From a424d2ff172aa3be9eb5155e732e6f61915d7b5e Mon Sep 17 00:00:00 2001
From: Gary Gregory <garydgregory@gmail.com>
Date: Thu, 8 Nov 2018 12:00:23 -0700
Subject: [PATCH] [COLLECTIONS-701] SetUniqueList.add() crashes due to infinite
 recursion.

Add tests.
---
 .../collections4/list/Collections701Test.java | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 src/test/java/org/apache/commons/collections4/list/Collections701Test.java

diff --git a/src/test/java/org/apache/commons/collections4/list/Collections701Test.java b/src/test/java/org/apache/commons/collections4/list/Collections701Test.java
new file mode 100644
index 000000000..f0b92f78a
--- /dev/null
+++ b/src/test/java/org/apache/commons/collections4/list/Collections701Test.java
@@ -0,0 +1,42 @@
+package org.apache.commons.collections4.list;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+/**
+ * Tests for COLLECTIONS-701.
+ */
+public class Collections701Test {
+
+    @Test
+    public void testArrayList() {
+        final List<Object> list = new ArrayList<>();
+        list.add(list);
+        Assert.assertEquals(1, list.size());
+        Assert.assertEquals(list, list.get(0));
+    }
+
+    @Test
+    public void testHashSet() {
+        final Set<Object> set = new HashSet<>();
+        set.add(set);
+        Assert.assertEquals(1, set.size());
+        Assert.assertEquals(set, set.iterator().next());
+    }
+
+    @Test
+    @Ignore
+    public void testSetUniqueList() {
+        final List<Object> source = new ArrayList<>();
+        final List<Object> list = SetUniqueList.setUniqueList(source);
+        list.add(list);
+        Assert.assertEquals(1, list.size());
+        Assert.assertEquals(list, list.get(0));
+    }
+}