| /* |
| * 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.test |
| |
| import android.graphics.Bitmap |
| import androidx.compose.Composable |
| import androidx.compose.foundation.layout.Spacer |
| import androidx.compose.foundation.layout.Stack |
| import androidx.compose.foundation.layout.size |
| import androidx.compose.mutableStateOf |
| import androidx.compose.onActive |
| import androidx.compose.onDispose |
| import androidx.test.filters.SmallTest |
| import androidx.ui.core.ExperimentalSubcomposeLayoutApi |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.SubcomposeLayout |
| import androidx.ui.core.testTag |
| import androidx.ui.core.zIndex |
| import androidx.compose.ui.graphics.Color |
| import androidx.ui.test.assertHeightIsEqualTo |
| import androidx.ui.test.assertIsDisplayed |
| import androidx.ui.test.assertPositionInRootIsEqualTo |
| import androidx.ui.test.assertWidthIsEqualTo |
| import androidx.ui.test.captureToBitmap |
| import androidx.ui.test.createComposeRule |
| import androidx.ui.test.onNodeWithTag |
| import androidx.ui.test.runOnIdle |
| import androidx.ui.test.waitForIdle |
| import androidx.ui.unit.dp |
| import com.google.common.truth.Truth.assertThat |
| import org.junit.Assert.assertEquals |
| import org.junit.Rule |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| |
| @SmallTest |
| @RunWith(JUnit4::class) |
| @OptIn(ExperimentalSubcomposeLayoutApi::class) |
| class SubcomposeLayoutTest { |
| |
| @get:Rule |
| val rule = createComposeRule() |
| @get:Rule |
| val excessiveAssertions = AndroidOwnerExtraAssertionsRule() |
| |
| @Test |
| fun useSizeOfTheFirstItemInSecondSubcomposition() { |
| val firstTag = "first" |
| val secondTag = "second" |
| |
| rule.setContent { |
| SubcomposeLayout<Int> { constraints -> |
| val first = subcompose(0) { |
| Spacer(Modifier.size(50.dp).testTag(firstTag)) |
| }.first().measure(constraints) |
| |
| // it is an input for the second subcomposition |
| val halfFirstSize = (first.width / 2).toDp() |
| |
| val second = subcompose(1) { |
| Spacer(Modifier.size(halfFirstSize).testTag(secondTag)) |
| }.first().measure(constraints) |
| |
| layout(first.width, first.height) { |
| first.place(0, 0) |
| second.place(first.width - second.width, first.height - second.height) |
| } |
| } |
| } |
| |
| onNodeWithTag(firstTag) |
| .assertPositionInRootIsEqualTo(0.dp, 0.dp) |
| .assertWidthIsEqualTo(50.dp) |
| .assertHeightIsEqualTo(50.dp) |
| |
| onNodeWithTag(secondTag) |
| .assertPositionInRootIsEqualTo(25.dp, 25.dp) |
| .assertWidthIsEqualTo(25.dp) |
| .assertHeightIsEqualTo(25.dp) |
| } |
| |
| @Test |
| fun subcomposeMultipleLayoutsInOneSlot() { |
| val firstTag = "first" |
| val secondTag = "second" |
| val layoutTag = "layout" |
| |
| rule.setContent { |
| SubcomposeLayout<Unit>(Modifier.testTag(layoutTag)) { constraints -> |
| val placeables = subcompose(Unit) { |
| Spacer(Modifier.size(50.dp).testTag(firstTag)) |
| Spacer(Modifier.size(30.dp).testTag(secondTag)) |
| }.map { |
| it.measure(constraints) |
| } |
| |
| val maxWidth = placeables.maxByOrNull { it.width }!!.width |
| val height = placeables.sumBy { it.height } |
| |
| layout(maxWidth, height) { |
| placeables.fold(0) { top, placeable -> |
| placeable.place(0, top) |
| top + placeable.height |
| } |
| } |
| } |
| } |
| |
| onNodeWithTag(firstTag) |
| .assertPositionInRootIsEqualTo(0.dp, 0.dp) |
| .assertWidthIsEqualTo(50.dp) |
| .assertHeightIsEqualTo(50.dp) |
| |
| onNodeWithTag(secondTag) |
| .assertPositionInRootIsEqualTo(0.dp, 50.dp) |
