'prior 1.0.0 release preserved');
assert.equal(v100.sections[0].bullets[0].pr, 1);
// Fragments deleted after consumption.
const remaining = fs.readdirSync(path.join(tmp, '.changeset'));
assert.deepEqual(remaining.filter((f) => f.endsWith('.md')), []);
});
});
// ---------------------------------------------------------------------------
// GROUP A — #690 regression guard (real repo CHANGELOG.md)
// ---------------------------------------------------------------------------
describe('changeset cli #690 regression: CHANGELOG.md has 1.3.0 and 1.3.1 entries', () => {
const CHANGELOG_PATH = path.join(ROOT, 'CHANGELOG.md');
test('CHANGELOG.md has dated 1.3.0 and 1.3.1 release headings (regression #690)', () => {
const text = fs.readFileSync(CHANGELOG_PATH, 'utf8');
const { releases } = parseChangelog(text);
const stableReleases = releases.filter((r) => r.version !== 'Unreleased');
const v130 = stableReleases.find((r) => r.version === '1.3.0');
assert.ok(v130, 'CHANGELOG.md must contain a release entry for version 1.3.0');
assert.ok(v130.date !== null && v130.date !== '', '1.3.0 entry must have a non-null, non-empty date');
const v131 = stableReleases.find((r) => r.version === '1.3.1');
assert.ok(v131, 'CHANGELOG.md must contain a release entry for version 1.3.1');
assert.ok(v131.date !== null && v131.date !== '', '1.3.1 entry must have a non-null, non-empty date');
});
test('extract 1.2.0->1.3.1 against repo CHANGELOG returns both 1.3.x releases (regression #690)', () => {
const r = cp.spawnSync(
process.execPath,
[SCRIPT, 'extract', '--from', '1.2.0', '--to', '1.3.1', '--changelog', CHANGELOG_PATH, '--json'],
{ encoding: 'utf8' },
);
const json = (() => { try { return JSON.parse(r.stdout); } catch { return null; } })();
assert.equal(r.status, 0, `expected exit 0 but got ${r.status}; stderr=${r.stderr}; stdout=${r.stdout}`);
assert.ok(json, 'stdout must be valid JSON');
const versions = (json.releases || []).map((rel) => rel.version);
assert.ok(versions.includes('1.3.0'), `releases array must include 1.3.0; got: ${JSON.stringify(versions)}`);
assert.ok(versions.includes('1.3.1'), `releases array must include 1.3.1; got: ${JSON.stringify(versions)}`);
});
});
// ---------------------------------------------------------------------------
// GROUP B — unit tests for the (not-yet-implemented) `verify` subcommand
// ---------------------------------------------------------------------------
function runVerify(args, changelogText) {
const changelogFile = path.join(tmp, 'CHANGELOG-verify-test.md');
fs.writeFileSync(changelogFile, changelogText);
const r = cp.spawnSync(
process.execPath,
[SCRIPT, 'verify', '--changelog', changelogFile, ...args],
{ encoding: 'utf8' },
);
return {
status: r.status,
stdout: r.stdout || '',
stderr: r.stderr || '',
};
}
describe('changeset cli verify subcommand (not yet implemented — TDD red step)', () => {
// Fixture: inline-URL heading form ## [1.3.1](url) - 2026-06-04
const FIXTURE_URL_HEADING = [
'# Changelog',
'',
'## [1.3.1](https://www.npmjs.com/package/@opengsd/gsd-core/v/1.3.1) - 2026-06-04',
'',
'### Fixed',
'',
'- Some fix. (#42)',
'',
'## [1.2.0] - 2026-05-31',
'',
'### Added',
'',
'- Some feature. (#10)',
].join('\n');
// Fixture: plain dated heading ## [1.3.1] - 2026-06-04
const FIXTURE_PLAIN_HEADING = [
'# Changelog',
'',
'## [1.3.1] - 2026-06-04',
'',
'### Fixed',
'',
'- Some fix. (#42)',
'',
'## [1.2.0] - 2026-05-31',
'',
'### Added',
'',
'- Some feature. (#10)',
].join('\n');
// Fixture: version absent (only Unreleased + 1.2.0)
const FIXTURE_NO_131 = [
'# Changelog',
'',
'## [Unreleased]',
'',
'## [1.2.0] - 2026-05-31',
'',
'### Added',
'',
