| /* |
| * Copyright 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.ui.core.layout |
| |
| import androidx.test.filters.SmallTest |
| import androidx.ui.core.Constraints |
| import androidx.ui.core.ExperimentalLayoutNodeApi |
| import androidx.ui.core.LayoutDirection |
| import androidx.ui.core.LayoutNode |
| import androidx.ui.core.Measurable |
| import androidx.ui.core.MeasureScope |
| import com.google.common.truth.Truth.assertThat |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| |
| @SmallTest |
| @RunWith(JUnit4::class) |
| class PlacedChildTest { |
| |
| @Test |
| @OptIn(ExperimentalLayoutNodeApi::class) |
| fun remeasureNotPlacedChild() { |
| val root = root { |
| measureBlocks = UseChildSizeButNotPlace |
| add(node { |
| wrapChildren = true |
| add(node { |
| size = 10 |
| }) |
| }) |
| } |
| |
| val delegate = createDelegate(root) |
| |
| assertThat(root.height).isEqualTo(10) |
| |
| val childWithSize = root.first.first |
| childWithSize.size = 20 |
| childWithSize.requestRemeasure() |
| delegate.measureAndLayout() |
| |
| assertThat(root.height).isEqualTo(20) |
| } |
| } |
| |
| @OptIn(ExperimentalLayoutNodeApi::class) |
| private val UseChildSizeButNotPlace = object : LayoutNode.NoIntrinsicsMeasureBlocks("") { |
| override fun measure( |
| measureScope: MeasureScope, |
| measurables: List<Measurable>, |
| constraints: Constraints, |
| layoutDirection: LayoutDirection |
| ): MeasureScope.MeasureResult { |
| val placeable = measurables.first().measure(constraints, layoutDirection) |
| return measureScope.layout(placeable.width, placeable.height) { |
| // do not place |
| } |
| } |
| } |