Answer to Question 1
TRUE
Answer to Question 2
Testing components requires a methodology that goes beyond the framework of test parameters. If we consider components as parts that go into building something bigger, then we have to test them both independently and in the context of the whole. As building blocks, components often cannot complete a useful task by themselves, in the same manner that many parts of manufactured goods are only meaningful within their target assembly. For testing such components, the best and the most common way is to use a test harness, an application that focuses exclusively (or as exclusively as possible) on the component at hand. In addition to other benefits of component-based development, the test harness approach is the closest that software testing can come to the working of a scientific laboratory: it removes as many extraneous variables as possible from the experiment.
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Delta method advice