'- Some feature. (#10)',
].join('\n');
// Fixture: heading present but NO date
const FIXTURE_NO_DATE = [
'# Changelog',
'',
'## [1.3.1]',
'',
'### Fixed',
'',
'- Some fix. (#42)',
].join('\n');
test('verify --version 1.3.1 exits 0 when inline-URL dated heading is present', () => {
const r = runVerify(['--version', '1.3.1'], FIXTURE_URL_HEADING);
assert.equal(r.status, 0, `expected exit 0; stderr=${r.stderr}`);
});
test('verify --version 1.3.1 exits 0 when plain dated heading is present', () => {
const r = runVerify(['--version', '1.3.1'], FIXTURE_PLAIN_HEADING);
assert.equal(r.status, 0, `expected exit 0; stderr=${r.stderr}`);
});
test('verify --version 1.3.1 exits 1 when version heading is absent', () => {
const r = runVerify(['--version', '1.3.1'], FIXTURE_NO_131);
assert.equal(r.status, 1, `expected exit 1; stderr=${r.stderr}`);
});
test('verify --version 1.3.1 exits 1 when heading has no date', () => {
const r = runVerify(['--version', '1.3.1'], FIXTURE_NO_DATE);
assert.equal(r.status, 1, `expected exit 1; stderr=${r.stderr}`);
});
test('verify --version 1.3.1 with no match emits non-empty stderr/message', () => {
const r = runVerify(['--version', '1.3.1'], FIXTURE_NO_131);
assert.ok(
(r.stderr && r.stderr.trim().length > 0) || (r.stdout && r.stdout.trim().length > 0),
'must emit a non-empty error message to stderr or stdout when version not found',
);
});
test('verify --version 1.3.x exits 1 for invalid semver', () => {
// Use any non-empty fixture; the version check should fail before reading the file.
const r = runVerify(['--version', '1.3.x'], FIXTURE_PLAIN_HEADING);
assert.equal(r.status, 1, `expected exit 1 for invalid semver 1.3.x; stderr=${r.stderr}`);
});
test('verify --version v1.3.1 (v-prefixed) exits 0 when dated heading present', () => {
// The leading `v` must be stripped, matching extract's behavior.
const FIXTURE_DATED = [
'# Changelog',
'',
'## [1.3.1] - 2026-06-04',
'',
'### Fixed',
'',
'- Some fix. (#42)',
].join('\n');
const r = runVerify(['--version', 'v1.3.1'], FIXTURE_DATED);
assert.equal(r.status, 0, `expected exit 0 for v-prefixed version; stderr=${r.stderr}`);
});
test('verify --version 1.3.1 --json exits 0 and emits ok/version/date JSON fields', () => {
const FIXTURE_DATED = [
'# Changelog',
'',
'## [1.3.1] - 2026-06-04',
'',
'### Fixed',
'',
'- Some fix. (#42)',
].join('\n');
const changelogFile = path.join(tmp, 'CHANGELOG-verify-test.md');
fs.writeFileSync(changelogFile, FIXTURE_DATED);
const r = cp.spawnSync(
process.execPath,
[SCRIPT, 'verify', '--version', '1.3.1', '--json', '--changelog', changelogFile],
{ encoding: 'utf8' },
);
assert.equal(r.status, 0, `expected exit 0; stderr=${r.stderr}`);
const json = (() => { try { return JSON.parse(r.stdout); } catch { return null; } })();
assert.ok(json, 'stdout must be valid JSON');
assert.strictEqual(json.ok, true, 'json.ok must be true');
assert.strictEqual(json.version, '1.3.1', 'json.version must equal "1.3.1"');
assert.ok(json.date && json.date.length > 0, 'json.date must be non-empty');
});
test('verify --version 1.3.1-rc.1 (pre-release) exits 1', () => {
// Non-stable-triplet semver is rejected by the verify subcommand.
const r = runVerify(['--version', '1.3.1-rc.1'], FIXTURE_PLAIN_HEADING);
assert.equal(r.status, 1, `expected exit 1 for pre-release version; stderr=${r.stderr}`);
});
});
// ---------------------------------------------------------------------------
// GROUP C — render --allow-empty
// ---------------------------------------------------------------------------
describe('changeset cli render --allow-empty', () => {
// Helper: run render for a specific test-local tmp directory.
