Comprehensive Guide to Testing Checkout Flows
A Brief History of Online Checkout
Today we take for granted being able to purchase products and services with the click of a button on our phones and laptops. But the online checkout process is actually a relatively new innovation that has radically transformed commerce over the past few decades…
In 1994, Pizza Hut introduced the first online food order. This kicked off the ecommerce boom. As internet adoption grew in the late 1990s, retailers saw the need to transition from brick-and-mortar stores into online businesses. And with that came the challenge of building user-friendly checkout flows to facilitate online payments.
In the beginning, the checkout process was full of friction. But over years of growth and testing, checkouts have evolved to meet rising consumer expectations around simplicity, security and convenience.
However, even with improvements, the average shopping cart abandonment rate remains dangerously high at 69.57% according to Baymard Institute. This underscores why rigorously testing checkouts across devices and browsers continues to be hugely impactful on conversion rates and revenue.
The Growing Need for Checkout Testing
As commerce has shifted online, the need to test checkouts has dramatically escalated. Consider that:
- Global ecommerce sales grew nearly 50% from 2019 to 2021
- Mcommerce now comprises 72% of digital sales
- Google reports 90% of users switch devices/apps during tasks
With more transactions occurring online and especially on mobile, testing payment flows on real devices in real mobile use conditions has become absolutely essential:
| Year | Site Traffic From Mobile |
| 2014 | 25% |
| 2017 | 50% |
| 2021 | 72% |
Failure to test mobile checkouts risks alienating customers and losing sales.
This guide will cover everything you need to know to effectively test critical checkout functionality…
Checkout Testing Overview
Checkout testing validates the final flow where users input payment details to complete online transactions. Specifics will vary but it generally involves:
- Validating UI/UX across devices
- Confirming payment integrations functionality
- Checking tax/shipping cost calculations
- Testing security protections
- Analyzing performance metrics
- And more…
Thorough testing ultimately reduces abandonments during payment which severely hurts conversion rates.
Let‘s explore types of testing techniques to harden checkout flows…
Checkout Testing Best Practices
Follow these best practices when verifying checkout implementations:
Simplify Design
Keep payment forms clean and frictionless:
- Only collect essential user data
- Offer guest checkout without accounts
- Support one-click payments if possible
Mobile Optimization
Cater to small touch screens:
- Increase button sizes for fat fingers
- Validate gesture interactions
- Test mobile keyboards
Localization
Provide geography-targeted experiences:
- Dynamic currencies and languages
- Region-specific payment methods
- Customizable tax rates
Rigorous Validation
Exhaustively test across conditions:
- All viewports and devices
- Top browsers and OS versions
- Peak loading and users
Now let‘s explore specific testing methods…
Types of Checkout Testing
Utilize a combination of testing techniques to catch issues:
Functional Testing
Confirm core checkout functionality:
- Data validations
- Calculations
- Integrations
- Notifications
- Error handling
Sample test case:
- Enter invalid credit card number
- Verify error message appears
- Submit corrected payment details
- Validate successful transaction
UI Testing
Assess visual presentation across devices:
- Layouts
- Responsiveness
- Style adherence
- Expected UI elements
Cross-browser Testing
Check rendering on target browsers:
| Desktop | Mobile |
| Chrome | Safari |
| Firefox | Chrome |
| Edge | Stock Browsers |
Identify defects like overlap, clipping, slowness.
Performance Testing
Gauge speed under load:
- Response times
- Error rates
- Uptime
Red flags include latency beyond 1-2 seconds.
Security Testing
Validate encryption and protections:
- TLS/SSL certificates
- SQL injections
- Cross-site vulnerabilities
- 3rd party risk assessments
Catch flaws exposing customer payment data.
Automated Testing
Enable continuous assessment across combinations:
- Headless browser testing
- Parallel test execution
- Faster feedback cycles
Now let‘s discuss key areas to assess during validation…
Checkout Testing Checklist
| [ ] Mobile responsiveness | Images resize, elements don‘t overlap, text doesn‘t truncate |
| [ ] Geo-support | Localized currencies, languages, payment options |
| [ ] Tax/shipping calculations | Correct rates applied automatically |
| [ ] Site performance | Page load times under 2 secs during peak |
| [ ] Payment integration | Smooth connectivity without errors |
| [ ] Visual cross-browser | No defects on target browsers |
This captures common areas for validation during checkout testing. Prioritize ones aligned to your business needs.
Some additional things to consider:
- Testing on real mobile devices
- Automating repeat test cases
- Monitoring checkout performance
These practices will help ingrain checkout testing within the development lifecycle to drive continuous improvements.
Now let‘s discuss troubleshooting approaches for common issues spotted during checking testing…
Troubleshooting Checkout Testing Issues
Here are fixes for 5 checkout testing problems:
Slow Load Times
- Simplify page
- Resize/compress images
- Minify JS/CSS
- Upgrade hosting plan
Mobile Visual Defects
- Increase button sizes
- Reduce form fields
- Use scrollable layouts
Payment Integration Failures
- Double check credentials
- Log requests for debugging
- Retry failed transactions
Cross-Browser Layout Issues
- Standardize CSS/JavaScript
- Leverage frameworks like Bootstrap
- Feature detection over browsers targeting
Flaky Automated Tests
- Improve element selectors
- Update tests to match latest UI
- Isolate test dependencies
Fixing these common problems leads to seamless checkout performance across all platforms and browsers…
Key Takeaways
To recap effective checkout testing:
- Focus on mobile checkout optimization
- Rigorously test across real devices and browsers
- Automate repetitive test cases
- Monitor speed and errors proactively
- Remediate issues quickly
By following these tips and best practices outlined, you will reduce checkout abandonments and boost online revenue over the long term.
Hopefully this guide gives a comprehensive overview of critical elements in strategically testing checkout functionality from visual design to security protections. Please reach out with any other checkout testing questions!
