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Continuous testing

Testing as process support

Testing is planned, prepared, performed and evaluated in separate phases within the traditional software development process. However, when it comes to continuous testing the aim is to uncover any risks at the earliest possible point.

Key features of continuous testing include:

Ideally, continuous testing includes both functional and non-functional tests (security tests, performance tests, etc.).

In order to implement continuous testing, we look at the different stages of the software development process:

Testing & Continuous Integration

The term Continuous Integration (CI) was coined by Grady Booch in 1991. CI is the continuous integration of all development activities into the main branch. This measure is used to perform the time-consuming integration of different components in smaller increments. Breaking changes can be recognized early and tracked back to specific changes to be handled accordingly.

Quality assurance measures in continuous integration:

which are performed by the CI server as part of the build.

Unit tests are often used for code coverage specifications. What may seem like a good idea at first glance can quickly turn into the opposite. Increasing coverage is a considerable task, which does not present a major challenge to most modern development environments (IDEs). However, forcing them to do so quickly can lead to a shift from quality to quantity. The goal is to heighten the awareness of the development team by increasing the quality of unit tests through pair programming sessions and workshops.

Signs of potential for improvement in the unit test area include:

Testing & Continuous Delivery

While continuous integration ends with a tested artifact in a repository, continuous delivery also includes the next steps, namely the automated commissioning and testing of the software in different stages.

According to the motto “If it hurts, do it more often”, the frequently time consuming steps of installation and configuration are formalized and brought into an automatically reproducible and usable form.

The key terms here are “configuration as code” and “infrastructure as code”. The complete provisioning can be automated within a cloud environment.

While in the continuous delivery pipeline, the artifact goes through different stages where environmentally adapted tests are carried out automatically. Due to only small recent changes being tested, it is easier to determine what has caused the resulting problem. If any tests within a stage fail, the pipeline is aborted. The number of stages strongly depends greatly on the different types of integration tests that are executed.

Planned stations:

Testing & Continuous Deployment

As an extension to Continuous Delivery, Continuous Deployment also includes the automated deployment of each approved extension in production.

This enables a significant reduction in “time to market”, while allowing early feedback from customers. With carefully applied testing along the pipeline, few software errors are released into production. Those that managed to slip though can quickly be found and removed due the lesser amount of changes.

Supporting test measures:

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