This document provides an overview of testing Apache Camel K integrations using cloud native behavior driven development (BDD). It introduces Camel K and BDD testing approaches. It then demonstrates YAKS, an open source tool for running BDD feature files as tests on Kubernetes to test Camel K integrations in a cloud native way. The demo shows testing a sample greeting service integration using YAKS. Future work areas are discussed, including integrating with CI/CD pipelines and adding more capabilities to YAKS.

1. Testing Camel K integrations
with Cloud Native BDD
APACHECON @HOME
Spt, 29th – Oct. 1st 2020

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Testing Camel K integrations
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ApacheCon @Home 2020
● Open source enthusiast
● Middleware Integration
● Test Automation
● Founder of https://citrusframework.org
● Senior Software Engineer @RedHat
● Twitter: @freaky_styley
Speaker information
Christoph Deppisch

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● Apache Camel K
● Behavior Driven Development
● Why Cloud Native BDD?
● YAKS
● Demo
● Status & future work
Agenda

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Apache Camel K

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What is Camel K!?
Camel K
A lightweight integration platform,
born on Kubernetes, with serverless superpowers
https://github.com/apache/camel-k

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● Subproject of Apache Camel (https://camel.apache.org/)
○ Swiss knife of integration
○ 340+ components
○ >10 years of development - still one of the most active Apache projects
● Camel K
○ Started on August 31st, 2018
○ Reached version 1.0.0 on June 9, 2020
○ A platform for directly running integrations on Openshift and Kubernetes
○ Based on (ex Core OS) operator-sdk
What is Camel K!?

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Why integration?
My
app/service

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Why integration?
My
app/service
App BApp A
App
C

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Why Camel?
My
app/service
App
B
App
A

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Why Camel?
My
app/service
App
B
App
A
from(“pulsar://company/nsx/topic1”)
.unmarshal().json()
.transform().simple(“${body[data]}”)
.to(“knative:event/activity”)
from(“knative:event/produced”)
.pollEnrich()
.simple(“aws2-s3://bucket/fs/${header.Ce-File}”)
.to(“kafka:ext-topic”)

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● Write an integration file (Java, Groovy, Kotlin, JS, XML…)
● Execute (CLI)
● Running serverless on Kubernetes
Camel K in action
from(“knative:channel/xxxx”)
.transform()...
.to(“kafka:topic”)
$ kamel run integration.java

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How can I test
Camel K?

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Behavior Driven
Development

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Communication

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Explaining
the behavior

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Concrete
Examples

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Gherkin
Given a certain context
When some event happens
Then an outcome should occur

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● Write a feature file
● Execute (CLI)
● Running test on Kubernetes
Why BDD?
Given a certain context
When some event happens
Then an outcome should occur
$ yaks test integration.feature

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Why Cloud Native
testing?

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● Tests running within the container management platform
○ Tests as integrated part of the cloud infrastructure
○ Tests able to access internal services
○ Tests can simulate service providers
○ Tests are self contained
Why Cloud Native!?

22. Kubernetes / OpenShift
Testing Camel K integrations with Cloud Native BDD
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Why Cloud Native?
Testing tools

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YAKS

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● https://github.com/citrusframework/yaks
● Born out of Camel K
● Current version 0.1.0 on September 29, 2020
What is YAKS?
YAKS
Integration test framework to enable
Cloud Native BDD testing on Kubernetes

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Framework to run Gherkin
BDD feature files as Java
unit tests
1st class tool support in IDE
Open Source ACL 2.0
Test framework with focus on
messaging integration
Powerful validation for message
content such as Json, XML,
plaintext, ...
Open Source ACL 2.0

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Feature: Todo service
Background:
Given URL: http://todo.service
Scenario: Health check
Given wait for URL http://todo.service to return 200 OK
Then path /health is healthy
Scenario: Create task
Given variable id is "citrus:randomNumber(5)"
Given HTTP request body: {"id": "${id}", "task": "New task", "completed": 0}
When send POST /todo/${id}
Then receive HTTP 201 CREATED
Scenario: GET
When send GET /todo/${id}
Then verify HTTP response body: {"id": "${id}", "task": "New task", "completed": 0}
And receive HTTP 200 OK

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$ yaks test integration.feature

28. YAKS architecture
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references
Kubernetes / OpenShift
Operation Runtime
yaks CLI
runtime
http
Runtime
jms
kafka
knative
openapi
YAKS
Operator
operator
Test
defines
uses
watches/manages
Maven registry
System Under
Test
invokes/verifies
tools
install
csv
generates
OLM
watches
reconciles
use
Operator
API
Development
compile
generates

29. 29
Demo time!

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greeting-service
en: “Hello ApacheCon!”
de: “Hallo ApacheCon!”
fr: “Bonjour ApacheCon!”
it: “Ciao ApacheCon!”
esp: “Hola ApacheCon!”
greeting.feature
Http GET /en

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greeting-service
greeting.feature
topic: greetings
Http POST /en
{“message”: “Hello ApacheCon!” }

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greeting-splitter
greeting-service
greeting.feature
topic: greetings
Http POST /en
{“message”: “Hello ApacheCon!” }

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greeting-splitter
greeting-service
greeting.feature
topic: greetings
topic: greetings
Http POST /en
{“message”: “Hello ApacheCon!” }
“Hello”
“ApacheCon!”
“Hello”
“ApacheCon!”

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● Attract community by helping to test
○ Camel K
○ Knative
○ Kafka
● Integrate test approach with CI pipelines (Tekton)
● Autodiscover infrastructure components (message brokers, APIs, DBs, ...)
● Contract driven testing (Open API)
● Visual tooling
Get involved! https://github.com/citrusframework/yaks/issues
Future work

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