From 8169ac02f1e147dbf62fb07158753026acba9b52 Mon Sep 17 00:00:00 2001
From: Szymon Sasin <szymon.sasin@gmail.com>
Date: Wed, 10 Jul 2024 19:49:40 +0300
Subject: [PATCH] wip

---
 .../coap/transport/TransportContextTest.java    | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/coap-core/src/test/java/com/mbed/coap/transport/TransportContextTest.java b/coap-core/src/test/java/com/mbed/coap/transport/TransportContextTest.java
index 322807ee..77a7de6c 100644
--- a/coap-core/src/test/java/com/mbed/coap/transport/TransportContextTest.java
+++ b/coap-core/src/test/java/com/mbed/coap/transport/TransportContextTest.java
@@ -90,6 +90,23 @@ void listKeys() {
         assertThrows(NoSuchElementException.class, iterator::next);
     }
 
+    @Test
+    void listKeys_overwrite_merge() {
+        TransportContext ctx1 = TransportContext.of(DUMMY_KEY, "111").with(DUMMY_KEY2, "222").with(DUMMY_KEY, "aaa");
+
+        Iterator<TransportContext.Key<?>> iterator = ctx1.iterator();
+
+        assertTrue(iterator.hasNext());
+        assertEquals(DUMMY_KEY, iterator.next());
+
+        assertTrue(iterator.hasNext());
+        assertEquals(DUMMY_KEY2, iterator.next());
+
+        // TODO: fix this
+        assertFalse(iterator.hasNext());
+        assertThrows(NoSuchElementException.class, iterator::next);
+    }
+
     @Test
     void empty() {
         TransportContext trans = EMPTY;