com.github.mvysny.kaributesting.v10.FormLayoutUtils.kt Maven / Gradle / Ivy

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Karibu Testing, support for browserless Vaadin testing in Kotlin

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package com.github.mvysny.kaributesting.v10

import com.vaadin.flow.component.Component
import com.vaadin.flow.component.formlayout.FormLayout
import java.lang.IllegalStateException
import kotlin.streams.toList

/**
 * Returns the single field nested in this form item. Fails if there are no
 * child components or if there are too many of them. Automatically skips
 * components placed in the `label` slot (see [FormLayout.FormItem.addToLabel]
 * for more details).
 */
public val FormLayout.FormItem.field: Component get() {
    val fields: List = children.toList().filter { it.element.getAttribute("slot") != "label" }
    if (fields.size != 1) {
        throw IllegalStateException("FormItem: Expected 1 field but got ${fields.size}. Component tree:\n${toPrettyTree()}")
    }
    return fields[0]
}