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175 lines (149 loc) · 5.55 KB
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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.touchinput.focus
import androidx.compose.runtime.Composable
import androidx.compose.ui.input.key.Key
import androidx.compose.ui.test.assertIsFocused
import androidx.compose.ui.test.assertIsNotFocused
import androidx.compose.ui.test.junit4.createComposeRule
import androidx.compose.ui.test.onNodeWithTag
import androidx.compose.ui.test.performClick
import androidx.compose.ui.test.performKeyInput
import androidx.compose.ui.test.pressKey
import androidx.compose.ui.test.withKeyDown
import androidx.test.ext.junit.runners.AndroidJUnit4
import org.junit.Rule
import org.junit.Test
import org.junit.runner.RunWith
// [START android_compose_touchinput_focus_test_setup]
@RunWith(AndroidJUnit4::class)
class FocusNavigationTest {
@get:Rule
val composeTestRule = createComposeRule()
// [END android_compose_touchinput_focus_test_setup]
// [START android_compose_touchinput_focus_test_targets]
@Test
fun interactiveElement_isFocusTarget() {
composeTestRule.setContent {
AppTheme {
CardListScreen()
}
}
val firstCard = composeTestRule.onNodeWithTag("card_1")
val secondCard = composeTestRule.onNodeWithTag("card_2")
// Focus the first element
firstCard.performClick()
firstCard.assertIsFocused()
secondCard.assertIsNotFocused()
}
// [END android_compose_touchinput_focus_test_targets]
// [START android_compose_touchinput_focus_test_1d_traversal]
@Test
fun tabKey_navigatesInAppearanceOrder() {
composeTestRule.setContent {
AppTheme {
CardListScreen()
}
}
val firstCard = composeTestRule.onNodeWithTag("card_1")
val secondCard = composeTestRule.onNodeWithTag("card_2")
val thirdCard = composeTestRule.onNodeWithTag("card_3")
firstCard.performClick()
firstCard.assertIsFocused()
// Press Tab -> Moves to second card
firstCard.performKeyInput {
pressKey(Key.Tab)
}
secondCard.assertIsFocused()
firstCard.assertIsNotFocused()
// Press Tab -> Moves to third card
secondCard.performKeyInput {
pressKey(Key.Tab)
}
thirdCard.assertIsFocused()
// Press Shift + Tab -> Moves backward to second card
thirdCard.performKeyInput {
withKeyDown(Key.ShiftLeft) {
pressKey(Key.Tab)
}
}
secondCard.assertIsFocused()
}
// [END android_compose_touchinput_focus_test_1d_traversal]
// [START android_compose_touchinput_focus_test_2d_traversal]
@Test
fun arrowKeys_moveFocusTwoDimensionallyWithoutWrap() {
composeTestRule.setContent {
AppTheme {
GridLayoutScreen()
}
}
val topLeftButton = composeTestRule.onNodeWithTag("btn_top_left")
val bottomLeftButton = composeTestRule.onNodeWithTag("btn_bottom_left")
topLeftButton.performClick()
topLeftButton.assertIsFocused()
// Down arrow moves focus downward to bottom-left button
topLeftButton.performKeyInput {
pressKey(Key.DirectionDown)
}
bottomLeftButton.assertIsFocused()
// Directional keys do not wrap around: pressing Down on bottom element stays focused
bottomLeftButton.performKeyInput {
pressKey(Key.DirectionDown)
}
bottomLeftButton.assertIsFocused()
}
// [END android_compose_touchinput_focus_test_2d_traversal]
// [START android_compose_touchinput_focus_test_text_fields]
@Test
fun textField_handlesTabAccordingToLineLimits() {
composeTestRule.setContent {
AppTheme {
FormScreen()
}
}
val singleLineNode = composeTestRule.onNodeWithTag("single_line_field")
val multiLineNode = composeTestRule.onNodeWithTag("multi_line_field")
val submitButtonNode = composeTestRule.onNodeWithTag("submit_button")
// Single-line field advances focus on Tab
singleLineNode.performClick()
singleLineNode.assertIsFocused()
singleLineNode.performKeyInput { pressKey(Key.Tab) }
multiLineNode.assertIsFocused()
// Multi-line field keeps focus and inserts '\t'
multiLineNode.performKeyInput { pressKey(Key.Tab) }
multiLineNode.assertIsFocused()
submitButtonNode.assertIsNotFocused()
// Shift + Tab escapes multi-line field to previous target
multiLineNode.performKeyInput {
withKeyDown(Key.ShiftLeft) { pressKey(Key.Tab) }
}
singleLineNode.assertIsFocused()
}
// [END android_compose_touchinput_focus_test_text_fields]
// [START_EXCLUDE]
}
@Composable
private fun AppTheme(content: @Composable () -> Unit) {
content()
}
@Composable
private fun CardListScreen() {}
@Composable
private fun GridLayoutScreen() {}
@Composable
private fun FormScreen() {}
// [END_EXCLUDE]