feat(blog): add per-feature InversifyJS container (symbols, module, container)

packages/blog/src/di/container.test.ts

@@ -0,0 +1,36 @@
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { blogContainer } from "./container";
+import { BLOG_SYMBOLS } from "./symbols";
+import { BlogModule } from "./module";
+import { MockArticlesRepository } from "@/infrastructure/repositories/mock-articles.repository";
+import type { IArticlesRepository } from "@/application/repositories/articles-repository.interface";
+
+describe("blogContainer", () => {
+  beforeEach(() => {
+    blogContainer.unbindAll();
+    blogContainer.load(BlogModule);
+  });
+
+  afterEach(() => {
+    blogContainer.unbindAll();
+  });
+
+  it("resolves IArticlesRepository to MockArticlesRepository by default binding", () => {
+    const repo = blogContainer.get<IArticlesRepository>(
+      BLOG_SYMBOLS.IArticlesRepository,
+    );
+    expect(repo).toBeInstanceOf(MockArticlesRepository);
+  });
+
+  it("supports rebinding to a custom repo", () => {
+    blogContainer.unbind(BLOG_SYMBOLS.IArticlesRepository);
+    const custom = new MockArticlesRepository();
+    blogContainer
+      .bind<IArticlesRepository>(BLOG_SYMBOLS.IArticlesRepository)
+      .toConstantValue(custom);
+    const resolved = blogContainer.get<IArticlesRepository>(
+      BLOG_SYMBOLS.IArticlesRepository,
+    );
+    expect(resolved).toBe(custom);
+  });
+});

packages/blog/src/di/container.ts

@@ -0,0 +1,6 @@
+import "reflect-metadata";
+import { Container } from "inversify";
+import { BlogModule } from "./module";
+
+export const blogContainer = new Container({ defaultScope: "Singleton" });
+blogContainer.load(BlogModule);

packages/blog/src/di/module.ts

@@ -0,0 +1,11 @@
+import { ContainerModule, type interfaces } from "inversify";
+
+import type { IArticlesRepository } from "@/application/repositories/articles-repository.interface";
+import { MockArticlesRepository } from "@/infrastructure/repositories/mock-articles.repository";
+import { BLOG_SYMBOLS } from "./symbols";
+
+export const BlogModule = new ContainerModule((bind: interfaces.Bind) => {
+  bind<IArticlesRepository>(BLOG_SYMBOLS.IArticlesRepository).to(
+    MockArticlesRepository,
+  );
+});

packages/blog/src/di/symbols.ts

@@ -0,0 +1,3 @@
+export const BLOG_SYMBOLS = {
+  IArticlesRepository: Symbol.for("blog:IArticlesRepository"),
+} as const;

packages/blog/vitest.config.ts

@@ -1,3 +1,11 @@
+import path from "path";
 import { baseVitestConfig } from "@repo/typescript-config/vitest.base";
 
-export default baseVitestConfig;
+export default {
+  ...baseVitestConfig,
+  resolve: {
+    alias: {
+      "@": path.resolve(__dirname, "./src"),
+    },
+  },
+};