From 40429c8377dbc528d8ba3f468bfdd7d3f26fa184 Mon Sep 17 00:00:00 2001
From: Pierre-Yves Gerardy <py@py.gy>
Date: Tue, 30 May 2017 14:17:46 +0200
Subject: [PATCH] Pass namespace when creating new elements while updating a
 keyed list, fix #1820

---
 render/render.js            |  2 +-
 render/tests/test-render.js | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/render/render.js b/render/render.js
index de1766b3..f143df72 100644
--- a/render/render.js
+++ b/render/render.js
@@ -224,7 +224,7 @@ module.exports = function($window) {
 							if (movable.dom != null) nextSibling = movable.dom
 						}
 						else {
-							var dom = createNode(parent, v, hooks, undefined, nextSibling)
+							var dom = createNode(parent, v, hooks, ns, nextSibling)
 							nextSibling = dom
 						}
 					}
diff --git a/render/tests/test-render.js b/render/tests/test-render.js
index 92bcd93c..5ffecf02 100644
--- a/render/tests/test-render.js
+++ b/render/tests/test-render.js
@@ -271,4 +271,26 @@ o.spec("render", function() {
 		o(updateA.callCount).equals(2)
 		o(removeA.callCount).equals(1)
 	})
+	o("svg namespace is preserved in keyed diff (#1820)", function(){
+		// note that this only exerciese one branch of the keyed diff algo
+		var svg = {tag:"svg", children: [
+			{tag:"g", key: 0},
+			{tag:"g", key: 1}
+		]}
+		render(root, [svg])
+
+		o(svg.dom.namespaceURI).equals("http://www.w3.org/2000/svg")
+		o(svg.dom.childNodes[0].namespaceURI).equals("http://www.w3.org/2000/svg")
+		o(svg.dom.childNodes[1].namespaceURI).equals("http://www.w3.org/2000/svg")
+
+		svg = {tag:"svg", children: [
+			{tag:"g", key: 1, attrs: {x: 1}},
+			{tag:"g", key: 2, attrs: {x: 2}}
+		]}
+		render(root, [svg])
+
+		o(svg.dom.namespaceURI).equals("http://www.w3.org/2000/svg")
+		o(svg.dom.childNodes[0].namespaceURI).equals("http://www.w3.org/2000/svg")
+		o(svg.dom.childNodes[1].namespaceURI).equals("http://www.w3.org/2000/svg")
+	})
 })