I have been building pyramid until I started mining diamonds · Diamond test Don't hesitate to...
Transcript of I have been building pyramid until I started mining diamonds · Diamond test Don't hesitate to...
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I have been building pyramid until I started
mining diamonds
Jan Koszela
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TL;DR1. System.out.println(„Hello World!!”);
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System.out.println(„Hello World!!”);
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System.out.println(„Hello World!!”);
● Jan Koszela● Eclipse Poland Limited at Wrocław● Java Developer / Analyst● 4.5 y. of comm. exp. based on Java web stack, ● automotive, e-commerce● linkedin.com/in/jan-koszela-6bb38583
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TL;DR1. System.out.println(„Hello World!!”);
2. Software testing pyramid
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Software testing Pyramid
https://twitter.com/pierreyvesrevaz/status/811185305315381248
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Software testing Pyramid
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Software testing Pyramid
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Software testing Pyramid
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Software testing Pyramid
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Software testing Pyramid
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Software testing Pyramid
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TL;DR1. System.out.println(„Hello World!!”);
2. Software testing pyramid
3. Integration tests
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Integration tests
https://onsizzle.com/i/unittests-passing-nointegrationitests-unit-tests-passing-no-integration-tests-53c8003af57f45e4be46960b62cf6627
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Integration tests
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Integration tests
http://whisper.sh
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Integration tests
https://sqa.stackexchange.com/questions/37623/is-inverted-test-pyramid-really-anti-pattern
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Integration tests
https://sqa.stackexchange.com/questions/37623/is-inverted-test-pyramid-really-anti-pattern
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Question 1
Is the inverted test pyramid really anti-pattern?
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Answer
https://memegenerator.net/instance/63124251/what-if-i-told-you-matrix-morpheus-what-if-i-told-you-it-depends
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TL;DR1. System.out.println(„Hello World!!”);
2. Software testing pyramid
3. Integration tests
4. Ice-cream cone „pattern” cases
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Ice-cream cone „pattern” cases
https://i.imgflip.com/1xnwer.jpg
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Ice-cream cone „pattern” cases
You are working with legacy code
https://miro.medium.com/max/2625/1*zwjz6gaMniKBhSJC69RjxQ.jpeghttps://images-eu.ssl-images-amazon.com/images/I/518yKmNefUL.jpg
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Ice-cream cone „pattern” cases
You have an integration to a specialized physical
device
https://www.paypal.com/us/webapps/mpp/credit-card-reader-how-to/chip-card-readerhttps://www.reichelt.com/de/pl/terminal-kartowy-w-drodze-lub-w-sklepie-sumup-air-p236236.html
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Ice-cream cone „pattern” cases
You have an integration to a third party API
https://blog.restcase.com/internal-vs-external-apis/https://dzone.com/articles/an-api-first-development-approach-1
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Question 2
https://i.ytimg.com/vi/8SWo2hOcCeA/maxresdefault.jpg
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Answer
https://lenorediane.files.wordpress.com/2010/08/no-ice-cream.jpg?w=300&h=300
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Question 3
https://www.meme-arsenal.com/en/create/meme/909707
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Solution??
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Solution??
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;)
https://www.memgenerator.net
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TL;DR1. System.out.println(„Hello World!!”);
2. Software testing pyramid
3. Integration tests
4. Ice-cream cone „pattern” cases
5. Diamond test
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Diamond test
https://image.slidesharecdn.com/shinebrightlikeadiamond-kyrame-121114195639-phpapp01/95/shine-bright-like-a-diamond-kyrame-1-638.jpg?cb=1352923049
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Diamond test
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Diamond test● Benefits:
– We have confidence that the code does what it should– Immediate stacktrace feedback thanks to fast-fail
convention– Realistic inputs, expected outputs, we don’t care about
code, because it does what it should– Easier maintenance
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Diamond test
● Don't hesitate to adjust the project to your architecture needs● Best case of the pyramid usage, is use it as a guide● In real-world projects more accurately is to use sometimes what we called the DIAMOND TEST● Integration tests as the major part diamond test are still reasonable and relevant for test models
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Diamond testYou have an integration
to a third party API
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TL;DR1. System.out.println(„Hello World!!”);
2. Software testing pyramid
3. Integration tests
4. Ice-cream cone „pattern” cases
5. Diamond test
6. API first approach
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API first approach
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Question 4
What are the benefits of an API-First Approach?
