Customer.io CI Integration

Overview

Set up CI/CD pipelines for Customer.io integrations: GitHub Actions workflow with unit + integration tests, test fixtures with automatic cleanup, pre-commit hooks, and environment-specific credential management.

Prerequisites

• GitHub repository with Node.js project
• Separate Customer.io workspace for CI testing (do NOT use production)
• GitHub Actions secrets configured

Instructions

Step 1: GitHub Actions Workflow

# .github/workflows/customerio-tests.yml
name: Customer.io Integration Tests
on:
  push:
    paths:
      - "lib/customerio-*.ts"
      - "services/customerio-*.ts"
      - "tests/customerio*"
  pull_request:
    paths:
      - "lib/customerio-*.ts"
      - "services/customerio-*.ts"

env:
  CUSTOMERIO_SITE_ID: ${{ secrets.CIO_TEST_SITE_ID }}
  CUSTOMERIO_TRACK_API_KEY: ${{ secrets.CIO_TEST_TRACK_API_KEY }}
  CUSTOMERIO_APP_API_KEY: ${{ secrets.CIO_TEST_APP_API_KEY }}
  CUSTOMERIO_REGION: us

jobs:
  unit-tests:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: npm
      - run: npm ci
      - run: npx vitest run tests/customerio --reporter=verbose
        env:
          CUSTOMERIO_DRY_RUN: "true"  # Unit tests use mocks

  integration-tests:
    runs-on: ubuntu-latest
    needs: unit-tests  # Only run if unit tests pass
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: npm
      - run: npm ci
      - name: Validate credentials
        run: |
          if [ -z "$CUSTOMERIO_SITE_ID" ]; then
            echo "::warning::CIO credentials not configured — skipping integration tests"
            exit 0
          fi
      - name: Run integration tests
        run: npx vitest run tests/customerio.integration --reporter=verbose
      - name: Cleanup test users
        if: always()
        run: npx tsx scripts/cio-cleanup-test-users.ts

Step 2: Test Fixtures and Helpers

// tests/helpers/cio-test-utils.ts
import { TrackClient, RegionUS } from "customerio-node";

const TEST_RUN_ID = `ci-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
const createdUsers: string[] = [];

export function getCioTestClient(): TrackClient {
  return new TrackClient(
    process.env.CUSTOMERIO_SITE_ID!,
    process.env.CUSTOMERIO_TRACK_API_KEY!,
    { region: RegionUS }
  );
}

export function testUserId(label: string): string {
  const id = `${TEST_RUN_ID}-${label}`;
  createdUsers.push(id);
  return id;
}

export async function cleanupTestUsers(client: TrackClient): Promise<void> {
  console.log(`Cleaning up ${createdUsers.length} test users...`);
  for (const userId of createdUsers) {
    try {
      await client.suppress(userId);
      await client.destroy(userId);
    } catch {
      // Ignore cleanup errors
    }
  }
  createdUsers.length = 0;
}

Step 3: Integration Test Suite

// tests/customerio.integration.test.ts
import { describe, it, expect, afterAll } from "vitest";
import { getCioTestClient, testUserId, cleanupTestUsers } from "./helpers/cio-test-utils";

const cio = getCioTestClient();

describe("Customer.io Integration", () => {
  afterAll(async () => {
    await cleanupTestUsers(cio);
  });

  it("should identify a new user", async () => {
    const userId = testUserId("identify-new");
    await expect(
      cio.identify(userId, {
        email: `${userId}@test.example.com`,
        created_at: Math.floor(Date.now() / 1000),
      })
    ).resolves.not.toThrow();
  });

  it("should update an existing user", async () => {
    const userId = testUserId("identify-update");
    await cio.identify(userId, { email: `${userId}@test.example.com` });
    await expect(
      cio.identify(userId, { plan: "pro", updated: true })
    ).resolves.not.toThrow();
  });

  it("should track an event on a user", async () => {
    const userId = testUserId("track-event");
    await cio.identify(userId, { email: `${userId}@test.example.com` });
    await expect(
      cio.track(userId, {
        name: "ci_test_event",
        data: { test_run: true, timestamp: Date.now() },
      })
    ).resolves.not.toThrow();
  });

  it("should track an anonymous event", async () => {
    await expect(
      cio.trackAnonymous({
        anonymous_id: testUserId("anon"),
        name: "ci_anonymous_test",
        data: { page: "/test" },
      })
    ).resolves.not.toThrow();
  });

  it("should suppress a user", async () => {
    const userId = testUserId("suppress");
    await cio.identify(userId, { email: `${userId}@test.example.com` });
    await expect(cio.suppress(userId)).resolves.not.toThrow();
  });

  it("should reject invalid credentials", async () => {
    const badClient = new (await import("customerio-node")).TrackClient(
      "invalid", "invalid", { region: (await import("customerio-node")).RegionUS }
    );
    await expect(
      badClient.identify("x", { email: "x@test.com" })
    ).rejects.toThrow();
  });
});

Step 4: Test User Cleanup Script

// scripts/cio-cleanup-test-users.ts
import { TrackClient, RegionUS } from "customerio-node";

const cio = new TrackClient(
  process.env.CUSTOMERIO_SITE_ID!,
  process.env.CUSTOMERIO_TRACK_API_KEY!,
  { region: RegionUS }
);

// Clean up any test users from failed CI runs
// This uses the ci- prefix convention from testUserId()
async function cleanup() {
  console.log("Cleaning up CI test users...");
  console.log("Note: Customer.io doesn't have a list/search API via Track API.");
  console.log("Cleanup relies on suppress+destroy for known test user IDs.");
  console.log("For bulk cleanup, use the Customer.io dashboard People filter.");
}

cleanup();

Step 5: GitHub Secrets Setup

# Set up CI secrets (use a dedicated test workspace — NEVER production)
gh secret set CIO_TEST_SITE_ID --body "your-test-site-id"
gh secret set CIO_TEST_TRACK_API_KEY --body "your-test-track-key"
gh secret set CIO_TEST_APP_API_KEY --body "your-test-app-key"

Step 6: Pre-commit Hook

# .husky/pre-commit (or lint-staged config)
npx lint-staged

// package.json
{
  "lint-staged": {
    "lib/customerio-*.ts": ["eslint --fix", "vitest related --run"],
    "services/customerio-*.ts": ["eslint --fix", "vitest related --run"]
  }
}

CI Best Practices

Practice	Rationale
Dedicated test workspace	Prevents CI from polluting dev/staging data
Unique test user IDs	Prevents collisions between parallel CI runs
Always cleanup in afterAll	Prevents accumulating stale test profiles
Rate limit awareness	Add small delays between batched API calls in CI
Skip integration tests if no creds	PRs from forks won't have secrets

Error Handling

Issue	Solution
Secrets not available in PR	Fork PRs don't get secrets — skip integration tests gracefully
Test user pollution	Use ${TEST_RUN_ID} prefix, cleanup in afterAll
Rate limiting in CI	Keep integration test count under 50 API calls
Flaky network failures	Add retry logic to integration tests

Resources

• GitHub Actions Encrypted Secrets
• vitest Documentation

Next Steps

After CI setup, proceed to customerio-deploy-pipeline for production deployment.