1 /*
2  * Copyright (C) 2024 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.settingslib.spa.lifecycle
18 
19 import androidx.compose.material3.Text
20 import androidx.compose.ui.test.hasText
21 import androidx.compose.ui.test.junit4.createComposeRule
22 import androidx.test.ext.junit.runners.AndroidJUnit4
23 import com.android.settingslib.spa.testutils.waitUntilExists
24 import kotlinx.coroutines.flow.MutableStateFlow
25 import kotlinx.coroutines.flow.flowOf
26 import org.junit.Rule
27 import org.junit.Test
28 import org.junit.runner.RunWith
29 
30 @RunWith(AndroidJUnit4::class)
31 class FlowExtTest {
32     @get:Rule
33     val composeTestRule = createComposeRule()
34 
35     @Test
collectAsCallbackWithLifecyclenull36     fun collectAsCallbackWithLifecycle() {
37         val flow = flowOf(TEXT)
38 
39         composeTestRule.setContent {
40             val callback = flow.collectAsCallbackWithLifecycle()
41             Text(callback() ?: "")
42         }
43 
44         composeTestRule.waitUntilExists(hasText(TEXT))
45     }
46 
47     @Test
collectAsCallbackWithLifecycle_changednull48     fun collectAsCallbackWithLifecycle_changed() {
49         val flow = MutableStateFlow(TEXT)
50 
51         composeTestRule.setContent {
52             val callback = flow.collectAsCallbackWithLifecycle()
53             Text(callback() ?: "")
54         }
55         flow.value = NEW_TEXT
56 
57         composeTestRule.waitUntilExists(hasText(NEW_TEXT))
58     }
59 
60     private companion object {
61         const val TEXT = "Text"
62         const val NEW_TEXT = "New Text"
63     }
64 }
65