function runRenderIn(dir, args = []) {
const r = cp.spawnSync(
process.execPath,
[SCRIPT, 'render', '--repo', dir, ...args, '--json'],
{ encoding: 'utf8' },
);
return {
status: r.status,
report: r.stdout && r.stdout.length ? JSON.parse(r.stdout) : null,
stderr: r.stderr || '',
};
}
function runVerifyIn(dir, version) {
const changelogPath = path.join(dir, 'CHANGELOG.md');
const r = cp.spawnSync(
process.execPath,
[SCRIPT, 'verify', '--version', version, '--changelog', changelogPath],
{ encoding: 'utf8' },
);
return { status: r.status, stdout: r.stdout || '', stderr: r.stderr || '' };
}
// Test 1: --allow-empty with zero fragments writes a dated heading +
// placeholder, and subsequent verify exits 0.
test('--allow-empty with zero fragments writes dated heading + placeholder; verify exits 0', () => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-ae-'));
try {
fs.mkdirSync(path.join(dir, '.changeset'), { recursive: true });
// Only a README — no fragment files.
fs.writeFileSync(
path.join(dir, '.changeset', 'README.md'),
'# Changesets\n\nThis folder holds changeset fragments.\n',
);
fs.writeFileSync(
path.join(dir, 'CHANGELOG.md'),
'# Changelog\n\n## [Unreleased]\n',
);
const r = runRenderIn(dir, ['--version', '9.9.9', '--date', '2026-06-05', '--allow-empty']);
assert.equal(r.status, 0, `render exited non-zero; stderr=${r.stderr}`);
assert.equal(r.report.consumed, 0, 'consumed must be 0 for empty run');
assert.equal(r.report.failures.length, 0, 'no failures expected');
assert.strictEqual(r.report.written, true, 'report.written must be true');
// The CHANGELOG must now contain a dated heading for 9.9.9.
const text = fs.readFileSync(path.join(dir, 'CHANGELOG.md'), 'utf8');
const parsed = parseChangelog(text);
const rel = parsed.releases.find((r) => r.version === '9.9.9');
assert.ok(rel, 'release 9.9.9 must appear in CHANGELOG after --allow-empty render');
assert.equal(rel.date, '2026-06-05', 'release date must be 2026-06-05');
// The placeholder line must be present in the raw text.
assert.ok(
text.includes('_No notable changes._'),
'CHANGELOG must contain _No notable changes._ placeholder',
);
// verify must exit 0 for this version.
const vr = runVerifyIn(dir, '9.9.9');
assert.equal(vr.status, 0, `verify must exit 0 after --allow-empty render; stderr=${vr.stderr}`);
} finally {
cleanup(dir);
}
});
// Test 2: render WITHOUT --allow-empty and zero fragments early-exits —
// CHANGELOG is not created / not modified. Regression lock.
test('render without --allow-empty and zero fragments does NOT write CHANGELOG', () => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-ae-'));
try {
fs.mkdirSync(path.join(dir, '.changeset'), { recursive: true });
// No fragment files, only README.
fs.writeFileSync(
path.join(dir, '.changeset', 'README.md'),
'# Changesets\n',
);
// Write a known CHANGELOG so we can verify it is unchanged.
const originalChangelog = '# Changelog\n\n## [Unreleased]\n';
fs.writeFileSync(path.join(dir, 'CHANGELOG.md'), originalChangelog);
const r = runRenderIn(dir, ['--version', '9.9.8', '--date', '2026-06-05']);
assert.equal(r.status, 0, `render without --allow-empty exited non-zero; stderr=${r.stderr}`);
assert.equal(r.report.consumed, 0, 'consumed must be 0');
assert.equal(r.report.failures.length, 0, 'no failures expected');
// report.written must NOT be set (undefined or absent).
assert.ok(
r.report.written === undefined || r.report.written === null || r.report.written === false,
'report.written must not be true in the no-op path',
);
// CHANGELOG must be byte-identical to the original.
const text = fs.readFileSync(path.join(dir, 'CHANGELOG.md'), 'utf8');
assert.equal(text, originalChangelog, 'CHANGELOG must be unchanged when no fragments and no --allow-empty');
} finally {
cleanup(dir);
}
});
// Test 3: render WITH fragments + --allow-empty behaves exactly like normal
// render (consumes/deletes fragments, NO placeholder injected).
