Can each component be tested for "Non-Regression" at the functional level ?

Tests

Do acceptance tests exist? Are they applied based on a "test driven development" approach?

Precisions

Functional tests and test cases allow to increase the reliability of developments and to avoid inefficient software operations that require multiple updates and consume resources without providing needed functionality. In addition to user dissatisfaction, development teams are also frustrated because they have to deal with poor quality without being able to progress in their jobs.

Use Case

Continous integration