By Beth Brown
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Extra info for A Guide to Programming in Java
You don’t have to read it sequentially, and you are welcome to use the table of contents to jump directly to the section you find the most relevant to you at the moment. We hope that by the time you’ve finished reading this content, you will have a clear idea of the various ways to tackle testing problems. Testing for Failures One of the goals of testing is to make sure that your code works the way it is expected to. This testing should be done either at the user level (“If I press this button, a new account gets created”) or at the programming level (“This function returns the square root of its argument”).
4 by using Javadocs comments as annotations. More details on this later. 18 Chapter 1 Getting Started ■ ■ ■ ■ We can pass additional parameters to annotations. Annotations are strongly typed, so the compiler will flag any mistakes right away. Test classes no longer need to extend anything (such as TestCase, for JUnit 3). Here is the list of annotations that TestNG supports: – @BeforeSuite, @BeforeTest, @BeforeClass, @BeforeMethod, @BeforeGroups – @AfterSuite, @AfterTest, @AfterClass, @AfterMethod, @AfterGroups – – – – @DataProvider @ExpectedExceptions @Factory @Test – @Parameters We won’t spend any more time explaining what these annotations do since we will be explaining their usage in detail in the next chapters, but you can also refer to the Javadocs in Appendix B for a quick overview at this point.
Recommendations In these sections, we have illustrated how the keywords static and final can be an obstacle to testability, and we have shown a few examples on how you can refactor code to avoid them. We have only scratched the surface of this complex problem, so if you are interested in learning more techniques to improve your code and make it more testable, we recommend you read Michael Feathers’ book Working Effectively with Legacy Code (Prentice Hall, 2005), which covers this topic extensively.
A Guide to Programming in Java by Beth Brown