Can't use -Dtest from root in a reactor build
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Key: SUREFIRE-406
URL: http://jira.codehaus.org/browse/SUREFIRE-406
Project: Maven Surefire
Issue Type: Bug
Affects Versions: 2.4
Reporter: Dan Fabulich
Fix For: 2.x
SUREFIRE-350 suggests that "if test parameter is provided, and no match is
found, an error should occur, not a successful build with 0 tests." That made
sense to me, so I checked in a fix in revision 597952.
However, I discovered that this broke a certain maybe-standard usage: if you've
got a parent aggregator POM and two children "foo" and "bar" running in a
reactor, you used to be able to say -Dtest=BarTest; we'd compile foo and run no
tests in foo, then run BarTest in bar.
This usage very convenient, because you don't have to know that BarTest is in
the bar module; you can just kick off the tests from the root module and run
them in whatever module happens to contain them. You could also run multiple
individual tests separated by commas in multiple projects.
Now, if you try to run that line from the parent, you'll get a build failure in
foo, because BarTest isn't defined in foo.
I can think of a number of different possible options here.
1) Leave the code as is. Just because it's convenient doesn't mean it's
important and we have to preserve it.
2) Go back and "unfix" SUREFIRE-350.
Notably, in order to fix SUREFIRE-350, I added a new plugin parameter called
failIfNoTests, which would fail if no tests were run. (It seemed imaginable
that somebody would want to turn that on in a variety of cases, not just in the
-Dtest case.)
If I were to unfix SUREFIRE-350 it'd still be possible to get a build failure,
if you wanted one really badly, by saying "mvn test -Dtest=FooTest
-DfailIfNoTests=true".
It's not pretty, but perhaps it's an acceptable compromise.
3) Try to add code that detects the reactor case and handles it. I think it's
not that hard to detect whether a given invocation of SurefirePlugin is running
in a reactor (though I don't actually know how off-hand). But how could I
detect the case that this is meant to help, where you accidentally had a typo?
There's no way to detect whether a test got run *at some point* in the reactor,
is there?
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