| Tests for setting a negative tabindex on shadow host. Elements inside such a shadow tree should not be in the sequential navigation order. |
| To manually test, press tab key four times. It should traverse focusable elements in the increasing numerical order. |
| |
| 1. First sequentially focusable element outside shadow trees |
| 2. Shadow host with a positive tabindex |
| 3. Focusable element inside a shadow host with a positive tabindex |
| 4.1. Focusable element inside a shadow host with no tabindex |
| 4.2. Shadow host with no tabindex |
| 5. Last sequentially focusable element outside shadow trees |
| 4.1. Focusable element inside a shadow host with no tabindex |
| 4.2. Shadow host with no tabindex |
| 3. Focusable element inside a shadow host with a positive tabindex |
| 2. Shadow host with a positive tabindex |
| 1. First sequentially focusable element outside shadow trees |
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