Restore a collapsed trailing space of text used for line break

third_party/WebKit/LayoutTests/editing/pasteboard/preserve-trailing-space.html

Index: third_party/WebKit/LayoutTests/editing/pasteboard/preserve-trailing-space.html
diff --git a/third_party/WebKit/LayoutTests/editing/pasteboard/preserve-trailing-space.html b/third_party/WebKit/LayoutTests/editing/pasteboard/preserve-trailing-space.html
index a535a0b7227807e0d0406a48abc6df0bd6e16e5e..160aa235b740084a6c6b14632cadfa7462be56bd 100644
--- a/third_party/WebKit/LayoutTests/editing/pasteboard/preserve-trailing-space.html
+++ b/third_party/WebKit/LayoutTests/editing/pasteboard/preserve-trailing-space.html
@@ -4,14 +4,38 @@
 <script src="../assert_selection.js"></script>
 <script>
 test(() => assert_selection(
-  '<div id="copy" style="width: 10em;">^Copy this area <a href="http://foo/">AVeryLongWordThatWillWrap|</a></div><div contenteditable id="editor"></div>',
+  '<div style="width: 10em;">Copy this area <a href="http://foo/">AVeryLongWordThatWillWrap</a></div><div contenteditable>|</div>',
   selection => {
-    var editor = selection.document.getElementById('editor');
+    selection.setClipboardData('Copy this area <a href="http://foo/">AVeryLongWordThatWillWrap</a>');
+    selection.document.execCommand('paste');
+  },
+  '<div style="width: 10em;">Copy this area <a href="http://foo/">AVeryLongWordThatWillWrap</a></div><div contenteditable>Copy this area <a href="http://foo/">AVeryLongWordThatWillWrap|</a></div>'),
+  '1. Restore the collapsed space');
+
+test(() => assert_selection(
+  '<div style="width: 2em;"><b><i>foo </i></b>bar</div><div contenteditable>|</div>',
+  selection => {
+    selection.setClipboardData('<b><i>foo </i></b>bar');
+    selection.document.execCommand('paste');
+  },
+ '<div style="width: 2em;"><b><i>foo </i></b>bar</div><div contenteditable><b><i>foo </i></b>bar|</div>'),
+  '2. Restore the collapsed space');
 
-    selection.document.execCommand('copy');
-    selection.collapse(editor);
+test(() => assert_selection(
+  '<div style="width: 2em;">작은홍띠점박이푸른부전나비</div><div contenteditable>|</div>',
+  selection => {
+    selection.setClipboardData('작은홍띠점박이푸른부전나비');
+    selection.document.execCommand('paste');
+  },
+ '<div style="width: 2em;">작은홍띠점박이푸른부전나비</div><div contenteditable>작은홍띠점박이푸른부전나비|</div>'),
+  '3. Space should not be added for CJK');
+
+test(() => assert_selection(
+  '<div style="width: 2em; word-break: break-all">Pneumonoultramicroscopicsilicovolcanoconiosis</div><div contenteditable>|</div>',
+  selection => {
+    selection.setClipboardData('Pneumonoultramicroscopicsilicovolcanoconiosis');
     selection.document.execCommand('paste');
   },
-  '<div id="copy" style="width: 10em;">Copy this area <a href="http://foo/">AVeryLongWordThatWillWrap</a></div><div contenteditable id="editor">Copy this area\u00A0<a href="http://foo/">AVeryLongWordThatWillWrap|</a></div>'),
-  'Restore the collapsed space');
+ '<div style="width: 2em; word-break: break-all">Pneumonoultramicroscopicsilicovolcanoconiosis</div><div contenteditable>Pneumonoultramicroscopicsilicovolcanoconiosis|</div>'),
+  '4. Space should not be added for CSS word-break: break-all');
 </script>