Android Unit test are giving wrong result

Question

When I run a unit test for a new created project then it shows me the wrong result (Says All Tests are passed).

If you see in the image below 4 is expected while 6+2 surely not 4.

Now when I run the same test from Gradle right menu. It shows me the correct result that test has failed.

Did I do anything wrong or is this an android studio bug?

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Run configuration image

check the run configurations, i think the test is not actually running — conversation.16, Jan 09 '17 at 12:06
In the first scenario, I m clicking the little play icon left to test name. — N J, Jan 09 '17 at 12:11
That shouldn't be a problem, just check the top right of the IDE next to the run button, there should be a drop down that contains 'edit configurations' — conversation.16, Jan 09 '17 at 12:29
it should be 'JUnit' instead of 'Android JUnit' under 'Run configuration', what version of AndroidStudio you are using, I don't see an option to create 'Android JUnit' — WenChao, Jan 10 '17 at 22:49
@WenChao yes there is not Junit option I am using `Android studio 2.3 beta1` — N J, Jan 11 '17 at 03:28
I think in the first case it isn't even running the test! Try doing `Log.e()` and see if you can find it in Logcat. — Sufian, Jan 11 '17 at 09:50

score 1 · Answer 1 · answered Jan 09 '17 at 16:25

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You need to add -ea option in the "VM options" box in your 3rd image. This is to enable assertion feature for the JVM. Without this -ea, JVM just ignore assertion statement. When you run the test with gradle, it used a default configuration so that's why your test was run correctly.

answered Jan 09 '17 at 16:25

Lam

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on the first image, in the test result navigator, just right above "All test passed" if you click on the OK green button, it shows which tests did run? Ignore the -ea, it does not matter in your case :) – Lam Jan 10 '17 at 03:48
first time running test after opening Android studio says no test found – N J Jan 10 '17 at 03:54
If there is no ExampleTestClass.class file was generated under build/xxx/classes folder (do a search for all file in the build folder). If it is the case, your "test" folder somehow was not recognised as a "source" folder. Take a look at the app.iml file in your project ( ). If you are lucky then delete the file and open/import the project again will work. Or you can find someway to include "test" folder as a source folder. – Lam Jan 10 '17 at 06:20
not working its preserving the result of previous run Gradle task. – N J Jan 10 '17 at 06:38
delete the class file, or change some code or do a clean build to force it to build again. Dont run gradle test, now do you see the class file generated? – Lam Jan 10 '17 at 07:16
Now it's saying `Class not found: "com.xxx.xxx.network.UrlConstantTest"Empty test suite.` – N J Jan 10 '17 at 07:48
found this similar to your issue, hope it help : http://stackoverflow.com/questions/38056901/class-not-found-empty-test-suite-when-running-unit-tests-in-android-studio – Lam Jan 10 '17 at 09:35

Android Unit test are giving wrong result

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