vaadin / vaadin-text-field / 3080

96%

push

travis-ci

fix: use flattened nodes on helper slot (#477)

A 3rd custom element using `vaadin-text-field` and defining a slot
area for the `vaadin-text-field`'s helper slot was making
`vaadin-text-field` see the slot element as a slotted contend and
setting `has-helper="slotted"` to itself.

This change uses flattened nodes to check the presence of slotted
elements on `vaadin-text-field` `helper` slot.

In this change
- use `.assignedNodes({flatten: true})` to get slotted children
- apply changes to tests
- remove checks for unsupported types

285 of 300 branches covered (95.0%)

Branch coverage included in aggregate %.

437 of 440 relevant lines covered (99.32%)

5152.54 hits per line