test: add test to validate changelogs for releases

Add a new test to check that the changelog files have been correctly
updated for releases.

PR-URL: https://github.com/nodejs/node/pull/45325
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

test/parallel/test-release-changelog.js

@@ -0,0 +1,89 @@
+'use strict';
+
+// This test checks that the changelogs contain an entry for releases.
+
+const common = require('../common');
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+const getDefine = (text, name) => {
+  const regexp = new RegExp(`#define\\s+${name}\\s+(.*)`);
+  const match = regexp.exec(text);
+  assert.notStrictEqual(match, null);
+  return match[1];
+};
+
+const srcRoot = path.join(__dirname, '..', '..');
+const mainChangelogFile = path.join(srcRoot, 'CHANGELOG.md');
+const versionFile = path.join(srcRoot, 'src', 'node_version.h');
+const versionText = fs.readFileSync(versionFile, { encoding: 'utf8' });
+const release = getDefine(versionText, 'NODE_VERSION_IS_RELEASE') !== '0';
+
+if (!release) {
+  common.skip('release bit is not set');
+}
+
+const major = getDefine(versionText, 'NODE_MAJOR_VERSION');
+const minor = getDefine(versionText, 'NODE_MINOR_VERSION');
+const patch = getDefine(versionText, 'NODE_PATCH_VERSION');
+const versionForRegex = `${major}\\.${minor}\\.${patch}`;
+
+const lts = getDefine(versionText, 'NODE_VERSION_IS_LTS') !== '0';
+const codename = getDefine(versionText, 'NODE_VERSION_LTS_CODENAME').slice(1, -1);
+// If the LTS bit is set there should be a codename.
+if (lts) {
+  assert.notStrictEqual(codename, '');
+}
+
+const changelogPath = `doc/changelogs/CHANGELOG_V${major}.md`;
+// Check CHANGELOG_V*.md
+{
+  const changelog = fs.readFileSync(path.join(srcRoot, changelogPath), { encoding: 'utf8' });
+  // Check title matches major version.
+  assert.match(changelog, new RegExp(`# Node\\.js ${major} ChangeLog`));
+  // Check table header
+  let tableHeader;
+  if (lts) {
+    tableHeader = new RegExp(`<th>LTS '${codename}'</th>`);
+  } else {
+    tableHeader = /<th>Current<\/th>/;
+  }
+  assert.match(changelog, tableHeader);
+  // Check table contains link to this release.
+  assert.match(changelog, new RegExp(`<a href="#${versionForRegex}">${versionForRegex}</a>`));
+  // Check anchor for this release.
+  assert.match(changelog, new RegExp(`<a id="${versionForRegex}"></a>`));
+  // Check title for changelog entry.
+  let title;
+  if (lts) {
+    title = new RegExp(`## \\d{4}-\\d{2}-\\d{2}, Version ${versionForRegex} '${codename}' \\(LTS\\), @\\S+`);
+  } else {
+    title = new RegExp(`## \\d{4}-\\d{2}-\\d{2}, Version ${versionForRegex} \\(Current\\), @\\S+`);
+  }
+  assert.match(changelog, title);
+}
+
+// Main CHANGELOG.md checks
+{
+  const mainChangelog = fs.readFileSync(mainChangelogFile, { encoding: 'utf8' });
+  // Check for the link to the appropriate CHANGELOG_V*.md file.
+  let linkToChangelog;
+  if (lts) {
+    linkToChangelog = new RegExp(`\\[Node\\.js ${major}\\]\\(${changelogPath}\\) \\*\\*Long Term Support\\*\\*`);
+  } else {
+    linkToChangelog = new RegExp(`\\[Node\\.js ${major}\\]\\(${changelogPath}\\) \\*\\*Current\\*\\*`);
+  }
+  assert.match(mainChangelog, linkToChangelog);
+  // Check table header.
+  let tableHeader;
+  if (lts) {
+    tableHeader = new RegExp(`<th title="LTS Until \\d{4}-\\d{2}"><a href="${changelogPath}">${major}</a> \\(LTS\\)</th>`);
+  } else {
+    tableHeader = new RegExp(`<th title="Current"><a href="${changelogPath}">${major}</a> \\(Current\\)</th>`);
+  }
+  assert.match(mainChangelog, tableHeader);
+  // Check the table contains a link to the release in the appropriate CHANGELOG_V*.md file.
+  const linkToVersion = new RegExp(`<b><a href="${changelogPath}#${versionForRegex}">${versionForRegex}</a></b><br/>`);
+  assert.match(mainChangelog, linkToVersion);
+}