NullPointerException when trying to resolve Junit5 consumer test class ctor params

[iekdosha]

Scenario:

Using au.com.dius.pact.consumer:junit5 version 4.4.4

//Relevant consumer tests annotations
public class MyTestClass {

  @RegisterExtension
  static final TestDependencyResolver resolverExt = new TestDependencyResolver(/*...*/);
  
  private final TestDependency dependency;

  public MyTestClass(TestDependency dependency) {
    this.dependency = dependency;
  }

  @TestTemplate
  @ExtendWith(PactVerificationInvocationContextProvider.class)
  void test() {
    //...
  }
}

Error message:

Caused by: java.lang.NullPointerException: null cannot be cast to non-null type au.com.dius.pact.provider.junit5.PactVerificationContext
	at au.com.dius.pact.provider.junit5.PactVerificationExtension.supportsParameter(PactVerificationExtension.kt:73)
	at org.junit.jupiter.engine.execution.ParameterResolutionUtils.lambda$resolveParameter$0(ParameterResolutionUtils.java:114)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:178)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:310)
	at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at org.junit.jupiter.engine.execution.ParameterResolutionUtils.resolveParameter(ParameterResolutionUtils.java:115)

The issue seems to be in the method supportsParameter when trying to get verification context from the store: store.get("interactionContext") as PactVerificationContext.
This gets called before creation of the test object so beforeEach lifecycle which inits "interactionContext" is not called yet, leading to a null value which failed to be casted into PactVerificationContext.

[github-actions]

👋 Thanks, this ticket has been added to the PactFlow team's backlog as PACT-758

[rholshausen]

4.4.7 released