test('render --allow-empty with fragments behaves like normal render (no placeholder)', () => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-ae-'));
try {
fs.mkdirSync(path.join(dir, '.changeset'), { recursive: true });
fs.writeFileSync(
path.join(dir, '.changeset', 'fix-one.md'),
'---\ntype: Fixed\npr: 200\n---\nFragment-driven fix.\n',
);
fs.writeFileSync(
path.join(dir, 'CHANGELOG.md'),
'# Changelog\n\n## [Unreleased]\n',
);
const r = runRenderIn(dir, ['--version', '9.9.7', '--date', '2026-06-05', '--allow-empty']);
assert.equal(r.status, 0, `render with fragments exited non-zero; stderr=${r.stderr}`);
assert.equal(r.report.consumed, 1, 'one fragment must be consumed');
assert.equal(r.report.failures.length, 0, 'no failures expected');
const text = fs.readFileSync(path.join(dir, 'CHANGELOG.md'), 'utf8');
// Placeholder must NOT appear when there are real fragments.
assert.ok(
!text.includes('_No notable changes._'),
'placeholder must NOT appear when fragments were consumed',
);
// The fragment bullet must be present.
const parsed = parseChangelog(text);
const rel = parsed.releases.find((r) => r.version === '9.9.7');
assert.ok(rel, 'release 9.9.7 must appear in CHANGELOG');
assert.equal(rel.date, '2026-06-05', 'release date must be 2026-06-05');
const prs = rel.sections.flatMap((s) => s.bullets.map((b) => b.pr));
assert.ok(prs.includes(200), 'pr=200 bullet must be present in the release');
// Fragment file must be deleted.
const remaining = fs.readdirSync(path.join(dir, '.changeset'))
.filter((f) => f.endsWith('.md') && f !== 'README.md');
assert.deepEqual(remaining, [], 'fragment must be deleted after consumption');
// verify must exit 0.
const vr = runVerifyIn(dir, '9.9.7');
assert.equal(vr.status, 0, `verify must exit 0 after render with fragments; stderr=${vr.stderr}`);
} finally {
cleanup(dir);
}
});
// Test 4 (idempotency): after a fragmentful render, a second render
// --allow-empty for the SAME version is now a NO-OP (FIX 1 guard). It must
// NOT add a second heading, must exit 0, and must report alreadyPromoted:true.
test('idempotency: second --allow-empty render for same version is a no-op (no duplicate heading)', () => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-ae-'));
try {
fs.mkdirSync(path.join(dir, '.changeset'), { recursive: true });
fs.writeFileSync(
path.join(dir, '.changeset', 'fix-two.md'),
'---\ntype: Fixed\npr: 300\n---\nIdempotency test fix.\n',
);
fs.writeFileSync(
path.join(dir, 'CHANGELOG.md'),
'# Changelog\n\n## [Unreleased]\n',
);
// First render: with a fragment.
const r1 = runRenderIn(dir, ['--version', '9.9.6', '--date', '2026-06-05']);
assert.equal(r1.status, 0, `first render exited non-zero; stderr=${r1.stderr}`);
assert.equal(r1.report.consumed, 1, 'first render must consume 1 fragment');
// verify after first render must succeed.
const vr1 = runVerifyIn(dir, '9.9.6');
assert.equal(vr1.status, 0, `verify after first render must exit 0; stderr=${vr1.stderr}`);
// Second render --allow-empty: zero fragments now, same version.
// This is now a NO-OP due to the already-promoted guard (FIX 1).
const r2 = runRenderIn(dir, ['--version', '9.9.6', '--date', '2026-06-05', '--allow-empty']);
assert.equal(r2.status, 0, `second render exited non-zero; stderr=${r2.stderr}`);
assert.equal(r2.report.consumed, 0, 'second render must consume 0 fragments');
assert.strictEqual(r2.report.alreadyPromoted, true, 'second render must report alreadyPromoted:true');
// Exactly ONE ## [9.9.6] heading must be present — no duplicate.
const text = fs.readFileSync(path.join(dir, 'CHANGELOG.md'), 'utf8');
const parsed = parseChangelog(text);
const all996 = parsed.releases.filter((r) => r.version === '9.9.6');
assert.equal(
all996.length, 1,
`exactly one 9.9.6 heading must be present after two renders; found ${all996.length}`,
);
// verify must still exit 0.
const vr2 = runVerifyIn(dir, '9.9.6');
assert.equal(vr2.status, 0, `verify after second render must still exit 0; stderr=${vr2.stderr}`);
} finally {
cleanup(dir);
}
});
// Test 4b (stale fragments): alreadyPromoted + fragments present → render exits
// NON-ZERO, CHANGELOG is NOT modified, and the fragment file is NOT deleted.
