I've seen some examples showing that running a JUnit class with the JUnitCore.runClasses(Test.class). However, we can easily run the JUnit test classes by right clicking the class file and "Run With->JUnit" in most IDEs. Then, my question is: with the IDEs, what's the usage of JUnitCore.runClasses? Is it still necessary to write JUnit classes using JUnitCore.runClasses?
JUnitCore#runClasses is usually used when you want to write a program to tests (i.e., a runner).
Since you're running from inside an IDE, there's probably no reason for you to use it in this scenario.
Related
In Netbeans after creating program and want to run a file, right click the mouse and two options are enabling,one is Test file and another one is run file. What is the difference, because i get confused so many times.
I guess from your question that you want to code some c++ or java kind of program and you want to run them individually.
So, I suggest you to use special editor for every kind of development.
Netbeans generally used for big developments (but u can use it for a single file as well) and it helps in so many other aspects...(which I suppose you don't require).
In Netbeans, Run may have different meanings depending on the type of project you're working on.
In a Java project, Run file with a green arrow means running the main method of a Java class.
You may even notice that the Run file option is grayed out if a class has not a main method.
In a Web or Enterprise project it means deploying the project to an associated application or web server.
The Test option means running any test cases for an individual file at a time or to an entire project at once. The tests cases are usually created with a Unit Test library like JUnit or TestNG. If you don't know what a unit test is you may like to read this for reference.
I hope it helps.
When I run the wizard in Eclipse, not all my methods appear in the list to add to the new test case.
Is this to say I can't test them? Or that if I somehow can, I shouldn't test them?
Thanks.
The Eclipse wizards won't show private methods - you can't call them directly hence you can't test them directly, which might be what you are seeing.
Instead of thinking about which methods you are testing, you might however want to start thinking of testing in terms of testing the behavior of the class.
I want to run my unit tests automatically when I save my Eclipse project. The project is built automatically whenever I save a file, so I think this should be possible in some way.
How do I do it? Is the only option really to get an ant script and change the project build to use the ant script with targets build and compile?
Update I will try 2 different approaches now:
Running an additional builder for my project that executes the ant target test (I have an ant script anyway)
ct-eclipse, recommended by Thorbjørn
For sure it it unwise to run all tests, because we can have for example 20.000 tests whereas our change could affect only, let's say 50 of them, among which are tests for the class we have changed and tests for classes that collaborate with our class.
There is an unseful plugin called infinitetest http://improvingworks.com/products/infinitest/ which runs only some tests ( related to class we've changed ) just after we save changes. It also integrate quite nicely with editor ( using annotations ) and problem view - displaying not-passing tests like errors.
Right click on your project > Properties > Builders > New, and there add your ant ant builder.
But, in my opinion, it is unwise to run the unit tests on each save.
See if Eclipse has a plugin for Infinitest.
I'd also consider TestNG as an alternative to JUnit. It has a lot of features that might be helpful in partitioning your unit test classes into shorter and longer running groups.
I believe you are looking for http://ct-eclipse.tigris.org/
I've experimented with the concept earlier, and my personal conclusion was that in order for this to be useful you need a lot of tests which take time. Personally I save very frequently so this would happen frequently, and I didn't find it to be an advantage. It might be different for you.
Instead we bit the bullet and set up a "build server" which watches our CVS repository and builds projects as they change. If the compilation fails or the tests fail we are notified quickly so we can remedy it.
It is as always a matter of taste what works for you. This is what I've found.
I would recommend Inifinitest for the described situation. Infinitest is nowadays a GPL v3 licensed product. Eclipse update site: http://infinitest.github.com
Then you must use INFINITEST. INFINITEST helps you to do Continuous Testing.
Whenever you make a change, Infinitest runs tests for you.
It selects tests intelligently, and only runs the ones you need. It reports unit test failures like compiler errors, and provides additional information that helps you write better tests.
I'm new to unit testing using nunit (and Java development in general). When creating unit tests for private methods on classes, it looks as though the test file must be in the same package as the class being tested. What is the typical way of avoiding exporting the APIs of the unit tests? Can I make the classes/test methods package-protected? Or do developers typically have a separate build for release that excludes unit test files?
