I absolutely want my POJO JUnit 4 tests running on the Android emulator VM, even if they do not reference Android APIs. The reason for this is fairly clear. Android has a different implementation of the base Java APIs, and it uses a special VM, so I want to know that all of the shared code I will take advantage of beneath the Android UI layer will run without fail on the emulator.
I hate to say this, but I am _still_ confused as to whether or not this is possible. Your eloquent answer didn't seem to answer the question specifically. Quite simply, is it even possible to run POJO JUnit 4 test suites on the Android device itself, and if so, what is the best/quickest way to achieve this from a configuration standpoint in Eclipse? On Aug 19, 4:27 pm, "A. Elk" <[email protected]> wrote: > JUnit tests Plain Old Java Objects (POJOs). Basically, it loads your > test class, runs a method, instantiates the class that you're testing, > tests the methods, does the asserts, and outputs the results. It > assumes that all the dependencies are built into the application > or .jar file or are on the classpath. > > If you want to test a method in a class that subclasses an Android > class or depends on an Android class, then you have to test within the > Android framework, which is based on JUnit 3. This means that you have > to use one of the test classes in android.test.*, and you have to use > the instrumented test runner InstrumentationTestRunner (or one of its > subclasses). Instructions for doing this are in the Android 2.2 SDK > documentation under Testing and Instrumentation. > > If you run something "inside" the emulator, you're running it in > Android, and the assumption is that it's dependent on the Android API. > For this reason, you can't test it with test cases built for JUnit 4. > However, I have to assume that since these tests are based on JUnit 4, > you wrote them prior to starting with Android, and so the classes/ > methods they test do not depend on Android (or they didn't at some > point in the past). > > For that reason, if you are *unit* testing these classes/methods, you > shouldn't have to use the emulator. You should be able to construct > the dependencies in the test fixture, run them with a JUnit 4 test > runner, do the asserts, and look at the results. I doubt that this is > possible within Android, because Android assumes that you're testing > under Android. So you'd have to use something other than the Dalvik > VM, which means you can't use the emulator (as far as I know). Seems > to me that chances are pretty slim that a test would pass in a non- > Dalvik VM and then fail in Android. > > If the classes you want to test have any dependency on Android > classes, then you *have* to test them in Android. By the way, TFJ said > that you need to do dummy implementations of Bundle and Intent. What I > think he's saying is that you have to do this to run JUnit 4 tests in > Android. If you convert your tests to JUnit 3 style, then Android > itself provides testing implementations and environments. See the > Android 2.2 SDK that I mentioned previously. > > Elk. > > On Aug 19, 8:36 am, Eric <[email protected]> wrote: > > > > > On Aug 19, 9:57 am, "The.French.DJ" <[email protected]> wrote: > > > > It depends on what parts you want to test. If you need the android > > > test framework classes for testing activities and services in a valid > > > android context then i am not sure if you can make junit 4 work with > > > it. > > > > However, if you extract your app logic into android independant > > > classes then you can test them by having junit 4 in the classpath > > > before the android jar. > > > Thank you for the info. However, what I don't understand is, will the > > JUnit 4 tests be run INSIDE the Android emulator, or outside the > > emulator on my Mac in a separate Java VM? Ideally I want the JUnit 4 > > tests to be run INSIDE the Android emulator so that I know my code > > will be 'ok' when run on an Android device. > > > - Eric -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
