Support test execution order for JUnit 5

[anatoliy-balakirev]

Test execution order is available in Junit 5 since version 5.4 and seems to be stable enough to start supporting it by the PIT (ordered Junit 4 tests are already supported).

Here is a sample repo: https://github.com/anatoliy-balakirev/pitest_ordered_tests
There you can find two tests:

• pitest.sample.controller.SampleControllerTest - junit 5
• pitest.sample.controller.SampleControllerJunit4Test - junit 4

If you switch to junit4 branch there (or just remove testPlugin = "junit5" from the build.gradle) and run pitest - tests are executed properly, everything is green. If you try to execute pitest with Junit 5 (default in master) - tests are failed with:

14:10:30 PIT >> INFO : MINION : 14:10:30 PIT >> SEVERE : Description [testClass=pitest.sample.controller.SampleControllerTest, name=validate_2_internalError()]
org.opentest4j.AssertionFailedError: 
Expecting:
 <204>
to be equal to:
 <500>
but was not.
	at java.base/jdk.internal.reflect.N
14:10:30 PIT >> INFO : MINION : ativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(De
14:10:30 PIT >> INFO : MINION : legatingConstructorAccessorImpl.java:45)
	at pitest.sample.controller.SampleControllerTest.validate_2_internalError(SampleControllerTest.java:59)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.
14:10:30 PIT >> INFO : MINION : reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.ju
14:10:30 PIT >> INFO : MINION : nit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:515)
	at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestM
14:10:30 PIT >> INFO : MINION : ethod$6(TestMethodTestDescriptor.java:171)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.
14:10:30 PIT >> INFO : MINION : java:167)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:114)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:59)
	at org.junit.platform.engine.s
14:10:30 PIT >> INFO : MINION : upport.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:105)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.ex
14:10:30 PIT >> INFO : MINION : ecuteRecursively(NodeTestTask.java:95)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:71)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
	at org.junit.platform.engine.support.hierarchical.SameThrea
14:10:30 PIT >> INFO : MINION : dHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:110)
	at org.junit.platform.engine.support.hierarchi
14:10:30 PIT >> INFO : MINION : cal.ThrowableCollector.execute(ThrowableCollector.java:72)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:95)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:71
14:10:30 PIT >> INFO : MINION : )
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
	at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
	at org.junit.platform.engine.support
14:10:30 PIT >> INFO : MINION : .hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:110)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeR
14:10:30 PIT >> INFO : MINION : ecursively(NodeTestTask.java:95)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:71)
	at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExe
14:10:30 PIT >> INFO : MINION : cutorService.java:32)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
	a
14:10:30 PIT >> INFO : MINION : t org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
	at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188)
	at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams
14:10:30 PIT >> INFO : MINION : (DefaultLauncher.java:202)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
	at org.pitest.junit5.JUnit5TestUnit.execute(JUnit5Test
14:10:30 PIT >> INFO : MINION : Unit.java:95)
	at org.pitest.coverage.execute.CoverageDecorator.execute(CoverageDecorator.java:50)
	at org.pitest.testapi.execute.containers.UnContainer.execute(UnContainer.java:31)
	at org.pitest.testapi.execute.Pitest.executeTests(Pitest.java:57)
	at org
14:10:30 PIT >> INFO : MINION : .pitest.testapi.execute.Pitest.run(Pitest.java:48)
	at org.pitest.coverage.execute.CoverageWorker.run(CoverageWorker.java:51)
	at org.pitest.coverage.execute.CoverageMinion.main(CoverageMinion.java:90)

14:10:30 PIT >> SEVERE : Description [testClass=pitest.sample.controller.SampleControllerTest, name=validate_2_internalError()] did not pass without mutation.
14:10:30 PIT >> FINE : Coverage generator Minion exited ok
14:10:30 PIT >> INFO : Calculated coverage in 2 seconds.
14:10:30 PIT >> SEVERE : Tests failing without mutation: 
Description [testClass=pitest.sample.controller.SampleControllerTest, name=validate_2_internalError()]
Exception in thread "main" org.pitest.help.PitHelpError: 1 tests did not pass without mutation when calculating line coverage. Mutation testing requires a green suite.
See http://pitest.org for more details.
	at org.pitest.coverage.execute.DefaultCoverageGenerator.verifyBuildSuitableForMutationTesting(DefaultCoverageGenerator.java:114)
	at org.pitest.coverage.execute.DefaultCoverageGenerator.calculateCoverage(DefaultCoverageGenerator.java:96)
	at org.pitest.coverage.execute.DefaultCoverageGenerator.calculateCoverage(DefaultCoverageGenerator.java:51)
	at org.pitest.mutationtest.tooling.MutationCoverage.runReport(MutationCoverage.java:115)
	at org.pitest.mutationtest.tooling.EntryPoint.execute(EntryPoint.java:120)
	at org.pitest.mutationtest.tooling.EntryPoint.execute(EntryPoint.java:50)
	at org.pitest.mutationtest.commandline.MutationCoverageReport.runReport(MutationCoverageReport.java:87)
	at org.pitest.mutationtest.commandline.MutationCoverageReport.main(MutationCoverageReport.java:45)

FAILURE: Build failed with an exception.