Add a test case for bug 659109

third_party/WebKit/LayoutTests/editing/inserting/insert-space.html

Index: third_party/WebKit/LayoutTests/editing/inserting/insert-space.html
diff --git a/third_party/WebKit/LayoutTests/editing/inserting/insert-space.html b/third_party/WebKit/LayoutTests/editing/inserting/insert-space.html
index f48cd44b7aba646402334cf283cafd2a74dbb39c..10c9f072b19a8cd43e3e8a865aeb3cae51cc72f7 100644
--- a/third_party/WebKit/LayoutTests/editing/inserting/insert-space.html
+++ b/third_party/WebKit/LayoutTests/editing/inserting/insert-space.html
@@ -47,4 +47,16 @@ test(() => assert_selection(
   },
   '<div contenteditable><p id="para">A\u00A0| B</p></div>'),
   'Insert a &nbsp; instead of plain space when it is inserted before the text node that has a leading plain space');
+
+test(() => assert_selection(
+  '<div contenteditable id="editor"><br> </div>',
+  selection => {
+    var editor = selection.document.getElementById('editor');

[yosin_UTC9, 2016/10/28 06:13:50]

We don't need to have id="editor", you can write as
<div contenteditable>|<br> </div>

[joone, 2016/10/28 18:20:16]

Done.

+    selection.collapse(editor.firstChild, 0);
+    selection.document.execCommand('insertText', false, ' ');
+    selection.document.execCommand('insertText', false, ' ');
+    selection.document.execCommand('insertText', false, ' ');
+  },
+  '<div contenteditable id="editor">\u00A0 \u00A0| </div>'),
+  'Insert spaces into the editable <div> that only has <br> and space as child');
 </script>