Initial commit

packages/blog/src/application/use-cases/create-article.use-case.test.ts

@@ -0,0 +1,68 @@
+import { describe, expect, it } from "vitest";
+import { ZodError } from "zod";
+import {
+  createArticleUseCase,
+  createArticleOutputSchema,
+} from "@/application/use-cases/create-article.use-case";
+import { MockArticlesRepository } from "@/infrastructure/repositories/articles.repository.mock";
+import type { IArticlesRepository } from "@/application/repositories/articles.repository.interface";
+
+describe("createArticleUseCase", () => {
+  it("creates an article in draft status with auto-generated slug", async () => {
+    const repo = new MockArticlesRepository();
+    const useCase = createArticleUseCase(repo);
+
+    const result = await useCase({
+      title: "Hello World",
+      content: "body",
+      authorId: "u1",
+    });
+    expect(result.title).toBe("Hello World");
+    expect(result.slug).toBe("hello-world");
+    expect(result.status).toBe("draft");
+    expect(result.id).toBeTruthy();
+
+    const stored = await repo.getArticle(result.id);
+    expect(stored).toBeDefined();
+  });
+
+  it("uses provided slug when supplied", async () => {
+    const repo = new MockArticlesRepository();
+    const useCase = createArticleUseCase(repo);
+
+    const result = await useCase({
+      title: "Whatever",
+      content: "body",
+      authorId: "u1",
+      slug: "custom-slug",
+    });
+    expect(result.slug).toBe("custom-slug");
+  });
+});
+
+describe("createArticleUseCase output validation", () => {
+  it("throws when repository returns a malformed article", async () => {
+    const repo = {
+      createArticle: async () => ({ id: 1 }) as unknown as never,
+    } as unknown as IArticlesRepository;
+    const useCase = createArticleUseCase(repo);
+    await expect(
+      useCase({ title: "X", authorId: "u1" }),
+    ).rejects.toBeInstanceOf(ZodError);
+  });
+
+  it("exports an output schema that accepts a valid article shape", () => {
+    expect(createArticleOutputSchema).toBeDefined();
+    const result = createArticleOutputSchema.safeParse({
+      id: "a1",
+      title: "Test",
+      slug: "test",
+      content: null,
+      status: "draft",
+      authorId: "u1",
+      createdAt: new Date(),
+      updatedAt: new Date(),
+    });
+    expect(result.success).toBe(true);
+  });
+});