docs: link to next docs and vice versa (#1438)

1 files changed, 29 insertions, 0 deletions

diff --git a/test/docs/versions.spec.ts b/test/docs/versions.spec.ts
new file mode 100644
index 00000000..cee280fa
--- /dev/null
+++ b/test/docs/versions.spec.ts
@@ -0,0 +1,29 @@
+import { major as semverMajor } from 'semver';
+import { describe, expect, it } from 'vitest';
+import { oldVersions } from '../../docs/.vitepress/versions';
+import { version } from '../../package.json';
+
+describe('docs versions', () => {
+  describe('oldVersions', () => {
+    it('should have a complete set of oldVersions', () => {
+      const versionText = `v${version}`;
+
+      expect(oldVersions.length).toBeGreaterThanOrEqual(2);
+      const currentMajorVersion = semverMajor(versionText);
+
+      expect(oldVersions[0]).toEqual({
+        version: 'latest',
+        link: 'https://fakerjs.dev/',
+      });
+      expect(oldVersions[1]).toEqual({
+        version: 'next',
+        link: 'https://next.fakerjs.dev/',
+      });
+
+      for (let i = 2; i < oldVersions.length; i++) {
+        const oldMajorVersion = semverMajor(oldVersions[i].version);
+        expect(oldMajorVersion).toBe(currentMajorVersion - i + 1);
+      }
+    });
+  });
+});