| .assertWidthIsEqualTo(30.dp) |
| .assertHeightIsEqualTo(30.dp) |
| |
| onNodeWithTag(layoutTag) |
| .assertWidthIsEqualTo(50.dp) |
| .assertHeightIsEqualTo(80.dp) |
| } |
| |
| @Test |
| fun recompositionDeepInsideTheSlotDoesntRecomposeUnaffectedLayerOrRemeasure() { |
| val model = mutableStateOf(0) |
| var measuresCount = 0 |
| var recompositionsCount1 = 0 |
| var recompositionsCount2 = 0 |
| |
| rule.setContent { |
| SubcomposeLayout<Unit> { constraints -> |
| measuresCount++ |
| val placeable = subcompose(Unit) { |
| recompositionsCount1++ |
| Stack(Modifier.size(20.dp)) { |
| model.value // model read |
| recompositionsCount2++ |
| } |
| }.first().measure(constraints) |
| |
| layout(placeable.width, placeable.height) { |
| placeable.place(0, 0) |
| } |
| } |
| } |
| |
| runOnIdle { model.value++ } |
| |
| runOnIdle { |
| assertEquals(1, measuresCount) |
| assertEquals(1, recompositionsCount1) |
| assertEquals(2, recompositionsCount2) |
| } |
| } |
| |
| @Test |
| fun recompositionOfTheFirstSlotDoestAffectTheSecond() { |
| val model = mutableStateOf(0) |
| var recompositionsCount1 = 0 |
| var recompositionsCount2 = 0 |
| |
| rule.setContent { |
| SubcomposeLayout<Int> { |
| subcompose(1) { |
| recompositionsCount1++ |
| model.value // model read |
| } |
| subcompose(2) { |
| recompositionsCount2++ |
| } |
| |
| layout(100, 100) { |
| } |
| } |
| } |
| |
| runOnIdle { model.value++ } |
| |
| runOnIdle { |
| assertEquals(2, recompositionsCount1) |
| assertEquals(1, recompositionsCount2) |
| } |
| } |
| |
| @Test |
| fun addLayoutOnlyAfterRecomposition() { |
| val addChild = mutableStateOf(false) |
| val childTag = "child" |
| val layoutTag = "layout" |
| |
| rule.setContent { |
| SubcomposeLayout<Unit>(Modifier.testTag(layoutTag)) { constraints -> |
| val placeables = subcompose(Unit) { |
| if (addChild.value) { |
| Spacer(Modifier.size(20.dp).testTag(childTag)) |
| } |
| }.map { it.measure(constraints) } |
| |
| val size = placeables.firstOrNull()?.width ?: 0 |
| layout(size, size) { |
| placeables.forEach { it.place(0, 0) } |
| } |
| } |
| } |
| |
| onNodeWithTag(layoutTag) |
| .assertWidthIsEqualTo(0.dp) |
| .assertHeightIsEqualTo(0.dp) |
| |
| onNodeWithTag(childTag) |
| .assertDoesNotExist() |
| |
| runOnIdle { |
| addChild.value = true |
| } |
| |
| onNodeWithTag(layoutTag) |
| .assertWidthIsEqualTo(20.dp) |
| .assertHeightIsEqualTo(20.dp) |
| |
| onNodeWithTag(childTag) |
| .assertWidthIsEqualTo(20.dp) |
| .assertHeightIsEqualTo(20.dp) |
| } |
| |
| @Test |
| fun providingNewLambdaCausingRecomposition() { |
| val content = mutableStateOf<@Composable () -> Unit>({ |
| Spacer(Modifier.size(10.dp)) |
| }) |
| |
| rule.setContent { |
| MySubcomposeLayout(content.value) |
| } |
| |
| val updatedTag = "updated" |
| |
| runOnIdle { |
| content.value = { |
| Spacer(Modifier.size(10.dp).testTag(updatedTag)) |
| } |
| } |
| |
| onNodeWithTag(updatedTag) |
| .assertIsDisplayed() |
| } |
| |
| @Composable |
| private fun MySubcomposeLayout(slotContent: @Composable () -> Unit) { |
| SubcomposeLayout<Unit> { constraints -> |
| val placeables = subcompose(Unit, slotContent).map { it.measure(constraints) } |
| val maxWidth = placeables.maxByOrNull { it.width }!!.width |
| val height = placeables.sumBy { it.height } |
| layout(maxWidth, height) { |
| placeables.forEach { it.place(0, 0) } |
| } |
| } |
| } |
| |
| @Test |
| fun notSubcomposedSlotIsDisposed() { |
| val addSlot = mutableStateOf(true) |
| var composed = false |
| var disposed = false |
| |
| rule.setContent { |
| SubcomposeLayout<Unit> { |
