Tying DevOps…to Continuous Delivery…to Testing
With basic knowledge of DevOps, it is significant to understand the immense advantage of incorporating the enterprise testing strategy into DevOps. The biggest threat in the delivery cycle to production is during the development of code. Ability is developed in the test, the cost of fixing any bug goes up after the build stage.
In the earlier ways of delivery, the majority of testing is finished close to the end of the delivery life-cycle. This testing performed during integration testing instead of during build.
In CD, the major part of testing is during development to identify issues early on. As most bugs are caused by code objects interacting with other apps the developer did not have vision into during development, early detection of these application conflicts reduces the cost of fixing the defects prior to production deployment.
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Dave Farley and Jez Humble published a book called Continuous Delivery which elaborates how to rectify all the defects of traditional application delivery. One point to be considered from the book mentions the Great Team who is assigned to the project or workflow outcome (e.g., mission or vision of the company). In this CD Team, the Application development, Business Analysts, Testing, and IT operations are all on the same team.
All the individuals from the team follow this general workflow for continuous delivery:
- The functionality and test cases are designed by the Business Analyst.
- Application Developer builds the code to fail the test cases
- Software Testers allow the ability to flow through the automated testing timeline. Testers consult developers regularly to make sure capability is tested correctly.
- IT Operations keeps all the Development code, Infrastructure code, and testing code in tight version control.
The outcome of this workflow is that every individual of this cross-functional team is accountable for the delivery process.
Major Implications for Testers
Testers add unbelievable value to the team by supporting developers test more Unit tests so this testing can be performed quickly, cost-effectively, and conveniently. The UI tests must be used as carefully as possible because it cannot be fully automated.
Inappropriately, in the past delivery approaches, the suggested pyramid for testing is upside-down. In CD, the basics of the pyramid are Unit testing which should consume the major part of test cases. User acceptance testing is on the top of the pyramid which should be the most minimal testing. In the past delivery model, unit tests are naturally minimal while user acceptance testing privileges the bulk of test cases.
The implications of this upside-down pyramid contain fixing issues when they are most expensive and most complex to the business.
The Deployment Pipeline Concept
To take benefit of right testing strategies, the Delivery Team makes a hero or story that must overthrow the blocks of quality gates. Every unit test is automated so that every application delivery generates automatic testing. Furthermore, the Delivery Team has to solve any issue before delivering the next part of the functionality.
Though this delivery is right, it only works if the software is delivered every day. Even though this procedure should contain as much automated testing as possible, some procedures are too difficult and require business acceptance testing. Still, the ease of CD and testing is decided on the unit testing, not the minimum acceptance tests.
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As proof of the advantages of automated testing, the maturity matrix for CD has the most established teams running only automated tests.
QA and testing don’t differ as a function; it is a master enabler of continuous delivery. All team individuals are answerable for code success or disaster, including the testers. Making sure that developers have the resources to keep responsibility for their code through development to delivery is one of the biggest methods to release positive abilities to production. By collaborating with testers and creating automated test cases, this enables developers more control over their code from start to finish.