feat(blog): add getArticlesUseCase (test red until DI + mock repo exist)

packages/blog/src/application/use-cases/get-articles.use-case.test.ts

@@ -0,0 +1,64 @@
+import { beforeEach, describe, expect, it } from "vitest";
+import { blogContainer } from "@/di/container";
+import { BLOG_SYMBOLS } from "@/di/symbols";
+import type { IArticlesRepository } from "@/application/repositories/articles-repository.interface";
+import { MockArticlesRepository } from "@/infrastructure/repositories/mock-articles.repository";
+import { getArticlesUseCase } from "./get-articles.use-case";
+
+describe("getArticlesUseCase", () => {
+  let repo: MockArticlesRepository;
+
+  beforeEach(() => {
+    if (blogContainer.isBound(BLOG_SYMBOLS.IArticlesRepository)) {
+      blogContainer.unbind(BLOG_SYMBOLS.IArticlesRepository);
+    }
+    repo = new MockArticlesRepository();
+    blogContainer
+      .bind<IArticlesRepository>(BLOG_SYMBOLS.IArticlesRepository)
+      .toConstantValue(repo);
+  });
+
+  it("returns all articles with no filters", async () => {
+    const now = new Date();
+    await repo.createArticle({
+      id: "1",
+      title: "A",
+      slug: "a",
+      content: null,
+      status: "draft",
+      authorId: "u1",
+      createdAt: now,
+      updatedAt: now,
+    });
+    const result = await getArticlesUseCase();
+    expect(result).toHaveLength(1);
+    expect(result[0]?.id).toBe("1");
+  });
+
+  it("filters by status", async () => {
+    const now = new Date();
+    await repo.createArticle({
+      id: "1",
+      title: "A",
+      slug: "a",
+      content: null,
+      status: "draft",
+      authorId: "u1",
+      createdAt: now,
+      updatedAt: now,
+    });
+    await repo.createArticle({
+      id: "2",
+      title: "B",
+      slug: "b",
+      content: null,
+      status: "published",
+      authorId: "u1",
+      createdAt: now,
+      updatedAt: now,
+    });
+    const result = await getArticlesUseCase({ status: "published" });
+    expect(result).toHaveLength(1);
+    expect(result[0]?.id).toBe("2");
+  });
+});