Unit testing hippo
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During this presentation we are going to look at multiple solutions that are available for mocking JCR and go through their pros and cons. Then we are going to have look at Hippo Unit Test to see how Hippo Unit tester leverages JCR mocking to enable us to write easy to read and maintain unit tests.
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Unit testing hippo
- 1. www.openweb.nl Unit Testing Hippo By Ebrahim Aharpour CTO and Software Engineer at Openweb ebrahim@openweb.nl
- 2. www.openweb.nl Why do we write unit tests?
- 3. www.openweb.nl Why do we write unit tests? ▰ To ensure better quality ▰ To improve productivity ▰ To increase maintainability 333
- 4. www.openweb.nl What are the attributes of an Ideal unit test?
- 5. www.openweb.nl Attributes of an ideal unit test ▰ Independent ▰ Repeatable ▰ Maintainable (Easy to read and Modify) ▰ Only test a unit of code ▰ Fast ▰ Stable 555
- 6. www.openweb.nl “Stable: The test only fails, when the code under test doesn't behave as expected, not because anything else changed. Jens Schauder Spring Data team member 666
- 7. www.openweb.nl Example Replacing the following line Node subnode = node.getNode(“parent”).getNode(“subnode”); With Node subnode = node.getNode(“parent/subnode”); In a class should not break the unit tests. Because according JCR specifications these two lines always success with the same result or fails with the same error. 777
- 8. www.openweb.nl What is the solution?
- 9. www.openweb.nl Overview ▰ Mock JCR Implementations ▻ In memory JCR ▰ JCR Mocking Tool ▰ Hippo Unit Tester 999
- 10. www.openweb.nl What are the Mock JCR solutions available? ▰ Mockito based Solutions ▻ JCR Mock ▻ JCR Mock Up ▰ Object Mock based Solutions ▻ Apache Sling JCR Mock ▻ Magnolia Test Suite ▰ Jackrabbit based Solutions ▻ Jackrabbit ▻ In Memory JCR 101010
- 11. www.openweb.nl Overview ▰ Mock JCR Implementations ▻ In memory JCR ▰ JCR Mocking Tool ▰ Hippo Unit Tester 111111
- 13. www.openweb.nl Introduction In Memory JCR is a lightweight wrapper around Jackrabbit that makes setting up and tearing down a JCR repository much easier and provide tooling for mock registration of node types and namespaces without hassle. In Memory JCR keeps all the data and indexes in memory but still it places a few XML files in a Temporary folder which get deleted on shutdown. So make sure to shut down (or close) during the teardown phase. 131313
- 14. www.openweb.nl Pros ▰ Fully compliant to JCR Specs ▰ Support importing node structure as document or system view XML ▰ Easy to setup and teardown ▰ Provide utilities for registering namespaces and node types ▰ Licensed Under Apache License 2.0 141414
- 15. www.openweb.nl Cons ▰ It is rather slow (~250ms per test) in comparison with the other solutions (it is ~10 slower than Mockito based solution like “JCR Mock” and “JCR Mock Up” and ~100 times slower than “Magnolia test” and “Sling”)* ▰ Note types need to be register although there are utilities that make it trivial 151515
- 18. www.openweb.nl Overview ▰ Mock JCR Implementations ▻ In memory JCR ▰ JCR Mocking Tool ▰ Hippo Unit Tester 181818
- 20. www.openweb.nl Introduction JCR Mocking tool is an attempt to make it easier to setup a mock JCR repository via JSON or XML using any given JCR mock implementation as long is it support programmatic creation of nodes and properties. 202020
- 21. www.openweb.nl What are the Mock JCR solutions available? ▰ Mockito based Solutions ▻ JCR Mock ▻ JCR Mock Up ▰ Object Mock based Solutions ▻ Apache Sling JCR Mock ▻ Magnolia Test Suite ▰ Jackrabbit based Solutions ▻ Jackrabbit ▻ In Memory JCR 212121
- 22. www.openweb.nl Pros ▰ Make it much easier to setup test cases ▰ Make it very easy to switch between different implementation of JCR Mock due to uniform interaction with your mocking framework ▰ Tested with Magnolia tests, Apache Sling and In Memory JCR. It should be able to work with JCR Mock Up. Although it has not been tested. ▰ Licensed Under Apache License 2.0 222222
- 23. www.openweb.nl Cons ▰ Lack of Documentation. Unfortunately there isn’t any documentation available for JCR Mocking tool at this point. Any contribution is more than welcome. 232323
- 25. www.openweb.nl Usage (with Apache Sling) 252525
- 26. www.openweb.nl Usage (with In Memory Jcr) 262626
- 27. www.openweb.nl Overview ▰ Mock JCR Implementations ▻ In memory JCR ▰ JCR Mocking Tool ▰ Hippo Unit Tester 272727
- 29. www.openweb.nl Goal 29 Hippo Unit Tester is a framework that tries to take advantage of JCR mocking solutions and Hippo Mock objects to setup a mock Hippo API. It tries to be as realistic as possible while still be highly manipulatable. In order to enable developers to focus on designing their unit tests scenarios instead of focusing on technical details mocking process. 2929
- 33. www.openweb.nl Links ▰ In Memory JCR: https://github.com/openweb-nl/in- memory-jcr ▰ JCR Mocking tool: https://github.com/openweb-nl/jcr- mocking-tool ▰ Hippo Unit Tester: https://github.com/openweb- nl/hippo-unit-tester ▰ An Example of Hippo Unit Tester: http://bit.ly/2jbHQf6 333333
Editor's Notes
- 3 months ago I did a similar presentation at Hippo Meetup NL (also known as Hippo.Campus) there I went into more detail about each one these frameworks here
- 3 months ago I did a similar presentation at Hippo Meetup NL (also known as Hippo.Campus) there I went into more detail about each one these frameworks here