How To Be a Java Automated Testing Superstar

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SpringOne 2021 Session Title: How To Be a Java Automated Testing Superstar Speaker: Billy Korando, Java Developer Advocate at Oracle

Software

How to Be a Java Automated Testing
Superstar!
Billy Korando
Oracle - Java Developer Advocate ☕🥑
@BillyKorando

• Ask questions
• Reach out:
Twitter: @BillyKorando
Email: billy.korando@oracle.com
• Key link 👉 https://github.com/wkorando/java-testing-superstar
Important Notes
Copyright © 2021, Oracle and/or its affiliates
2

Copyright © 2021, Oracle and/or its affiliates
3
https://billykorando.com/

My code is perfect!
Why should I waste time writing tests?
Why Write Automated Tests?
Copyright © 2021, Oracle and/or its affiliates
4
• Substantial time and effort to write tests
• Substantial time and effort to maintain tests

🏠
Why Write Automated Tests?
Copyright © 2021, Oracle and/or its affiliates
5
CI/CD Process =>
🧱🧱🧱🧱🧱🧱
🧱🧱🧱🧱🧱🧱🧱🧱
🧱🧱🧱🧱🧱🧱🧱🧱
Automated Tests =>

Deployment Process
Copyright © 2021, Oracle and/or its affiliates
6
🌎
Deploy to Prod
👩💻🧑💻
👨💻
Developers
Commit Code
🔨
Build & Test
Code
✅✅
✅
🛴
Manual Process
Takes hours or days

The code
your code
runs on
The Dependency Iceberg
Copyright © 2021, Oracle and/or its affiliates
7
Your Code
{
• Security patches
• Performance
enhancements
• Feature
enhancements

Manual Test Costs
Copyright © 2021, Oracle and/or its affiliates
8
The high effort of regression testing code
disincentivizes keeping dependencies up-to-date

Deployment Process
Copyright © 2021, Oracle and/or its affiliates
9
🌎
Deploy to Prod
👩💻🧑💻
👨💻
Developers
Commit Code
🔨
Build & Test
Code
✅✅
✅
🏍
Automated Process
Measured in minutes

Auditable 🕵
• Can review test code, reports, and logging
Repeatable ↻
• Can re-run test suite to see if problems persists
• Can run test suite against other code base/version to see if problem exists
Additional Benefits
Copyright © 2021, Oracle and/or its affiliates
10

Whatever gives you confidence to
deploy to PROD without manual
intervention
How Many Automated Test Should I Write?
Copyright © 2021, Oracle and/or its affiliates
11

Manual testing still needed.
But it’s exploratory testing.
Manual Testing
Copyright © 2021, Oracle and/or its affiliates
12

How to be an Automated Testing
Superstar?
Copyright © 2021, Oracle and/or its affiliates
13

✅ Treat Test Code like “Production” Code
✅ Write Human Readable Tests
How to be an Automated Testing Superstar?
Copyright © 2021, Oracle and/or its affiliates
14

• Parallel test execution
• Repeated tests
• Extensions
• Selective disabling
• Default test methods
• And more!
JUnit 5 Not Covered
[Date]
Copyright © 2021, Oracle and/or its affiliates | Confidential: Internal/Restricted/Highly Restricted
15

AssertJ – Fluent Assertions
Copyright © 2021, Oracle and/or its affiliates
16

AssertJ – Fluent Assertions
Copyright © 2021, Oracle and/or its affiliates
17

✅ Write Reliable Tests
How to be an Automated Testing Superstar?
Copyright © 2021, Oracle and/or its affiliates
18

Test Containers
Copyright © 2021, Oracle and/or its affiliates
19

Test Containers
Copyright © 2021, Oracle and/or its affiliates
20
• Test against local containerized instances of remote services
• Don’t have to worry about:
• Service being down
• Test data going missing
• Maintain local instance

JFRUnit
Copyright © 2021, Oracle and/or its affiliates
21

JFRUnit
Copyright © 2021, Oracle and/or its affiliates
22
• Capture JDK Flight Recorder (JFR) Events to track system performance behavior
• Check JVM behavior consistent across systems and environments

Contract Driven Development (Spring Cloud Contract)
Copyright © 2021, Oracle and/or its affiliates
23

