| /* |
| * 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.compose.ui.layout |
| |
| import android.view.ViewGroup |
| import android.widget.FrameLayout |
| import androidx.compose.runtime.Recomposer |
| import androidx.test.filters.SmallTest |
| import androidx.compose.ui.unit.Constraints |
| import androidx.compose.ui.Layout |
| import androidx.compose.ui.Modifier |
| import androidx.compose.ui.onPositioned |
| import androidx.compose.ui.test.TestActivity |
| import androidx.compose.foundation.layout.fillMaxSize |
| import androidx.compose.ui.platform.setContent |
| import androidx.compose.ui.unit.PxBounds |
| import org.junit.Assert.assertEquals |
| import org.junit.Assert.assertNotEquals |
| import org.junit.Assert.assertNotNull |
| import org.junit.Assert.assertTrue |
| import org.junit.Before |
| 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 |
| |
| @SmallTest |
| @RunWith(JUnit4::class) |
| class RootNodeLayoutTest { |
| |
| @Suppress("DEPRECATION") |
| @get:Rule |
| val rule = androidx.test.rule.ActivityTestRule<TestActivity>(TestActivity::class.java) |
| private lateinit var activity: TestActivity |
| |
| @Before |
| fun setup() { |
| activity = rule.activity |
| activity.hasFocusLatch.await(5, TimeUnit.SECONDS) |
| } |
| |
| @Test |
| fun rootMeasuresWithZeroMinConstraints() { |
| var realConstraints: Constraints? = null |
| val latch = CountDownLatch(1) |
| rule.runOnUiThread { |
| activity.setContent { |
| Layout({}) { _, constraints -> |
| realConstraints = constraints |
| latch.countDown() |
| layout(10, 10) {} |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertNotNull(realConstraints) |
| assertEquals(0, realConstraints!!.minWidth) |
| assertEquals(0, realConstraints!!.minHeight) |
| } |
| |
| @Test |
| fun rootPositionsInTheTopLeftCorner() { |
| var coordinates: LayoutCoordinates? = null |
| val latch = CountDownLatch(1) |
| rule.runOnUiThread { |
| activity.setContent { |
| Layout({}, Modifier.onPositioned { |
| coordinates = it |
| latch.countDown() |
| }) { _, _ -> |
| layout(10, 10) {} |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertNotNull(coordinates) |
| assertEquals(PxBounds(left = 0f, top = 0f, right = 10f, bottom = 10f), |
| coordinates!!.boundsInRoot) |
| } |
| |
| @Test |
| fun viewMeasuredCorrectlyWithWrapContent() { |
| val latch = CountDownLatch(1) |
| val child = FrameLayout(activity) |
| rule.runOnUiThread { |
| val parent = FrameLayout(activity) |
| parent.addView(child, FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, |
| ViewGroup.LayoutParams.WRAP_CONTENT)) |
| activity.setContentView(parent) |
| child.setContent(Recomposer.current()) { |
| Layout({}, Modifier.onPositioned { |
| latch.countDown() |
| }) { _, _ -> |
| layout(10, 15) {} |
| } |
| } |
| } |
| |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertEquals(10, child.measuredWidth) |
| assertEquals(15, child.measuredHeight) |
| } |
| |
| @Test |
| fun viewMeasuredCorrectlyWithMatchParent() { |
| val latch = CountDownLatch(1) |
| val child = FrameLayout(activity) |
| val parent = FrameLayout(activity) |
| rule.runOnUiThread { |
| parent.addView(child, FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, |
| ViewGroup.LayoutParams.MATCH_PARENT)) |
| activity.setContentView(parent) |
| child.setContent(Recomposer.current()) { |
| Layout({}, Modifier.fillMaxSize().onPositioned { |
| latch.countDown() |
| }) { _, _ -> |
| layout(10, 15) {} |
| } |
| } |
| } |
| |
| val composeView = child.getChildAt(0) |
| assertTrue(latch.await(1, TimeUnit.SECONDS)) |
| assertNotEquals(10, composeView.measuredWidth) |
| assertNotEquals(15, composeView.measuredHeight) |
| assertEquals(parent.measuredWidth, composeView.measuredWidth) |
| assertEquals(parent.measuredHeight, composeView.measuredHeight) |
| } |
| } |