encore-testing

# Run with Encore (recommended - sets up infrastructure)
encore test
 
# Or run directly with npm
npm test

// api.test.ts
import { describe, it, expect } from "vitest";
import { getUser } from "./api";
 
describe("getUser endpoint", () => {
  it("returns the user by ID", async () => {
    const user = await getUser({ id: "123" });
    expect(user.id).toBe("123");
    expect(user.name).toBeDefined();
  });
});

// user.test.ts
import { describe, it, expect, beforeEach } from "vitest";
import { createUser, getUser, db } from "./user";
 
describe("user operations", () => {
  beforeEach(async () => {
    // Clean up before each test
    await db.exec`DELETE FROM users`;
  });
 
  it("creates and retrieves a user", async () => {
    const created = await createUser({ email: "test@example.com", name: "Test" });
    const retrieved = await getUser({ id: created.id });
    
    expect(retrieved.email).toBe("test@example.com");
  });
});

// order.test.ts
import { describe, it, expect } from "vitest";
import { createOrder } from "./order";
 
describe("order service", () => {
  it("creates an order and notifies user service", async () => {
    // Service calls work normally in tests
    const order = await createOrder({
      userId: "user-123",
      items: [{ productId: "prod-1", quantity: 2 }],
    });
    
    expect(order.id).toBeDefined();
    expect(order.status).toBe("pending");
  });
});

import { describe, it, expect } from "vitest";
import { getUser } from "./api";
import { APIError } from "encore.dev/api";
 
describe("error handling", () => {
  it("throws NotFound for missing user", async () => {
    await expect(getUser({ id: "nonexistent" }))
      .rejects
      .toThrow("user not found");
  });
 
  it("throws with correct error code", async () => {
    try {
      await getUser({ id: "nonexistent" });
    } catch (error) {
      expect(error).toBeInstanceOf(APIError);
      expect((error as APIError).code).toBe("not_found");
    }
  });
});

// notifications.test.ts
import { describe, it, expect, vi } from "vitest";
import { orderCreated } from "./events";
 
describe("pub/sub", () => {
  it("publishes order created event", async () => {
    const messageId = await orderCreated.publish({
      orderId: "order-123",
      userId: "user-456",
      total: 9999,
    });
    
    expect(messageId).toBeDefined();
  });
});

// cleanup.test.ts
import { describe, it, expect } from "vitest";
import { cleanupExpiredSessions } from "./cleanup";
 
describe("cleanup job", () => {
  it("removes expired sessions", async () => {
    // Create some expired sessions first
    await createExpiredSession();
    
    // Call the endpoint directly
    await cleanupExpiredSessions();
    
    // Verify cleanup happened
    const remaining = await countSessions();
    expect(remaining).toBe(0);
  });
});

import { describe, it, expect, vi, beforeEach } from "vitest";
import { sendWelcomeEmail } from "./email";
 
// Mock external API
vi.mock("./external-email-client", () => ({
  send: vi.fn().mockResolvedValue({ success: true }),
}));
 
describe("email service", () => {
  it("sends welcome email", async () => {
    const result = await sendWelcomeEmail({ userId: "123" });
    expect(result.sent).toBe(true);
  });
});

/// <reference types="vitest" />
import { defineConfig } from "vite";
import path from "path";
 
export default defineConfig({
  resolve: {
    alias: {
      "~encore": path.resolve(__dirname, "./encore.gen"),
    },
  },
  test: {
    globals: true,
    environment: "node",
    include: ["**/*.test.ts"],
    coverage: {
      reporter: ["text", "json", "html"],
    },
  },
});

{
  "vitest.commandLine": "encore test"
}

// vite.config.ts
export default defineConfig({
  // ...
  test: {
    fileParallelism: false,  // Disable for VS Code
    // ...
  },
});