vaadin-framework/uitest/src/com/vaadin/tests/declarative/PotusForm.html

<v-vertical-layout _id="form" spacing margin>
    <v-horizontal-layout spacing>   
        <v-text-field _id="firstName" caption="First Name" null-representation="" width="300px" />
        <v-text-field _id="lastName" caption="Last Name" null-representation="" width="300px" />
    </v-horizontal-layout>
    <v-horizontal-layout spacing>   
        <v-combo-box _id="party" caption="Party" width="300px" />
        <v-popup-date-field _id="tookOffice" caption="Took Office" />
        <v-popup-date-field _id="leftOffice" caption="Left Office" />
    </v-horizontal-layout>
    <v-horizontal-layout spacing width-full>  
        <v-button _id="save" style-name="primary">Save</v-button>
        <v-button _id="revert">Revert</v-button>
        <v-button _id="delete" style-name="danger" :expand :right>Delete</v-button>
    </v-horizontal-layout>
</v-vertical-layout>