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/*
* Copyright 2026 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
*
* https://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 com.example.compose.snippets.test
import android.widget.Button
import android.widget.TextView
import androidx.compose.runtime.Composable
import androidx.compose.ui.test.ExperimentalTestApi
import androidx.compose.ui.test.assertIsDisplayed
import androidx.compose.ui.test.junit4.v2.createComposeRule
import androidx.compose.ui.test.onNodeWithTag
import androidx.compose.ui.test.onNodeWithText
import androidx.compose.ui.test.performClick
import androidx.compose.ui.test.v2.runComposeUiTest
import androidx.fragment.app.Fragment
import androidx.fragment.app.testing.launchFragmentInContainer
import org.junit.Rule
import org.junit.Test
class TestSyncSnippets {
@get:Rule val composeTestRule = createComposeRule()
@OptIn(ExperimentalTestApi::class)
// [START android_compose_test_runWithoutImplicitWaitSample]
@Test
fun runWithoutImplicitWaitSample() = runComposeUiTest {
setContent { MainScreen() }
mainClock.autoAdvance = false
// Trigger an animation
onNodeWithText("Start Animation").performClick()
// Step through the animation frame-by-frame
while (hasPendingWork()) {
mainClock.advanceTimeByFrame()
waitForIdle()
runOnUiThread {
// Suppress implicit synchronization inside this block to avoid redundant
// waits on each node query, making the frame assertions execute much faster.
runWithoutImplicitWait {
val box1 = onNodeWithTag("Box1").fetchSemanticsNode()
val box2 = onNodeWithTag("Box2").fetchSemanticsNode()
val box3 = onNodeWithTag("Box3").fetchSemanticsNode()
// Assert the exact intermediate state of all three properties for this frame
assert(box1.boundsInRoot.right <= box2.boundsInRoot.left)
assert(box2.boundsInRoot.right <= box3.boundsInRoot.left)
}
}
}
}
// [END android_compose_test_runWithoutImplicitWaitSample]
// [START android_compose_test_testBidirectionalInteropUIUpdates_old]
@Test
fun testBidirectionalInteropUIUpdates_old() {
val scenario = launchFragmentInContainer<InteropFragment>()
composeTestRule.waitForIdle()
scenario.onFragment { fragment ->
fragment.legacyButton.performClick()
}
// Jump to Test Thread to verify state settles inside compose
composeTestRule.waitForIdle()
composeTestRule.onNodeWithText("Legacy Clicks: 1").assertIsDisplayed()
composeTestRule.onNodeWithText("Increment Legacy TextView").performClick()
composeTestRule.waitForIdle()
// Jump back to Main Thread to verify target view state settles
scenario.onFragment { fragment ->
assert(fragment.legacyTextView.text.toString() == "Compose Clicks: 1")
}
}
// [END android_compose_test_testBidirectionalInteropUIUpdates_old]
// [START android_compose_test_testBidirectionalInteropUIUpdates_new]
@Test
fun testBidirectionalInteropUIUpdates_new() {
val scenario = launchFragmentInContainer<InteropFragment>()
composeTestRule.waitForIdle()
scenario.onFragment { fragment ->
fragment.legacyButton.performClick()
composeTestRule.waitForIdle()
composeTestRule.onNodeWithText("Legacy Clicks: 1").assertIsDisplayed()
composeTestRule.onNodeWithText("Increment Legacy TextView").performClick()
composeTestRule.waitForIdle()
assert(fragment.legacyTextView.text.toString() == "Compose Clicks: 1")
}
}
// [END android_compose_test_testBidirectionalInteropUIUpdates_new]
@Composable fun MainScreen() { }
class InteropFragment: Fragment() {
lateinit var legacyButton: Button
lateinit var legacyTextView: TextView
}
}