// This guards the inconsistent-state scenario identified in the adversarial review:
// a manual/partial promotion wrote the heading but left fragments unconsumed.
test('alreadyPromoted + fragments present: exits non-zero, CHANGELOG unchanged, fragment survives', () => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-ae-'));
try {
fs.mkdirSync(path.join(dir, '.changeset'), { recursive: true });
// CHANGELOG already has a dated heading for 3.3.3 (out-of-band promotion).
const originalChangelog = [
'# Changelog',
'',
'## [Unreleased]',
'',
'## [3.3.3] - 2026-01-01',
'',
'### Fixed',
'',
'- x (#1)',
'',
].join('\n');
fs.writeFileSync(path.join(dir, 'CHANGELOG.md'), originalChangelog);
// A fragment file is still present — unconsumed.
const fragmentPath = path.join(dir, '.changeset', 'leftover.md');
fs.writeFileSync(fragmentPath, '---\ntype: Fixed\npr: 9\n---\nleftover fragment\n');
// Run render for the same version.
const r = runRenderIn(dir, ['--version', '3.3.3', '--date', '2026-06-05', '--allow-empty']);
// Must exit non-zero.
assert.notEqual(r.status, 0, `expected non-zero exit for alreadyPromoted+fragments; got ${r.status}`);
// report.alreadyPromoted must be true and report.error must be present.
assert.strictEqual(r.report.alreadyPromoted, true, 'report.alreadyPromoted must be true');
assert.ok(typeof r.report.error === 'string' && r.report.error.length > 0, 'report.error must be a non-empty string');
assert.ok(r.report.error.includes('3.3.3'), 'report.error must mention the version');
// Fragment file must still exist — render must NOT have deleted it.
assert.ok(fs.existsSync(fragmentPath), 'leftover fragment must still exist after non-zero exit');
// CHANGELOG must be byte-identical to the original — render must NOT have modified it.
const text = fs.readFileSync(path.join(dir, 'CHANGELOG.md'), 'utf8');
assert.equal(text, originalChangelog, 'CHANGELOG must be unchanged');
// Exactly one ## [3.3.3] heading must be present (no duplicate added).
const parsed = parseChangelog(text);
const all333 = parsed.releases.filter((rel) => rel.version === '3.3.3');
assert.equal(all333.length, 1, `exactly one 3.3.3 heading must be present; found ${all333.length}`);
} finally {
cleanup(dir);
}
});
// Test 5 (cold start): --allow-empty when CHANGELOG.md does NOT exist creates
// the file with # Changelog, ## [Unreleased], and a dated release with placeholder.
test('--allow-empty cold start (no CHANGELOG.md) creates file with expected structure', () => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-ae-'));
try {
fs.mkdirSync(path.join(dir, '.changeset'), { recursive: true });
// No CHANGELOG.md, no fragments.
const r = runRenderIn(dir, ['--version', '8.8.8', '--date', '2026-06-05', '--allow-empty']);
assert.equal(r.status, 0, `render exited non-zero; stderr=${r.stderr}`);
assert.equal(r.report.consumed, 0, 'consumed must be 0');
assert.strictEqual(r.report.written, true, 'report.written must be true');
const changelogPath = path.join(dir, 'CHANGELOG.md');
assert.ok(fs.existsSync(changelogPath), 'CHANGELOG.md must be created');
const text = fs.readFileSync(changelogPath, 'utf8');
// Must contain a top-level heading.
assert.ok(text.includes('# Changelog'), 'must contain # Changelog heading');
// Must contain an ## [Unreleased] block.
assert.ok(text.includes('## [Unreleased]'), 'must contain ## [Unreleased] block');
// Must contain a dated release heading for 8.8.8.
assert.ok(text.includes('## [8.8.8] - 2026-06-05'), 'must contain dated release heading for 8.8.8');
// Must contain the placeholder.
assert.ok(text.includes('_No notable changes._'), 'must contain _No notable changes._ placeholder');
// parseChangelog must see the release with the correct date.
