[LANG-1524] TypeUtils.toString(Type) StackOverflowError for an inner

class in the inner class parameterized enclosing class #657

1 files changed, 17 insertions, 0 deletions

diff --git a/src/test/java/org/apache/commons/lang3/reflect/TypeUtilsTest.java b/src/test/java/org/apache/commons/lang3/reflect/TypeUtilsTest.java
index ce5051413..dca2096b5 100644
--- a/src/test/java/org/apache/commons/lang3/reflect/TypeUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/reflect/TypeUtilsTest.java
@@ -56,6 +56,16 @@ import org.apache.commons.lang3.reflect.testbed.StringParameterizedChild;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
+/**
+ * Test fixture for https://issues.apache.org/jira/browse/LANG-1524
+ */
+class AAAAClass<T extends AAAAClass.BBBBClass.CCCClass> {
+    public static class BBBBClass {
+        public static class CCCClass {
+        }
+    }
+}
+
 final class AAAClass extends AAClass<String> {
     public class BBBClass extends BBClass<String> {
         // empty
@@ -261,6 +271,13 @@ public class TypeUtilsTest<B> extends AbstractLangTest {
         assertEquals("T extends java.lang.Enum<T>", TypeUtils.toString(method.getGenericReturnType()));
     }
 
+    @Test
+    public void test_LANG_1524() {
+        assertEquals("AAAAClass(cycle).BBBBClass.CCCClass", TypeUtils.toString(AAAAClass.BBBBClass.CCCClass.class));
+        assertEquals("AAAAClass(cycle).BBBBClass", TypeUtils.toString(AAAAClass.BBBBClass.class));
+        assertEquals("AAAAClass(cycle)", TypeUtils.toString(AAAAClass.class));
+    }
+
     /**
      * <pre>{@code
      * java.lang.StackOverflowError