Verify the iteration is given to specification context

spock-core/src/main/java/org/spockframework/runtime/PlatformSpecRunner.java

@@ -255,6 +255,7 @@ void runParameterizedFeature(SpockExecutionContext context, ParameterizedFeature
 
   void runInitializer(SpockExecutionContext context) {
     getSpecificationContext(context).setCurrentFeature(context.getCurrentFeature());
+    getSpecificationContext(context).setCurrentIteration(context.getCurrentIteration());
     runInitializer(context, context.getSpec());
   }
 

spock-core/src/main/java/org/spockframework/runtime/SpecificationContext.java

@@ -50,7 +50,7 @@ public void setCurrentFeature(FeatureInfo currentFeature) {
   @Override
   public IterationInfo getCurrentIteration() {
     if (currentIteration == null) {
-      throw new IllegalStateException("Cannot request current iteration in @Shared context");
+      throw new IllegalStateException("Cannot request current iteration in @Shared context, or feature context");
     }
     return currentIteration;
   }

spock-specs/src/test/groovy/org/spockframework/smoke/Interceptors.groovy

@@ -246,6 +246,12 @@ class FooSpec extends Specification {
           } catch (IllegalStateException ise) {
             assert ise.message == 'Cannot request current feature in @Shared context'
           }
+          try {
+            currentIteration
+            assert false: 'currentIteration should not be set'
+          } catch (IllegalStateException ise) {
+            assert ise.message == 'Cannot request current iteration in @Shared context, or feature context'
+          }
         }
       }
     }
@@ -268,6 +274,12 @@ class FooSpec extends Specification {
           } catch (IllegalStateException ise) {
             assert ise.message == 'Cannot request current feature in @Shared context'
           }
+          try {
+            currentIteration
+            assert false: 'currentIteration should not be set'
+          } catch (IllegalStateException ise) {
+            assert ise.message == 'Cannot request current iteration in @Shared context, or feature context'
+          }
         }
       }
     }
@@ -285,6 +297,12 @@ class FooSpec extends Specification {
         instance.specificationContext.with {
           assert currentSpec
           assert currentFeature
+          try {
+            currentIteration
+            assert false: 'currentIteration should not be set'
+          } catch (IllegalStateException ise) {
+            assert ise.message == 'Cannot request current iteration in @Shared context, or feature context'
+          }
         }
       }
     }
@@ -302,6 +320,7 @@ class FooSpec extends Specification {
         instance.specificationContext.with {
           assert currentSpec
           assert currentFeature
+          assert currentIteration
         }
       }
     }
@@ -319,6 +338,7 @@ class FooSpec extends Specification {
         instance.specificationContext.with {
           assert currentSpec
           assert currentFeature
+          assert currentIteration
         }
       }
     }