const parsed = parseChangelog(text);
const rel = parsed.releases.find((r) => r.version === '8.8.8');
assert.ok(rel, 'release 8.8.8 must appear in parsed CHANGELOG');
assert.equal(rel.date, '2026-06-05', 'release date must be 2026-06-05');
// verify must exit 0.
const vr = runVerifyIn(dir, '8.8.8');
assert.equal(vr.status, 0, `verify must exit 0 after cold-start --allow-empty render; stderr=${vr.stderr}`);
} finally {
cleanup(dir);
}
});
// Test 6: --allow-empty (zero fragments) on a CHANGELOG that already has a
// prior dated release PRESERVES that prior release in the output.
test('--allow-empty preserves prior dated release below new section', () => {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-ae-'));
try {
fs.mkdirSync(path.join(dir, '.changeset'), { recursive: true });
// Pre-existing CHANGELOG with a prior dated release.
const priorChangelog = [
'# Changelog',
'',
'## [Unreleased]',
'',
'## [1.0.0] - 2026-01-01',
'',
'### Fixed',
'',
'- Old fix. (#1)',
'',
].join('\n');
fs.writeFileSync(path.join(dir, 'CHANGELOG.md'), priorChangelog);
const r = runRenderIn(dir, ['--version', '2.0.0', '--date', '2026-06-05', '--allow-empty']);
assert.equal(r.status, 0, `render exited non-zero; stderr=${r.stderr}`);
assert.equal(r.report.consumed, 0, 'consumed must be 0');
assert.strictEqual(r.report.written, true, 'report.written must be true');
const text = fs.readFileSync(path.join(dir, 'CHANGELOG.md'), 'utf8');
// New release must appear.
assert.ok(text.includes('## [2.0.0]'), 'new 2.0.0 heading must be present');
assert.ok(text.includes('_No notable changes._'), 'placeholder must be present');
// Prior release must survive.
assert.ok(text.includes('## [1.0.0] - 2026-01-01'), 'prior 1.0.0 heading must be preserved');
assert.ok(text.includes('- Old fix. (#1)'), 'prior release bullet must be preserved');
// Parse and assert both releases are present.
const parsed = parseChangelog(text);
const rel200 = parsed.releases.find((r) => r.version === '2.0.0');
assert.ok(rel200, '2.0.0 must appear in parsed CHANGELOG');
assert.equal(rel200.date, '2026-06-05', '2.0.0 date must be 2026-06-05');
const rel100 = parsed.releases.find((r) => r.version === '1.0.0');
assert.ok(rel100, '1.0.0 must still appear in parsed CHANGELOG');
assert.equal(rel100.date, '2026-01-01', '1.0.0 date must be preserved');
assert.equal(rel100.sections[0].bullets[0].pr, 1, 'pr=1 bullet in 1.0.0 must be preserved');
// verify for the new version must exit 0.
const vr = runVerifyIn(dir, '2.0.0');
assert.equal(vr.status, 0, `verify must exit 0 after --allow-empty on existing CHANGELOG; stderr=${vr.stderr}`);
} finally {
cleanup(dir);
}
});
});
// ---------------------------------------------------------------------------
// GROUP D — render --preview (#759)
// ---------------------------------------------------------------------------
describe('changeset cli render --preview (#759)', () => {
// Helper: reset the shared tmp dir to a clean state for preview tests.
function resetTmp() {
// Remove CHANGELOG.md if present.
const changelogPath = path.join(tmp, 'CHANGELOG.md');
if (fs.existsSync(changelogPath)) {
fs.unlinkSync(changelogPath);
}
// Remove any leftover .changeset/*.md fragments.
const changesetDir = path.join(tmp, '.changeset');
if (fs.existsSync(changesetDir)) {
for (const f of fs.readdirSync(changesetDir)) {
if (f.endsWith('.md') && f !== 'README.md') {
fs.unlinkSync(path.join(changesetDir, f));
}
}
}
}
// Reset state before each preview test so a new test added to this group
// can never inherit a CHANGELOG.md or fragments left by the previous one.
