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Development, testing, acceptance and production (DTAP) [1] [2] is a phased approach to software testing and deployment. The four letters in DTAP denote the following common steps: Development: The program or component is developed on a development system. This development environment might have no testing capabilities.
In software deployment, an environment or tier is a computer system or set of systems in which a computer program or software component is deployed and executed. In simple cases, such as developing and immediately executing a program on the same machine, there may be a single environment, but in industrial use, the development environment (where changes are originally made) and production ...
This environment specifically includes the underlying hardware and software which supports the actual software under test. This encompasses items such as servers, operating systems, communications tools, databases, cloud ecosystems browsers. In early testing stages only limited formal management of environments is required, if any. For example ...
Development testing is a software development process that involves the synchronized application of a broad spectrum of defect prevention and detection strategies in order to reduce software development risks, time, and costs. It is performed by the software developer or engineer during the construction phase of the software development lifecycle.
A sandbox is a testing environment that isolates untested code changes and outright experimentation from the production environment or repository [1] in the context of software development, including web development, automation, revision control, configuration management (see also change management), and patch management.
Management support is essential. Without the entire organization believing that test-driven development is going to improve the product, management may feel that time spent writing tests is wasted. [40] Unit tests created in a test-driven development environment are typically created by the developer who is writing the code being tested.