Contract Driven Development (Spring Cloud Contract)
Copyright © 2021, Oracle and/or its affiliates
24
• Contracts validate service fulfill defined behavior
• Contracts can be used to setup up mock of service

Junit 5, Mockito, AssertJ, and Test Containers:
https://github.com/wkorando/welcome-to-junit5-v2
Spring Cloud Contract Example:
https://github.com/wkorando/collaborative-contract-driven-development-2-0
JFRUnit:
https://github.com/wkorando/testing-tuesday/tree/main/xxx-jfr-unit
Code Examples
Copyright © 2021, Oracle and/or its affiliates
25

Thank you
26 Copyright © 2021, Oracle and/or its affiliates

How To Be a Java Automated Testing Superstar

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AI Pilot Review: The World’s First Virtual Assistant Marketing Suite 👉👉 Click Here To Get More Info 👇👇 https://sumonreview.com/ai-pilot-review/ AI Pilot Review: Key Features ✅Deploy AI expert bots in Any Niche With Just A Click ✅With one keyword, generate complete funnels, websites, landing pages, and more. ✅More than 85 AI features are included in the AI pilot. ✅No setup or configuration; use your voice (like Siri) to do whatever you want. ✅You Can Use AI Pilot To Create your version of AI Pilot And Charge People For It… ✅ZERO Manual Work With AI Pilot. Never write, Design, Or Code Again. ✅ZERO Limits On Features Or Usages ✅Use Our AI-powered Traffic To Get Hundreds Of Customers ✅No Complicated Setup: Get Up And Running In 2 Minutes ✅99.99% Up-Time Guaranteed ✅30 Days Money-Back Guarantee ✅ZERO Upfront Cost See My Other Reviews Article: (1) TubeTrivia AI Review: https://sumonreview.com/tubetrivia-ai-review (2) SocioWave Review: https://sumonreview.com/sociowave-review (3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review (4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review

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In this presentation we will share our experiences around getting started with the Globus Compute multi-user endpoint. Working with the Pharmacology group at the University of Auckland, we have previously written an application using Globus Compute that can offload computationally expensive steps in the researcher's workflows, which they wish to manage from their familiar Windows environments, onto the NeSI (New Zealand eScience Infrastructure) cluster. Some of the challenges we have encountered were that each researcher had to set up and manage their own single-user globus compute endpoint and that the workloads had varying resource requirements (CPUs, memory and wall time) between different runs. We hope that the multi-user endpoint will help to address these challenges and share an update on our progress here.

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1. How to Be a Java Automated Testing Superstar! Billy Korando Oracle - Java Developer Advocate ☕🥑 @BillyKorando

2. • Ask questions • Reach out: Twitter: @BillyKorando Email: billy.korando@oracle.com • Key link 👉 https://github.com/wkorando/java-testing-superstar Important Notes Copyright © 2021, Oracle and/or its affiliates 2

4. My code is perfect! Why should I waste time writing tests? Why Write Automated Tests? Copyright © 2021, Oracle and/or its affiliates 4 • Substantial time and effort to write tests • Substantial time and effort to maintain tests

10. Auditable 🕵 • Can review test code, reports, and logging Repeatable ↻ • Can re-run test suite to see if problems persists • Can run test suite against other code base/version to see if problem exists Additional Benefits Copyright © 2021, Oracle and/or its affiliates 10

15. • Parallel test execution • Repeated tests • Extensions • Selective disabling • Default test methods • And more! JUnit 5 Not Covered [Date] Copyright © 2021, Oracle and/or its affiliates | Confidential: Internal/Restricted/Highly Restricted 15

20. Test Containers Copyright © 2021, Oracle and/or its affiliates 20 • Test against local containerized instances of remote services • Don’t have to worry about: • Service being down • Test data going missing • Maintain local instance

22. JFRUnit Copyright © 2021, Oracle and/or its affiliates 22 • Capture JDK Flight Recorder (JFR) Events to track system performance behavior • Check JVM behavior consistent across systems and environments

24. Contract Driven Development (Spring Cloud Contract) Copyright © 2021, Oracle and/or its affiliates 24 • Contracts validate service fulfill defined behavior • Contracts can be used to setup up mock of service

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