Initial commit

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

@@ -0,0 +1,60 @@
+import { describe, expect, it } from "vitest";
+import { ZodError } from "zod";
+import {
+  getArticlesUseCase,
+  getArticlesOutputSchema,
+} from "@/application/use-cases/get-articles.use-case";
+import { MockArticlesRepository } from "@/infrastructure/repositories/articles.repository.mock";
+import { articleFactory } from "@/__factories__/article.factory";
+
+describe("getArticlesUseCase", () => {
+  it("returns all articles with no filters", async () => {
+    const repo = new MockArticlesRepository();
+    articleFactory.reset();
+    await repo.createArticle(
+      articleFactory.build({ id: "1", title: "A", slug: "a" }),
+    );
+
+    const useCase = getArticlesUseCase(repo);
+    const result = await useCase({});
+    expect(result).toHaveLength(1);
+    expect(result[0]?.id).toBe("1");
+  });
+
+  it("filters by status", async () => {
+    const repo = new MockArticlesRepository();
+    articleFactory.reset();
+    await repo.createArticle(
+      articleFactory.build({ id: "1", title: "A", slug: "a", status: "draft" }),
+    );
+    await repo.createArticle(
+      articleFactory.build({
+        id: "2",
+        title: "B",
+        slug: "b",
+        status: "published",
+      }),
+    );
+
+    const useCase = getArticlesUseCase(repo);
+    const result = await useCase({ status: "published" });
+    expect(result).toHaveLength(1);
+    expect(result[0]?.id).toBe("2");
+  });
+});
+
+describe("getArticlesUseCase output validation", () => {
+  it("throws when the repository returns a malformed article", async () => {
+    const repo = new MockArticlesRepository();
+    // bypass the mock's createArticle (which is typed) by reaching into _articles directly
+    (repo as unknown as { _articles: unknown[] })._articles.push({ id: 123 });
+
+    const useCase = getArticlesUseCase(repo);
+    await expect(useCase({})).rejects.toBeInstanceOf(ZodError);
+  });
+
+  it("exports an output schema that mirrors Article[]", () => {
+    expect(getArticlesOutputSchema).toBeDefined();
+    expect(getArticlesOutputSchema.safeParse([]).success).toBe(true);
+  });
+});