beforeEach(resetTmp);
test('render --preview prints the section to stdout and mutates nothing', () => {
writeFragment('preview-frag-one', 'Added', 900, 'preview-added-feature');
const fragmentPath = path.join(tmp, '.changeset', 'preview-frag-one.md');
const r = runRenderRaw(['--version', '9.9.0', '--date', '2026-01-02', '--preview']);
assert.equal(r.status, 0, `expected exit 0; stderr=${r.stderr}`);
assert.ok(r.stdout.includes('## [9.9.0]'), `stdout must contain ## [9.9.0]; got: ${r.stdout}`);
assert.ok(r.stdout.includes('### Added'), `stdout must contain ### Added; got: ${r.stdout}`);
assert.ok(r.stdout.includes('preview-added-feature'), `stdout must contain fragment body; got: ${r.stdout}`);
// CHANGELOG.md must NOT have been created.
assert.ok(!fs.existsSync(path.join(tmp, 'CHANGELOG.md')), 'CHANGELOG.md must NOT be created by --preview');
// Fragment file must still exist.
assert.ok(fs.existsSync(fragmentPath), 'fragment file must still exist after --preview');
});
test('render --preview with zero fragments emits the placeholder and writes nothing', () => {
// No fragments written — zero-fragment scenario.
const r = runRenderRaw(['--version', '9.9.0', '--date', '2026-01-02', '--preview']);
assert.equal(r.status, 0, `expected exit 0; stderr=${r.stderr}`);
assert.ok(r.stdout.includes('## ['), `stdout must contain a release heading; got: ${r.stdout}`);
assert.ok(r.stdout.includes('_No notable changes._'), `stdout must contain placeholder; got: ${r.stdout}`);
// CHANGELOG.md must NOT have been created.
assert.ok(!fs.existsSync(path.join(tmp, 'CHANGELOG.md')), 'CHANGELOG.md must NOT be created by zero-fragment --preview');
});
test('render --preview --json returns preview text in report with consumed 0', () => {
writeFragment('preview-frag-two', 'Fixed', 901, 'preview-fixed-bug');
const fragmentPath = path.join(tmp, '.changeset', 'preview-frag-two.md');
// runRender appends --json automatically.
const r = runRender(['--version', '9.9.0', '--date', '2026-01-02', '--preview']);
assert.equal(r.status, 0, `expected exit 0; stderr=${r.stderr}`);
assert.ok(r.report, 'report must be parseable JSON');
assert.strictEqual(r.report.consumed, 0, 'consumed must be 0 for preview');
assert.strictEqual(r.report.fragmentCount, 1, 'fragmentCount must be 1');
assert.ok(typeof r.report.preview === 'string', 'report.preview must be a string');
assert.ok(r.report.preview.includes('## [9.9.0]'), `report.preview must contain ## [9.9.0]; got: ${r.report.preview}`);
// Fragment file must still exist.
assert.ok(fs.existsSync(fragmentPath), 'fragment file must still exist after --preview --json');
});
test('render --preview with an existing CHANGELOG.md leaves it byte-identical and shows only the new section', () => {
// Seed an existing CHANGELOG with a prior dated release.
const changelogPath = path.join(tmp, 'CHANGELOG.md');
const existing =
'# Changelog\n\n## [1.0.0] - 2020-01-01\n\n### Added\n\n- old prior feature (#1)\n';
fs.writeFileSync(changelogPath, existing);
writeFragment('preview-frag-three', 'Added', 902, 'brand-new-thing');
const before = fs.readFileSync(changelogPath, 'utf8');
const r = runRenderRaw(['--version', '9.9.0', '--date', '2026-01-02', '--preview']);
assert.equal(r.status, 0, `expected exit 0; stderr=${r.stderr}`);
// Output shows the new section...
assert.ok(r.stdout.includes('## [9.9.0]'), `stdout must contain new heading; got: ${r.stdout}`);
assert.ok(r.stdout.includes('brand-new-thing'), `stdout must contain new fragment body; got: ${r.stdout}`);
// ...and NOT the prior release history (preview is the new section only).
assert.ok(!r.stdout.includes('## [1.0.0]'), `preview must NOT include prior releases; got: ${r.stdout}`);
assert.ok(!r.stdout.includes('old prior feature'), `preview must NOT include prior bullets; got: ${r.stdout}`);
// Existing CHANGELOG.md must be byte-identical — preview mutates nothing.
assert.strictEqual(
fs.readFileSync(changelogPath, 'utf8'),
before,
'CHANGELOG.md must be byte-identical after --preview',
);
});
});