jgiven report fails when running testng dataproviders in parallel mode

[adrian-herscu]

Given the following scenario:

@Test(enabled = false, dataProvider = "dummyData", dataProviderClass = SelfTestsData.class)
public void shouldTestInParallel(final String left, final String right)
        throws Exception {
    given().nothing();
    when().doing_nothing();
    then().$("left should be equal to right", stage -> { //$NON-NLS-1$
                assertThat(left).isEqualTo(right);
            });
}

and the following data provider:
@dataProvider(parallel = true)
public static Object[][] dummyData() {
// NOTE: could be populated from a CSV file
return new Object[][] {
{ "one", "one" },
{ "two", "two" }
};
}

When running with TestNG

Then the following stacktrace appears:

Exception in thread "main" java.lang.NullPointerException
at com.tngtech.jgiven.report.model.ReportModelBuilder.setSuccess(ReportModelBuilder.java:247)
at com.tngtech.jgiven.report.model.ReportModelBuilder.scenarioFailed(ReportModelBuilder.java:279)
at com.tngtech.jgiven.impl.StandaloneScenarioExecutor.failed(StandaloneScenarioExecutor.java:413)
at com.tngtech.jgiven.testng.ScenarioTestListener.onTestFailure(ScenarioTestListener.java:58)
at org.testng.internal.Invoker.runTestListeners(Invoker.java:1895)
at org.testng.internal.Invoker.runTestListeners(Invoker.java:1879)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1292)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
at org.testng.TestNG.run(TestNG.java:1057)

[janschaefer]

Interesting. I never actually tried that. I classify that as a feature request :-)

[janschaefer]

This is now tracked by PR #108 (not finished yet)