Re: Re:[rules-users] JUnit testing

Hi Edson, thank you very much for testing this! Since I could not discern any differences between your approach and mine, I decided to resolve the issue manually by inserting a work-around in my test routine which sets the context class loader for the current thread before calling the method under test. if (Thread.currentThread().getContextClassLoader() == null) { Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader()); } My guess is that the custom JUnit 4 class runner (SpringJUnit4ClassRunner) somehow is responsible for the faulty behaviour. Thanks again Marcus On Mon, May 19, 2008 at 3:09 PM, Edson Tirelli <tirelli(a)post.com&gt; wrote: > > All, > > I see that the code in that spot is weak and could be improved. > Although, > using drools 4.0.7, I successfully created a junit 4 test that I paste > bellow. Also, the whole drools code is tested with junit 3 and we have no > problems. For instance, look at our integration tests here: > > http://anonsvn.labs.jboss.com/labs/jbossrules/branches/4.0.x/drools-compi... > > The code I used to create the junit 4 test is based on the default > example create by the drools plugin + the snippet you showed bellow: > > @Test > public void testRuleBase() { > try { > > //load up the rulebase > RuleBase ruleBase = readRule(); > StatefulSession workingMemory = > ruleBase.newStatefulSession(); > > //go ! > Message message = new Message(); > message.setMessage( "Hello World" ); > message.setStatus( Message.HELLO ); > workingMemory.insert( message ); > workingMemory.fireAllRules(); > workingMemory.dispose(); > > } catch (Throwable t) { > t.printStackTrace(); > Assert.fail("Something is wrong: "+t.getMessage()); > } > } > > /** > * Please note that this is the "low level" rule assembly API. > */ > private RuleBase readRule() throws Exception { > //read in the source > Reader source = new InputStreamReader( > DroolsTest.class.getResourceAsStream( "/Sample.drl" ) ); > > PackageBuilderConfiguration conf = new > PackageBuilderConfiguration(); > JavaDialectConfiguration javaConf = (JavaDialectConfiguration) > conf.getDialectConfiguration("java"); > javaConf.setCompiler(JavaDialectConfiguration.ECLIPSE); > javaConf.setJavaLanguageLevel("1.5"); > > PackageBuilder builder = new PackageBuilder( conf ); > builder.addPackageFromDrl( source ); > > RuleBase ruleBase = RuleBaseFactory.newRuleBase(); > ruleBase.addPackage( builder.getPackage() ); > return ruleBase; > } > > Hope it helps, > Edson > > > 2008/5/19 Marcus Ilgner <marcus.ilgner(a)gmail.com&gt;: >> >> Hi list, >> >> I'm reviving this thread because I happen to have the same problem. >> >> On Sun, Mar 23, 2008 at 7:34 PM, Mike Dean <mdean77(a)comcast.net&gt; wrote: >> > >> > Thanks (months later!). I have cut down my code example below to show >> > this >> > issue more clearly: >> > >> > >> > John J. Franey wrote: >> >> >> >> NullPointerException on line 146 means classLoader is null. That is >> >> odd. >> >> I have no idea why the code that gets classLoader won't work in >> >> eclipse's >> >> junit runtime, but does when run in your eclipse plugin. >> >> It seems indeed like during JUnit tests, the context classloader of >> the thread gets not set (null). >> >> The code leading up to the problem is as follows: >> PackageBuilderConfiguration conf = new PackageBuilderConfiguration(); >> JavaDialectConfiguration javaConf = (JavaDialectConfiguration) >> conf.getDialectConfiguration("java"); >> javaConf.setCompiler(JavaDialectConfiguration.ECLIPSE); >> javaConf.setJavaLanguageLevel("1.5"); >> RuleBase ruleBase = RuleBaseFactory.newRuleBase(); >> >> The resulting stacktrace is: >> java.lang.NullPointerException >> at >> org.drools.RuleBaseConfiguration.instantiateClass(RuleBaseConfiguration.java:569) >> at >> org.drools.RuleBaseConfiguration.determineConsequenceExceptionHandler(RuleBaseConfiguration.java:561) >> at >> org.drools.RuleBaseConfiguration.init(RuleBaseConfiguration.java:220) >> at >> org.drools.RuleBaseConfiguration.<init>(RuleBaseConfiguration.java:133) >> at >> org.drools.common.AbstractRuleBase.<init>(AbstractRuleBase.java:147) >> at >> org.drools.reteoo.ReteooRuleBase.<init>(ReteooRuleBase.java:124) >> at >> org.drools.reteoo.ReteooRuleBase.<init>(ReteooRuleBase.java:101) >> at >> org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:57) >> at >> org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:38) >> >> Has anyone set up Drools and JUnit successfully? Maybe we forgot to >> set up the environment properly? >> >> Best regards >> Marcus _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users