This test setting a value clears suggested value.

After setting suggestedValue:
| <input>
|   id="test"
|   type="text"
|   value="initial value"
|   this.value="initial value"
|   <shadow:root>
|     <div>
|       id="placeholder"
|       pseudo="-webkit-input-suggested"
|       style="display: none !important;"
|       shadow:pseudoId="-webkit-input-suggested"
|       "suggested value"
|     <div>
|       id="inner-editor"
| "input.value: initial value"
| "internals.suggestedValue(input): suggested value"
| "input.selectionStart: 0"
| "input.selectionEnd: 0"
| "textarea.value: initial value"
| "internals.suggestedValue(textarea): suggested value"
| "select.value: "
| "internals.suggestedValue(select): TX"

After setting value:
| <input>
|   id="test"
|   type="text"
|   value="initial value"
|   this.value="new value"
|   <shadow:root>
|     <div>
|       id="inner-editor"
|       "new value"
| "input.value: new value"
| "internals.suggestedValue(input): "
| "input.selectionStart: 9"
| "input.selectionEnd: 9"
| "textarea.value: new value"
| "internals.suggestedValue(textarea): "
| "select.value: CA"
| "internals.suggestedValue(select): "
| "PASS"