feat(marketing-pages): RecordingMailerService

packages/marketing-pages/src/infrastructure/services/recording-mailer.service.test.ts

@@ -0,0 +1,20 @@
+import { describe, it, expect } from "vitest";
+import { RecordingMailerService } from "@/infrastructure/services/recording-mailer.service";
+
+describe("RecordingMailerService", () => {
+  it("records welcome calls", async () => {
+    const mailer = new RecordingMailerService();
+    await mailer.sendWelcome("u1", "u1@example.com");
+    expect(mailer.sent).toEqual([{ userId: "u1", email: "u1@example.com" }]);
+  });
+
+  it("preserves call order across multiple sends", async () => {
+    const mailer = new RecordingMailerService();
+    await mailer.sendWelcome("u1", "a@x");
+    await mailer.sendWelcome("u2", "b@x");
+    expect(mailer.sent).toEqual([
+      { userId: "u1", email: "a@x" },
+      { userId: "u2", email: "b@x" },
+    ]);
+  });
+});

packages/marketing-pages/src/infrastructure/services/recording-mailer.service.ts

@@ -0,0 +1,9 @@
+import type { IMailerService } from "../../application/services/mailer.service.interface";
+
+export class RecordingMailerService implements IMailerService {
+  readonly sent: { userId: string; email: string }[] = [];
+
+  async sendWelcome(userId: string, email: string): Promise<void> {
+    this.sent.push({ userId, email });
+  }
+}