tests: blog suites own their fixtures — synthetic draft + EN-only posts, dynamic live roster

The owner edits content freely; accessors are what the suite pins.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/unit/blog-drafts.test.js

@@ -71,6 +71,9 @@ const FIXTURE_DIR = path.join(process.cwd(), "content", "blog", FIXTURE_SLUG);
 const DRAFT_SLUG = "_fixture-draft";
 const DRAFT_DIR = path.join(process.cwd(), "content", "blog", DRAFT_SLUG);
 
+const EN_SLUG = "_fixture-en-only";
+const EN_DIR = path.join(process.cwd(), "content", "blog", EN_SLUG);
+
 beforeAll(() => {
   fs.rmSync(FIXTURE_DIR, { recursive: true, force: true });
   fs.mkdirSync(FIXTURE_DIR, { recursive: true });
@@ -96,11 +99,18 @@ beforeAll(() => {
     path.join(DRAFT_DIR, "fr.md"),
     "---\ntitle: Brouillon\n---\n\nCorps de brouillon.\n",
   );
+  fs.rmSync(EN_DIR, { recursive: true, force: true });
+  fs.mkdirSync(EN_DIR, { recursive: true });
+  fs.writeFileSync(
+    path.join(EN_DIR, "en.md"),
+    "---\ntitle: EN Fixture\n---\n\nEnglish only body.\n",
+  );
 });
 
 afterAll(() => {
   fs.rmSync(FIXTURE_DIR, { recursive: true, force: true });
   fs.rmSync(DRAFT_DIR, { recursive: true, force: true });
+  fs.rmSync(EN_DIR, { recursive: true, force: true });
 });
 
 describe("blog public accessors (prod rule untouched)", () => {
@@ -161,7 +171,7 @@ describe("blog public accessors (prod rule untouched)", () => {
 describe("bilingual accessors", () => {
   it("reports available languages from the folder contents", () => {
     expect(getBlogLanguages("hello-world-again")).toEqual(["fr"]);
-    expect(getBlogLanguages("next")).toEqual(["en"]);
+    expect(getBlogLanguages(EN_SLUG)).toEqual(["en"]);
     expect(getBlogLanguages(FIXTURE_SLUG)).toEqual(["fr", "en"]);
   });
 
@@ -194,10 +204,10 @@ describe("bilingual accessors", () => {
     expect(en.untranslated).toBe("en");
 
     // fr requested on an en-only post: en renders, banner data present.
-    const next = await getBlogPost("next");
+    const next = await getBlogPost(EN_SLUG);
     expect(next.lang).toBe("en");
     expect(next.untranslated).toBe("fr");
-    expect(next.title).toBe("NextJs Tutorial");
+    expect(next.title).toBe("EN Fixture");
   });
 
   it("throws for unknown slugs", async () => {
@@ -218,13 +228,13 @@ describe("buildLanguageNav — banner and switcher data", () => {
 
   it("links the available language when the requested one is missing", () => {
     const frMissing = buildLanguageNav({
-      slug: "next", lang: "en", untranslated: "fr", languages: ["en"],
+      slug: EN_SLUG, lang: "en", untranslated: "fr", languages: ["en"],
     });
     expect(frMissing.switcher).toEqual([]);
     expect(frMissing.banner.text).toBe(
       "Cet article n'existe pas (encore) en français — voici la version anglaise.",
     );
-    expect(frMissing.banner.href).toBe("/blog/next/en");
+    expect(frMissing.banner.href).toBe(`/blog/${EN_SLUG}/en`);
 
     const enMissing = buildLanguageNav({
       slug: "foo", lang: "fr", untranslated: "en", languages: ["fr"],