I am trying to understand which call causes Error and Which causes failures in Junit4. Until Junit3,
Failure can be created using
junit.framework.AssertionFailedError
And Error with
junit.framework.Assert.assertEquals
But with the deprecation of junit.framework.Assert, which is not moved to org.junit.Assert, I am not able to find a way in junit4 to throw a failure. Anything I try with org.junit.Assert (even Assert.fail() ) , JUnit considers it as Error.
Any idea on how to properly generate failures in Junit4 style tests?
Update
I figured out that there is a std.err at the end of XML generated by JUnit ant target.
<system-err>TEXT here</system-err>
and I suspected this is the cause that making it ERROR instead of Failure. But when I cleared all sys.err, it still marking it ERROR.
You can still use Assert.assertThat for getting assertion failure
assertThat(0, is(1)); // fails:
assertThat(0, is(not(1))) // passes
It may not what you need, but also JUnit 4 has ComparisonFailure
Thrown when an assertEquals(String, String) fails. Create and throw a ComparisonFailure manually if you want to show users the difference between two complex strings.
I am having the same issue. The only solution I have found so far is to use a try block followed by
catch (AssertionError ae) {
fail(ae.toString());
}
But I can see downsides to this and I have seen many people say this is bad practice. Unfortunately I don't see another way around it when using ant to make a report.
Related
I have just received a new project, I have a fresh repo clone of a java spring project.
When I build it with Gradle, all the dependencies are downloaded but when one of the Gradle tasks execute, the unit tests, the build fails.
I think the problem resides in the argThat() method of Mockito that is not getting well integrated with JUnit. This is one of the places where the issue occurs:
Any time a unit tests have this kind of logic, it fails with:
The console output is not for the above test but it is a similar method with more complex logic.
The above tests still fail with the same issue.
This only happens in my machine and not on others that are on a Unix distribution, fedora.
I think the problem is due to the dependencies version, but I have tested with different ones to no avail.
I can give you more information if needed.
Thank you.
EDIT: Code - not a screenshot
#Test
void shouldAbortEventExecutionWhenJobFails() throws JobParametersInvalidException, JobExecutionAlreadyRunningException, JobRestartException, JobInstanceAlreadyCompleteException {
when(jobLauncher.run(eq(job1), argThat(jobParametersForPath(TEST_PATH_1)))).thenReturn(jobExecutionFailed);
when(job1.getName()).thenReturn("job1");
ExecutionState result = executor.execute(asList(event1, event2));
assertThat(result).isEqualTo(ExecutionState.FAILED);
verify(jobLauncher).run(eq(job1), argThat(jobParametersForPath(TEST_PATH_1)));
verify(jobLauncher, never()).run(eq(job2), argThat(jobParametersForPath(TEST_PATH_1)));
verify(jobLauncher).run(eq(job1), argThat(jobParametersForPath(TEST_PATH_2)));
verify(jobLauncher).run(eq(job2), argThat(jobParametersForPath(TEST_PATH_2)));
verifyNoMoreInteractions(jobLauncher);
}
private ArgumentMatcher<JobParameters> jobParametersForPath(String inputPath) {
return jobParameters ->
jobParameters.getParameters().get("inputFilePath").toString().equals(inputPath) &&
jobParameters.getParameters().get("outputFilePath").toString().equals(TEST_OUTPUT_PATH + "/" + inputPath) &&
jobParameters.getParameters().containsKey("timestamp");
}
I can't tell you the exact problem without inspecting your code or without reproducing your issue. But I guess the problem should be related to file paths;
I can see that there is a variable called outputFilePath inside your assertation object. in Linux environments, we use slash / for file paths, but in windows environments it's back-slashes \.
[1] https://www.howtogeek.com/181774/why-windows-uses-backslashes-and-everything-else-uses-forward-slashes/
[2] https://stackoverflow.com/a/1589959/3728639
You need to debug your Junit test and compare actual assertation object with the expected one
This question already has answers here:
Conditionally ignoring tests in JUnit 4
(5 answers)
Closed 5 years ago.
I have a junit integration test that runs on our build machine, and calls an external server. We use a gating build - so code doesn't make it in to the main branch unless we get 100% of tests passing
Occasionally, the external server goes down for a while, and the test fails, but with a definitive exception that I can catch. I really don't want the test to fail the build, therefore blocking code getting in - but I also would prefer it's not marked as "passed". So I want to sort of mark it as a warning, ignored, or indeterminate result. This would be ideal:
#Test
public void someTest()
{
try
{
do whatever
}
catch (ServerDownException theException)
{
junit.markThisTestAsIgnored(); <---- something like this
}
}
found it -
throw new AssumptionViolationException( "skipping test because xxx is down");
One option is to set a category(stress category for example).
