Re: Re:[rules-users] JUnit testing

Sorry to ask question and then figure it out! I just substituted the actual name of my suite class instead of saying this.class and it works beautifully. I am now testing Drools with JUnit 4 with no problems, after nearly six months! THANK YOU. - Mike Mike Dean wrote: > > Thanks to both of you for pursuing this problem. I have worked around it > by putting my business classes and rules in a separate Drools project, > testing everything there, and then copying them to my RCP. I look forward > to a better solution! > > I must confess Java ignorance, but I use a test suite and try to > instantiate the engine once and then run a series of tests. My crash > occurs before I get to the individual tests. However, the setUp routine > is static, and your code work around cannot be executed in a static > context. Where exactly to you put the test for a null classloader? > > Thanks again. I thought this issue simply died. > > > Marcus Ilgner wrote: >> >> 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 >> >> > > -- View this message in context: http://www.nabble.com/Re%3AJUnit-testing-tp14164710p17331006.html Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users