[Safari] Failing test in plugins/font/font

[Tomasz Jakut]

The test is failing in this suite:

tests/plugins/font/font test apply font size over another font size (collapsed selection in empty span)
there is only one span in the editable
Expected: 1 (number)
Actual:   3 (number)

Safari is creating three new spans instead of one: the desired one, surrounded by two empty ones.

<p>x<em><span style="font-size:24px;"></span><span style="font-size:24px">bar</span><span style="font-size:24px;"></span></em>x</p>

Safari version: 10.0.1

[Tomasz Jakut]

Ignored in ​git:c0e4dc3.

[Marek Lewandowski]

I could reproduce it starting with CKEditor 4.4.7 version, so it seems that it's a feature introduced by recent Safari updates.

[Marek Lewandowski]

The problem is within insertHtml() method which is called internally by editor.insertText( 'bar' ). Basically what happens is that another span{font-size) is created for each selection boundary, so you end up with three spans.

[Marek Lewandowski]

Don't have the time to further investigate it.

[kkrzton]

This is a dup of #16588 (as the cause of this issue is the same, for more details see ​#16588#comment:6).