Bug 1665550 - part 2: Rewrite `test_dragdrop.html` with IIEF r=m_kato

With IIEF, we can guarantee each test block isolated. So, without declaring semi-global variables a lot for all tests, developers can comment out every tests to debug only one thing. Differential Revision: https://phabricator.services.mozilla.com/D119486
2021-07-14 01:20:19 +00:00 · 2021-07-14 01:20:19 +00:00 · e577d75b11
--- a/editor/libeditor/tests/test_dragdrop.html
+++ b/editor/libeditor/tests/test_dragdrop.html