By Michael A. Harrison
ISBN-10: 0201029553
ISBN-13: 9780201029550
Read Online or Download Introduction to formal language theory PDF
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FAIL FAST 23 By using this pattern to check the design contracts internal to a component we have effectively produced a form of unit-test code built into the component. However, these test steps are in a form that needs to be driven as part of the standard testing for the component. This pattern and testing are complementary since testing is used to show that the implementation of a component’s design is behaving correctly (shown by the asserts) whilst the asserts aid the debugging of any design violations (shown by the testing).
Improving the encapsulation of your objects helps with reliability because objects do what you expect them to do. It also helps with maintainability because you minimize the risk that extending or changing the software breaks other parts of the application or service. It also reduces testing cost by allowing you to more easily isolate an object for unit testing. However, this is at the expense of reduced flexibility. 4 Pattern Elements that Are Already in Place The patterns in this book are specified in terms of Symbian OS and describe how to reuse any of the utility libraries or services provided as part of the operating system so that you can get your solution up and running as quickly as possible.
Problem Context A single sentence that describes the environment or situations in which the problem occurs. This section provides a clear outline of the background to the problem and the assumptions that this entails. Summary Bullet points summarize each of the main forces involved in the problem that the pattern has to address. ’ Description Here, longer paragraphs expand on the bullet points in the summary. ’ In most cases, a pattern DESIGN PATTERN TEMPLATE 11 will be fully implementable by all types of developers.