Check out this link:
https://github.com/junit-team/junit4/wiki/categories
If you want, you can put the #Ignore rule:
https://dzone.com/articles/allowing-junit-tests-pass-test
Regards
I'm writing my first project with maven (here). When I run the tests with mvn -Dtest=EchoTest test, I get a BUILD FAILURE with
nonAcceptedTypeVerification(EchoTest) Time elapsed: 0.044 sec <<< ERROR!
java.lang.NullPointerException
at EchoTest.initialize(EchoTest.java:50)
How can I know more precisely what line in my code triggers the NullPointerExcepion ?
In other words : how to ask Maven to print the whole backtrace ?
I tried mvn -e, and searched in the target subdirectory.
EDIT
Here are the lines provoking the NullPointerException (in EchoText.java) :
#Before
public void initialize() throws InterruptedException
{
system = new EchoActorSystem();
echo_actor = system.actorOf(); <-- line 50
}
The point is that EchoActorSystem is a quite complex class and the method actorOf makes tons of work, calling many functions from system. For example it calls super.actorOf() and then fix some properties of the result, and so on.
I'm searching the faulty line by adding many Sysytem.out.println, but I'm sure that this is not the right way to work.
mvn test -Dtest=EchoTest -DtrimStackTrace=false will give you the complete stack trace.
The magic is -DtrimStackTrace=false.
Maven will default to chopping the stacktrace down to just the lines that appear in your test. Honestly this is the first time I've ever noticed this behaviour and it feels to me a very odd default (I can understand for the console output, but in the surfire-reports XML reports as well?)
You'll find the complete stacktrace it in the target/surfire-reports directory, file EchoTest.txt
Can anyone help me with my problem?
I test my program with Robotium in Junit.
My problem is:
When I detect there is a failure in junit, how can I use code to detect there is failure in program? So, I can continue run if no error occur? e.g. if no error, continue testing, else exit.
I suggest using Java's built-in assertions for your test. To create an assertion:
assert someBoolean : message;
For example:
assert (myValue == 3) : "myValue was " + myValue + ", should have been 3";
Assertions are disabled by default when running your program. To run your program with assertions, run it like this:
java -enableassertions MyClass
Then, if your program is running with this runtime option, whenever an assert is reached, the following happens:
If the boolean is true, the program will continue.
If it is false, an AssertionError is thrown with the specified message.
For example:
int myVar = 5;
assert (myVar == 3) : "myVar is " + myVar + " not 3";
results in
Exception in thread "main" java.lang.AssertionError: myVar is 5 not 3
IF assertions are enabled. Remember: all of that only happens when you enable asserts using -enableassertions or -ea. If you don't, the asserts are skipped.
When I detect there is a failure in junit, how can I use code to detect there is failure in program? So, I can continue run if no error occur? e.g. if no error, continue testing, else exit.
This doesn't make much sense. If you've got a failure in a JUnit test, that means there is a failure in your program. If no failure occurs, the unit testing will proceed to the next test automatically.
But maybe you are asking if you can do this:
// in some unit test
assert(....); // <<--- this test fails:
// Do something so that the unit test will continue to the next assertion ...
assert(....)
The answer is that you can't do that in any useful way:
The unit test framework can only report unit test failures that indicate that they have failed by terminating with an exception.
You could write a unit test to catch the exception that an assert(...) or fail(...) call throws and continue to the next assertion. But that would destroy all evidence of the previous unit test failure.
So if you want to be able to do the second assertion despite the first one failing, you need to make them separate testcases.
You might also be asking if there is a way to get the JUnit test runner to abort on the first failed unit test. The answer is yes that it is possible, but how you would do it would depend on the test runner you are using.
You can make assertions for a condition to be true or false-
assertTrue(soloObject.waitForActivity("Activity Name"));
Instead of wating for an activity you can use all the methods provided by robotium to make assertions example isTextFound("text"), isTextFound("text"), isCheckBoxChecked(index), etc.
Im am currently developing an automated "test" class (running several individual tests on other classes in the same package). The aim of the test file is to show whether each test either passed or failed. Some of the files being tested are not written correctly creating an ArrayOutOfBoundsException when running the test, that produces my test file to crash and not carry on until the end performing other tests. I am not in the position to modify code to fix the errors on the project being tested.
-> how to stop an exception from halting program execution in Java without creating any new classes
Thank for all your help, advice and sharing.
Best way to stop it happening: fix the code to perform appropriate checking.
If you can't fix the code which is actually failing, you could catch the exception explicitly at an "outer" level, log a warning and continue with the next file:
try
{
operationWhichMightThrow();
}
catch (ArrayIndexOutOfBoundsException e)
{
log.warning("Failed file " + filename, e);
// Do whatever you need to continue to the next file.
}
Catch the exception and log it as a test failure.