fix: PactVerificationExtension will fail when used with other extensi…

…ons in a static context #1666

provider/junit5/src/main/kotlin/au/com/dius/pact/provider/junit5/PactVerificationExtension.kt

@@ -73,14 +73,14 @@ open class PactVerificationExtension(
 
   override fun supportsParameter(parameterContext: ParameterContext, extensionContext: ExtensionContext): Boolean {
     val store = extensionContext.getStore(ExtensionContext.Namespace.create("pact-jvm"))
-    val testContext = store.get("interactionContext") as PactVerificationContext
+    val testContext = store.get("interactionContext") as PactVerificationContext?
     return when (parameterContext.parameter.type) {
       Pact::class.java -> true
       Interaction::class.java -> true
-      ClassicHttpRequest::class.java, HttpRequest::class.java -> testContext.target is HttpTestTarget
+      ClassicHttpRequest::class.java, HttpRequest::class.java -> testContext?.target is HttpTestTarget
       PactVerificationContext::class.java -> true
       ProviderVerifier::class.java -> true
-      RequestData::class.java -> testContext.target is PluginTestTarget
+      RequestData::class.java -> testContext?.target is PluginTestTarget
       else -> false
     }
   }

provider/junit5/src/test/java/au/com/dius/pact/provider/junit5/WithRegisteredExtensionTest.java

@@ -0,0 +1,63 @@
+package au.com.dius.pact.provider.junit5;
+
+import au.com.dius.pact.provider.junitsupport.Provider;
+import au.com.dius.pact.provider.junitsupport.State;
+import au.com.dius.pact.provider.junitsupport.loader.PactFolder;
+import org.junit.jupiter.api.extension.Extension;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.api.extension.ParameterResolutionException;
+import org.junit.jupiter.api.extension.ParameterResolver;
+import org.junit.jupiter.api.extension.RegisterExtension;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.junit.jupiter.api.TestTemplate;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+
+@Provider("myAwesomeService")
+@PactFolder("pacts")
+public class WithRegisteredExtensionTest {
+  private static final Logger LOGGER = LoggerFactory.getLogger(WithRegisteredExtensionTest.class);
+
+  @RegisterExtension
+  static final TestDependencyResolver resolverExt = new TestDependencyResolver(/*...*/);
+
+  private final TestDependency dependency;
+
+  public WithRegisteredExtensionTest(TestDependency dependency) {
+    this.dependency = dependency;
+  }
+
+  @TestTemplate
+  @ExtendWith(PactVerificationInvocationContextProvider.class)
+  void test() {
+    assertThat(dependency, is(notNullValue()));
+  }
+
+  @State("state 2")
+  void state2() {
+  }
+
+  @State("default")
+  void stateDefault() {
+  }
+
+  static class TestDependencyResolver implements Extension, ParameterResolver {
+    @Override
+    public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+      return parameterContext.getParameter().getType().isAssignableFrom(TestDependency.class);
+    }
+
+    @Override
+    public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+      return new TestDependency();
+    }
+  }
+
+  static class TestDependency {
+  }
+}