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Answer
https://www.slideshare.net/wso2.org/wso2-integration-summit-johannesburg-2019-building-a-successful-api-management-strategy
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Question 5
How we are able to defend our microservicefrom external API?
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AnswerTry defensive programming
https://imgflip.com/i/3c1enw
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Quiz
JDBC == DbC
???
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Indeed x2 :D● JDBC -> JavaDatabase
Connectivity● DbC -> Design by
Contract
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTtfIweKTrQRYo0pwaDDxhqygbSay5m3gEyzBZUXxIxBGmSbcPKwQ&s
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TL;DR1. System.out.println(„Hello World!!”);
2. Software testing pyramid
3. Integration tests
4. Ice-cream cone „pattern” cases
5. Diamond test
6. API first approach
7. Design by Contract
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Design by Contract
https://luisespinal.wordpress.com/2012/11/19/design-by-contract-by-example/
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Design by Contract
https://github.com/andresteingress/gcontracts/wiki/An-Introduction-to-Programming-by-Contract
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Design by Contract
Preconditions
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Design by Contract
Preconditions
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Design by Contract
Preconditions
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Design by Contract
Preconditions
https://hashnode.com/post/overly-defensive-programming-hacker-noon-cjdqdozzs037y8rwuh89v8w0m
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Design by Contract
Postconditions: E2E
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Design by Contract
Postconditions: Integration tests :)
https://springframework.guru/wp-content/uploads/2018/06/Test_Output-1024x246.png
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Design by Contract
Postconditions: Unit Tests
https://on.notist.cloud/slides/deck2561/large-3.jpg
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Integration tests:● Not only important from the Diamond Test POV,
but also for Pyramid or Ice-cream cone models● Potentially more effective compared to unit tests,
because we operate on real data. The more data we have, the more resistant application we have got
● Potentially are slower compared to unit tests, but we could improve it, by using in-memory data (quasi integration)
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Take aways:● Software test pyramid is a guide for preference
depends on software architecture and client needs. It is not a panacea for everything
● Ice-cream cone anti-pattern still may apply to real use case mostly for legacy code at monolith architecture
● Diamond test model is well suited for microservice-based architecture in real world projects
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Take aways:● Building applications based on API-first strategy
allows organizations to develop and maintained efficiently for all devices, platforms a operations systems
● To reduce a risk of failure from integration with third party API try defensive programming
● Contract programming should be used in key areas of our application, like inputs, on which data we depend
● It’s worth writing integration tests because they are based on real data
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●https://sqa.stackexchange.com/questions/37623/is-inverted-test-pyramid-really-anti-pattern
●https://leeorengel.com/software-testing-best-practices/
●https://blog.restcase.com/internal-vs-external-apis/
●https://labs.spotify.com/2018/01/11/testing-of-microservices/
●https://www.slideshare.net/Applitools/visual-regression-testing-at-the-speed-of-unit-testing-by-gil-tayar
●https://swagger.io/resources/articles/adopting-an-api-first-approach/
●https://luisespinal.wordpress.com/2012/11/19/design-by-contract-by-example/
Source of knowledge
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Questions?
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Feedback
http://bit.do/piramidy_i_diamenty
https://docs.google.com/forms/d/e/1FAIpQLSdZiUukHvMOupvQnjY6_bJgiVeFMjbQ18rgUUxVU3Jh8FGgaQ/viewform