| if (addSlot.value) { |
| subcompose(Unit) { |
| onActive { |
| composed = true |
| } |
| onDispose { |
| disposed = true |
| } |
| } |
| } |
| layout(10, 10) {} |
| } |
| } |
| |
| runOnIdle { |
| assertThat(composed).isTrue() |
| assertThat(disposed).isFalse() |
| |
| addSlot.value = false |
| } |
| |
| runOnIdle { |
| assertThat(disposed).isTrue() |
| } |
| } |
| |
| @Test |
| fun slotsAreDrawnInTheOrderTheyComposed() { |
| val layoutTag = "layout" |
| |
| rule.setContent { |
| SubcomposeLayout<Color>(Modifier.testTag(layoutTag)) { constraints -> |
| val first = subcompose(Color.Red) { |
| Spacer(Modifier.size(10.dp).background(Color.Red)) |
| }.first().measure(constraints) |
| val second = subcompose(Color.Green) { |
| Spacer(Modifier.size(10.dp).background(Color.Green)) |
| }.first().measure(constraints) |
| layout(first.width, first.height) { |
| first.place(0, 0) |
| second.place(0, 0) |
| } |
| } |
| } |
| |
| waitForIdle() |
| |
| onNodeWithTag(layoutTag) |
| .captureToBitmap() |
| .assertCenterPixelColor(Color.Green) |
| } |
| |
| @Test |
| fun slotsCouldBeReordered() { |
| val layoutTag = "layout" |
| val firstSlotIsRed = mutableStateOf(true) |
| |
| rule.setContent { |
| SubcomposeLayout<Color>(Modifier.testTag(layoutTag)) { constraints -> |
| val firstColor = if (firstSlotIsRed.value) Color.Red else Color.Green |
| val secondColor = if (firstSlotIsRed.value) Color.Green else Color.Red |
| val first = subcompose(firstColor) { |
| Spacer(Modifier.size(10.dp).background(firstColor)) |
| }.first().measure(constraints) |
| val second = subcompose(secondColor) { |
| Spacer(Modifier.size(10.dp).background(secondColor)) |
| }.first().measure(constraints) |
| layout(first.width, first.height) { |
| first.place(0, 0) |
| second.place(0, 0) |
| } |
| } |
| } |
| |
| onNodeWithTag(layoutTag) |
| .captureToBitmap() |
| .assertCenterPixelColor(Color.Green) |
| |
| runOnIdle { |
| firstSlotIsRed.value = false |
| } |
| |
| onNodeWithTag(layoutTag) |
| .captureToBitmap() |
| .assertCenterPixelColor(Color.Red) |
| } |
| |
| @Test |
| fun drawingOrderCouldBeChangedUsingZIndex() { |
| val layoutTag = "layout" |
| |
| rule.setContent { |
| SubcomposeLayout<Color>(Modifier.testTag(layoutTag)) { constraints -> |
| val first = subcompose(Color.Red) { |
| Spacer(Modifier.size(10.dp).background(Color.Red).zIndex(1f)) |
| }.first().measure(constraints) |
| val second = subcompose(Color.Green) { |
| Spacer(Modifier.size(10.dp).background(Color.Green)) |
| }.first().measure(constraints) |
| layout(first.width, first.height) { |
| first.place(0, 0) |
| second.place(0, 0) |
| } |
| } |
| } |
| |
| onNodeWithTag(layoutTag) |
| .captureToBitmap() |
| .assertCenterPixelColor(Color.Red) |
| } |
| |
| @Test |
| fun slotsAreDisposedWhenLayoutIsDisposed() { |
| val addLayout = mutableStateOf(true) |
| var firstDisposed = false |
| var secondDisposed = false |
| |
| rule.setContent { |
| if (addLayout.value) { |
| SubcomposeLayout<Int> { |
| subcompose(0) { |
| onDispose { |
| firstDisposed = true |
| } |
| } |
| subcompose(1) { |
| onDispose { |
| secondDisposed = true |
| } |
| } |
| layout(10, 10) {} |
| } |
| } |
| } |
| |
| runOnIdle { |
| assertThat(firstDisposed).isFalse() |
| assertThat(secondDisposed).isFalse() |
| |
| addLayout.value = false |
| } |
| |
| runOnIdle { |
| assertThat(firstDisposed).isTrue() |
| assertThat(secondDisposed).isTrue() |
| } |
| } |
| } |
| |
| fun Bitmap.assertCenterPixelColor(expectedColor: Color) { |
| assertColor(expectedColor, width / 2, height / 2) |
| } |