| /* |
| * 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.compose.runtime.getValue |
| import androidx.compose.runtime.mutableStateOf |
| import androidx.compose.runtime.onCommit |
| import androidx.compose.runtime.setValue |
| import androidx.test.filters.FlakyTest |
| import androidx.test.filters.MediumTest |
| import com.google.common.truth.Truth.assertThat |
| 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.atomic.AtomicBoolean |
| |
| @MediumTest |
| @RunWith(JUnit4::class) |
| class WaitingForOnCommitCallbackTest { |
| |
| @get:Rule |
| val composeTestRule = createComposeRule() |
| |
| @Test |
| fun setContentAndWaitForIdleReleasesAfterOnCommitCallback() { |
| val atomicBoolean = AtomicBoolean(false) |
| var switch by mutableStateOf(true) |
| composeTestRule.setContent { |
| onCommit(switch) { |
| atomicBoolean.set(switch) |
| } |
| } |
| |
| assertThat(atomicBoolean.get()).isTrue() |
| |
| runOnIdle { |
| switch = false |
| } |
| waitForIdle() |
| |
| assertThat(atomicBoolean.get()).isFalse() |
| } |
| |
| @Test |
| @FlakyTest(bugId = 160399857, detail = "Fails about 1% of the time") |
| fun cascadingOnCommits() { |
| // Collect unique values (markers) at each step during the process and |
| // at the end verify that they were collected in the right order |
| val values = mutableListOf<Int>() |
| |
| // Use a latch to make sure all collection events have occurred, to avoid |
| // concurrent modification exceptions when checking the collected values, |
| // in case some values still need to be collected due to a bug. |
| var latch = CountDownLatch(0) |
| |
| var switch1 by mutableStateOf(true) |
| var switch2 by mutableStateOf(true) |
| var switch3 by mutableStateOf(true) |
| var switch4 by mutableStateOf(true) |
| composeTestRule.setContent { |
| onCommit(switch1) { |
| values.add(2) |
| switch2 = switch1 |
| } |
| onCommit(switch2) { |
| values.add(3) |
| switch3 = switch2 |
| } |
| onCommit(switch3) { |
| values.add(4) |
| switch4 = switch3 |
| } |
| onCommit(switch4) { |
| values.add(5) |
| latch.countDown() |
| } |
| } |
| |
| runOnIdle { |
| latch = CountDownLatch(1) |
| values.clear() |
| |
| // Kick off the cascade |
| values.add(1) |
| switch1 = false |
| } |
| |
| waitForIdle() |
| // Mark the end |
| values.add(6) |
| |
| // Make sure all writes into the list are complete |
| latch.await() |
| |
| // And check if all was in the right order |
| assertThat(values).containsExactly(1, 2, 3, 4, 5, 6).inOrder() |
| } |
| } |