1 files changed, 17 insertions, 0 deletions
diff --git a/java/java-tests/testData/inspection/dataFlow/fixture/RootThrowableCause.java b/java/java-tests/testData/inspection/dataFlow/fixture/RootThrowableCause.java
index 6086c92b40d4..1197fe817e8e 100644
--- a/java/java-tests/testData/inspection/dataFlow/fixture/RootThrowableCause.java
+++ b/java/java-tests/testData/inspection/dataFlow/fixture/RootThrowableCause.java
@@ -1,3 +1,6 @@
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.Nullable;
+
 class Doo {
 
   void foo(Throwable e) {
@@ -9,4 +12,18 @@ class Doo {
     }
   }
 
+}
+
+abstract class Test04 {
+  @Nullable
+  @Contract(pure = true)
+  abstract Test04 getParent();
+
+  Test04 getTopParent() {
+    Test04 top = this;
+    while (top.getParent() != null) {
+      top = top.getParent();
+    }
+    return top;
+  }
 }
 \ No newline at end of file