By Marshall C. Yovits

Considering that its first quantity in 1960, Advances in pcs has offered specific insurance of suggestions in and software program and in computing device thought, layout, and functions. It has additionally supplied members with a medium within which they could learn their matters in better intensity and breadth than that allowed through typical magazine articles. for this reason, many articles became usual references that stay of vital, lasting price regardless of the speedy progress occurring within the box.

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Extra resources for Advances in Computers, Vol. 19

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For our first build job, we will keep it simple: we are just going to compile and test our sample application. Click on the New Job link. You should get to a screen similar to Figure 2-14. Jenkins supports several different types of build jobs. The two most commonly-used are the freestyle builds and the Maven 2/3 builds. The freestyle projects allow you to configure just about any sort of build job: they are highly flexible and very configurable. The Maven 2/3 builds understand the Maven project structure, and can use this to let you set up Maven build jobs with less effort and a few extra features.

Code coverage metrics are a great way to isolate code that has not been tested, in order to add extra tests for corner cases that were not properly tested during the initial development, for example. The Jenkins code coverage graphs are also a great way of keeping track of your code coverage metrics as the project grows. Indeed, as you add new tests, you will notice that Jenkins will display a graph of code coverage over time, not just the latest results (see Figure 2-32). Note that our objective here is not to improve the code coverage just for the sake of improving code coverage—we are adding an extra test to verify some code that was not previously tested, and as a result the code coverage goes up.

If you click on the failed test classes, Jenkins brings up the actual details of the test failures (see Figure 2-23), which is a great help when it comes to reproducing and fixing the issue. Figure 2-23. info Jenkins displays a host of information about the failed test in a very readable form, including the error message the test produced, the stack trace, how long the test has been broken, and how long it took to run. Often, this in itself is enough to put a developer on the right track towards fixing the issue.

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