Work around java sdk issue 1973 (#413)

Work around java sdk issue 1973

features/update/task_failure/feature.java

@@ -11,6 +11,7 @@
 import io.temporal.workflow.UpdateMethod;
 import io.temporal.workflow.UpdateValidatorMethod;
 import io.temporal.workflow.Workflow;
+import java.util.concurrent.ExecutionException;
 import java.util.concurrent.atomic.AtomicInteger;
 import org.junit.jupiter.api.Assertions;
 
@@ -78,6 +79,18 @@ public Run execute(Runner runner) {
         Assertions.assertEquals("Failure", ((ApplicationFailure) e.getCause()).getType());
         Assertions.assertEquals(
             "message='simulated 3', type='Failure', nonRetryable=false", e.getCause().getMessage());
+      } catch (RuntimeException e) {
+        // TODO(https://github.com/temporalio/sdk-java/issues/1973) The SDK should be unwrapping the
+        // ExecutionException.
+        Assertions.assertTrue(e.getCause() instanceof ExecutionException);
+        ExecutionException ee = (ExecutionException) e.getCause();
+        Assertions.assertTrue(ee.getCause() instanceof WorkflowUpdateException);
+        WorkflowUpdateException wue = (WorkflowUpdateException) ee.getCause();
+        Assertions.assertTrue(wue.getCause() instanceof ApplicationFailure);
+        Assertions.assertEquals("Failure", ((ApplicationFailure) wue.getCause()).getType());
+        Assertions.assertEquals(
+            "message='simulated 3', type='Failure', nonRetryable=false",
+            wue.getCause().getMessage());
       }
 
       // Check an update handle validator will fail on any exception