From 012cf7cdbf2edec419f58b4bb0533a2771e515de Mon Sep 17 00:00:00 2001
From: Paul Campbell <pcampbell@kemitix.net>
Date: Tue, 20 Sep 2016 23:35:55 +0100
Subject: [PATCH] ImmutableNodeItemTest: add test for Nodes::asImmutable for
 non-root

---
 .../java/net/kemitix/node/ImmutableNodeItemTest.java     | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/test/java/net/kemitix/node/ImmutableNodeItemTest.java b/src/test/java/net/kemitix/node/ImmutableNodeItemTest.java
index 411e9e5..3997ef3 100644
--- a/src/test/java/net/kemitix/node/ImmutableNodeItemTest.java
+++ b/src/test/java/net/kemitix/node/ImmutableNodeItemTest.java
@@ -418,4 +418,13 @@ public class ImmutableNodeItemTest {
         //when
         immutableNode.insertInPath(null, "");
     }
+
+    @Test
+    public void AsImmutableShouldThrowIAEWhenNotRoot() {
+        //given
+        exception.expect(IllegalArgumentException.class);
+        exception.expectMessage("source must be the root node");
+        //when
+        Nodes.asImmutable(Nodes.unnamedChild("child", Nodes.unnamedRoot("root")));
+    }
 }