| /* |
| * Copyright 2019 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.layout.test |
| |
| import android.content.res.Resources |
| import androidx.compose.Composable |
| import androidx.test.filters.SmallTest |
| import androidx.ui.core.Alignment |
| import androidx.ui.core.IntPx |
| import androidx.ui.core.Layout |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.PxPosition |
| import androidx.ui.core.PxSize |
| import androidx.ui.core.Ref |
| import androidx.ui.core.dp |
| import androidx.ui.core.ipx |
| import androidx.ui.core.min |
| import androidx.ui.core.toRect |
| import androidx.ui.core.withDensity |
| import androidx.ui.engine.geometry.Rect |
| import androidx.ui.layout.Align |
| import androidx.ui.layout.LayoutAspectRatio |
| import androidx.ui.layout.Container |
| import androidx.ui.layout.LayoutExpanded |
| import androidx.ui.layout.LayoutExpandedHeight |
| import androidx.ui.layout.LayoutExpandedWidth |
| import org.junit.Assert |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| import java.util.concurrent.CountDownLatch |
| import java.util.concurrent.TimeUnit |
| |
| @SmallTest |
| @RunWith(JUnit4::class) |
| class ExpandedModifierTest : LayoutTest() { |
| private val Width = 100.dp |
| private val Height = 100.dp |
| |
| @Test |
| fun testExpandedModifier_correctSize() = withDensity(density) { |
| val displayMetrics = Resources.getSystem().displayMetrics |
| val screenWidth = displayMetrics.widthPixels.toFloat() |
| val screenHeight = displayMetrics.heightPixels.toFloat() |
| |
| Assert.assertEquals( |
| Rect(0f, 0f, Width.toIntPx().value.toFloat(), Height.toIntPx().value.toFloat()), |
| getSize().toRect() |
| ) |
| Assert.assertEquals( |
| Rect(0f, 0f, screenWidth, Height.toIntPx().value.toFloat()), |
| getSize(LayoutExpandedWidth).toRect() |
| ) |
| Assert.assertEquals( |
| Rect(0f, 0f, Width.toIntPx().value.toFloat(), screenHeight), |
| getSize(LayoutExpandedHeight).toRect() |
| ) |
| Assert.assertEquals( |
| Rect(0f, 0f, screenWidth, screenHeight), |
| getSize(LayoutExpanded).toRect() |
| ) |
| } |
| |
| @Test |
| fun testExpandedModifier_noChangeIntrinsicMeasurements() = withDensity(density) { |
| verifyIntrinsicMeasurements(LayoutExpandedWidth) |
| verifyIntrinsicMeasurements(LayoutExpandedHeight) |
| verifyIntrinsicMeasurements(LayoutExpanded) |
| } |
| |
| private fun getSize(modifier: Modifier = Modifier.None): PxSize { |
| val positionedLatch = CountDownLatch(1) |
| val size = Ref<PxSize>() |
| val position = Ref<PxPosition>() |
| show { |
| Layout(@Composable { |
| Align(alignment = Alignment.TopLeft) { |
| Container(modifier = modifier) { |
| Container(width = Width, height = Height) { } |
| SaveLayoutInfo(size, position, positionedLatch) |
| } |
| } |
| }) { measurables, incomingConstraints -> |
| require(measurables.isNotEmpty()) |
| val placeable = measurables.first().measure(incomingConstraints) |
| layout( |
| min(placeable.width, incomingConstraints.maxWidth), |
| min(placeable.height, incomingConstraints.maxHeight) |
| ) { |
| placeable.place(IntPx.Zero, IntPx.Zero) |
| } |
| } |
| } |
| positionedLatch.await(1, TimeUnit.SECONDS) |
| return size.value!! |
| } |
| |
| private fun verifyIntrinsicMeasurements(expandedModifier: Modifier) = withDensity(density) { |
| // intrinsic measurements do not change with the ExpandedModifier |
| testIntrinsics(@Composable { |
| Container(expandedModifier wraps LayoutAspectRatio(2f), |
| width = 30.dp, height = 40.dp) { } |
| }) { minIntrinsicWidth, minIntrinsicHeight, maxIntrinsicWidth, maxIntrinsicHeight -> |
| // Width |
| assertEquals(40.ipx, minIntrinsicWidth(20.ipx)) |
| assertEquals(30.dp.toIntPx(), minIntrinsicWidth(IntPx.Infinity)) |
| |
| assertEquals(40.ipx, maxIntrinsicWidth(20.ipx)) |
| assertEquals(30.dp.toIntPx(), maxIntrinsicWidth(IntPx.Infinity)) |
| |
| // Height |
| assertEquals(20.ipx, minIntrinsicHeight(40.ipx)) |
| assertEquals(40.dp.toIntPx(), minIntrinsicHeight(IntPx.Infinity)) |
| |
| assertEquals(20.ipx, maxIntrinsicHeight(40.ipx)) |
| assertEquals(40.dp.toIntPx(), maxIntrinsicHeight(IntPx.Infinity)) |
| } |
| } |
| } |