I can tell IntelliJ or Ant not to package JUnit tests in the deployment. I have tests in a separate directory from the source code, which is what makes it possible.
Don't mingle source and test classes together. Keep them separate to make it easier for the tool/script you use to deploy.
The test file does not necessarily have to be in the same package as the class being tested. In fact, it is a good practice to have the test files in a completely separate package, allowing them to test the public API without being concerned with package-level implementation details.
Alternately, you can set up your build script (e.g. Nant) to ignore files containing "Test" when you build your release executable.
Personally my approach is only to test exposed functionality, so you end up testing well encapsulated parts only.
This usually leads my design to contain small classes with well defined functionality, which are easier to test.
Generally, when unit testing you shouldn't be concerned with the internals of what you're testing, so I find this is the best way to approach it.
I also agree it's best to seperate test and production code.
Keep test source code out of application source code. In general, only test exposed functionality. If you really need to test private behavior, create a test object that extends the real object and allows publec access to the private behavior.
I think it's a mistake to move your test code out of the package of the CUT (Class Under Test). At some point you may want to test a protected method or class, and having your test code in another package makes that hard or impossible.
A better solution is to create a separate directory for your test code that simply mirrors the package structure of your production code. Here's what I do:
src/main/java/com/example/Foo.java
src/test/java/com/example/FooTest.java
Then your build script can very simply ignore src/test/** when it comes time for packaging and deployment.
I've recently been lifted out of the .Net world into the Java world and I miss my unit tests.
Using Visual Studio I used NUnit and TestDriven.net to run my unit tests.
What is a comparable system for Java Using Eclipse?
I'm looking specifically for the plugins that will get me going, or a guide on how to do it.
I'm aware that JUnit is what NUnit was initially based on, but I want to know the best way to integrate it into Eclipse as there seem to be a few plugins that do this and I don't have the time to play around with them all.
UPDATE
Okay I didn't know that JUnit was built into the IDE. Are there any plugins that make using JUnit any easier?
Using JUnit with eclipse is actually very easy. Just go to File->New... and select JUnit Test Case. Eclipse will handle adding the JUnit library and all of the imports.
Which version of Eclipse are you using?
For as long as I remember (I've been using Eclipse since early 3.xs), Eclipse supports JUnit out of the box. You just:
Right-click on a project -> Run As -> JUnit Test
Does this not work for you?
I've been using moreUnit for a few years and can't live without its Ctrl+J shortcut to switch between the class and its test case.
I've also found EclEmma useful for finding untested code.
Easier than "Right-click on a project -> Run As -> JUnit Test"? Like you want it bound to a keypress (because it probably is). Lemme check--Yeah, alt-shift-X, then "T". Easy enough?
There is also window/show view/other/java/JUnit that will give you a junit run bar in a window. You can then just hit the run tests button and it will run all the tests in your project/section.
Ctrl-shift-L is great for figuring out keybindings if you are getting to know eclipse.
Also, get VERY familiar wtih ctrl-space, just press it whenever you're in the middle of typing something (seriously, try it with everything!) Also type "sysout[ctrl-space]"
JUnit 4 is actually really easy to use, as long as you're using a project that targets Java 5 or newer, and have added it to the project.
I mean, how much easier can you get than
#Test
public myTest() {
// Test code here
}
There are also #Before, #After, #BeforeClass, #AfterClass, and #Ignore. The *Class methods need to be static methods. #Before runs before each test, #BeforeClass runs before the first test... but keep in mind that JUnit tests can run in any order.
If you're doing database tests, you may want to look into the DBUnit addon, although you need to take some special steps to use it with JUnit 4's native mode.
What do you mean with "make using JUnit any easier"?
I use Ant for runnings tests as a task. Output will be stored into a flat file or a html file. It depends on the TestRunner.
Please specify your question and you'll get answers! :)
fit (http://www.theserverside.com/news/thread.tss?thread_id=39417)
dbunit (http://www.dbunit.org/)
many others
in eclipse, you can right click a package and select run as a junit test.
be careful of http://xunitpatterns.com/test%20fixture%20-%20ambiguous.html. iirc, this boils down to junit creating an instance of each test case before calling setup and nunit just creating one instance.
I've used the testNG which has a plug in for eclipse.