| /* |
| * 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.test |
| |
| import androidx.test.filters.MediumTest |
| import androidx.ui.core.Alignment |
| import androidx.ui.core.DensityAmbient |
| import androidx.ui.core.LayoutCoordinates |
| import androidx.ui.core.Modifier |
| import androidx.ui.core.onPositioned |
| import androidx.compose.foundation.Box |
| import androidx.compose.foundation.ContentGravity |
| import androidx.ui.geometry.Offset |
| import androidx.compose.foundation.layout.Column |
| import androidx.compose.foundation.layout.preferredSize |
| import androidx.compose.foundation.layout.preferredWidth |
| import androidx.ui.unit.dp |
| import org.junit.Assert.assertEquals |
| import org.junit.Assert.assertTrue |
| import org.junit.Rule |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.junit.runners.JUnit4 |
| import java.util.concurrent.CountDownLatch |
| import java.util.concurrent.TimeUnit |
| |
| @MediumTest |
| @RunWith(JUnit4::class) |
| class LayoutCoordinatesHelperTest { |
| |
| @get:Rule |
| val composeTestRule = createComposeRule(disableTransitions = true) |
| |
| @Test |
| fun positionInParent_noOffset() { |
| val latch = CountDownLatch(2) |
| var parentCoordinates: LayoutCoordinates? = null |
| var childCoordinates: LayoutCoordinates? = null |
| composeTestRule.setContent { |
| Column(Modifier.onPositioned { coordinates: LayoutCoordinates -> |
| parentCoordinates = coordinates |
| latch.countDown() |
| }) { |
| Box( |
| Modifier.preferredSize(10.dp) |
| .gravity(Alignment.Start) |
| .onPositioned { coordinates -> |
| childCoordinates = coordinates |
| latch.countDown() |
| } |
| ) |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals( |
| Offset.Zero, |
| parentCoordinates!!.childToLocal(childCoordinates!!, Offset.Zero) |
| ) |
| } |
| |
| @Test |
| fun positionInParent_centered() { |
| val latch = CountDownLatch(2) |
| var parentCoordinates: LayoutCoordinates? = null |
| var childCoordinates: LayoutCoordinates? = null |
| composeTestRule.setContent { |
| with(DensityAmbient.current) { |
| Box(Modifier.preferredWidth(40.toDp()), gravity = ContentGravity.Center) { |
| Column( |
| Modifier.preferredWidth(20.toDp()) |
| .onPositioned { coordinates: LayoutCoordinates -> |
| parentCoordinates = coordinates |
| latch.countDown() |
| } |
| ) { |
| Box( |
| Modifier.preferredSize(10.toDp()) |
| .gravity(Alignment.CenterHorizontally) |
| .onPositioned { coordinates -> |
| childCoordinates = coordinates |
| latch.countDown() |
| } |
| ) |
| } |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals( |
| Offset(5f, 0f), |
| parentCoordinates!!.childToLocal(childCoordinates!!, Offset.Zero) |
| ) |
| } |
| } |