fix: JUnit 5 test provider now throws an exception if there are no Pacts to verify #1007

Author: Ronald Holshausen

provider/pact-jvm-provider-junit5/src/main/kotlin/au/com/dius/pact/provider/junit5/PactJUnit5VerificationProvider.kt

@@ -380,6 +380,11 @@ class PactVerificationInvocationContextProvider : TestTemplateInvocationContextP
     val tests = pactSources.flatMap { pact ->
       pact.first.interactions.map { PactVerificationExtension(pact.first, pact.second, it, serviceName, consumerName) }
     }
+
+    if (tests.isEmpty()) {
+      throw UnsupportedOperationException("No Pact files where found to verify")
+    }
+
     return tests.stream() as Stream<TestTemplateInvocationContext>
   }
 

provider/pact-jvm-provider-junit5/src/test/groovy/au/com/dius/pact/provider/junit5/PactVerificationInvocationContextProviderSpec.groovy

@@ -1,6 +1,7 @@
 package au.com.dius.pact.provider.junit5
 
 import au.com.dius.pact.core.model.Pact
+import au.com.dius.pact.provider.junit.Consumer
 import au.com.dius.pact.provider.junit.Provider
 import au.com.dius.pact.provider.junit.State
 import au.com.dius.pact.provider.junit.loader.PactFilter
@@ -11,6 +12,7 @@ import au.com.dius.pact.provider.junit.loader.PactSource
 import au.com.dius.pact.provider.junit.target.Target
 import au.com.dius.pact.provider.junit.target.TestTarget
 import org.junit.jupiter.api.extension.ExtensionContext
+import spock.lang.Issue
 import spock.lang.Specification
 import spock.lang.Unroll
 
@@ -30,6 +32,14 @@ class PactVerificationInvocationContextProviderSpec extends Specification {
 
   }
 
+  @Provider('myAwesomeService')
+  @Consumer('doesNotExist')
+  @PactFolder('pacts')
+  static class TestClassWithNoPacts {
+    @TestTarget
+    Target target
+  }
+
   static class InvalidStateChangeTestClass {
 
     @State('one')
@@ -148,6 +158,18 @@ class PactVerificationInvocationContextProviderSpec extends Specification {
     extensions.count() == 1
   }
 
+  @Issue('#1007')
+  def 'provideTestTemplateInvocationContexts throws an exception if there are no pacts to verify'() {
+    when:
+    provider.provideTestTemplateInvocationContexts(['getTestClass': {
+      Optional.of(TestClassWithNoPacts)
+    } ] as ExtensionContext)
+
+    then:
+    def exp = thrown(UnsupportedOperationException)
+    exp.message == 'No Pact files where found to verify'
+  }
+
   @Unroll
   def 'throws an exception if there are invalid state change methods'() {
     when: