Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Coroutines Test 入門 / Android Test Night #8
Search
star_zero
March 10, 2023
Programming
2
1k
Coroutines Test 入門 / Android Test Night #8
star_zero
March 10, 2023
Tweet
Share
More Decks by star_zero
See All by star_zero
今からはじめるAndroidアプリ開発 2024 / DevFest 2024
star_zero
0
1.1k
Jetpack Compose の Side-effect を使いこなす / DroidKaigi 2023
star_zero
5
5.6k
Android 14 新機能 / Android 14 Meetup Nagoya
star_zero
1
580
Android 14 と Predictive back gesture / Shibuya.apk #42
star_zero
0
360
What's new in Jetpack / I/O Extended Japan 2022
star_zero
1
620
Kotlin 2021 Recap / DevFest 2021
star_zero
3
1.2k
Kotlin Symbol Processing (KSP) を使ったコード生成 / DroidKaigi 2021
star_zero
2
5.2k
What's new Android 12
star_zero
0
560
これからはじめるAndroid開発 / DevFest 2020
star_zero
4
690
Other Decks in Programming
See All in Programming
ATDDで素早く安定した デリバリを実現しよう!
tonnsama
1
2k
rails newと同時に型を書く
aki19035vc
6
720
各クラウドサービスにおける.NETの対応と見解
ymd65536
0
250
watsonx.ai Dojo #6 継続的なAIアプリ開発と展開
oniak3ibm
PRO
0
180
functionalなアプローチで動的要素を排除する
ryopeko
1
370
良いユニットテストを書こう
mototakatsu
12
3.6k
PicoRubyと暮らす、シェアハウスハック
ryosk7
0
230
毎日13時間もかかるバッチ処理をたった3日で60%短縮するためにやったこと
sho_ssk_
1
560
はてなにおけるfujiwara-wareの活用やecspressoのCI/CD構成 / Fujiwara Tech Conference 2025
cohalz
3
2.8k
Package Traits
ikesyo
1
210
Androidアプリのモジュール分割における:x:commonを考える
okuzawats
1
280
Fibonacci Function Gallery - Part 2
philipschwarz
PRO
0
220
Featured
See All Featured
No one is an island. Learnings from fostering a developers community.
thoeni
19
3.1k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
44
7k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
10
870
Why You Should Never Use an ORM
jnunemaker
PRO
54
9.2k
Done Done
chrislema
182
16k
Building Your Own Lightsaber
phodgson
104
6.2k
Build The Right Thing And Hit Your Dates
maggiecrowley
33
2.5k
Automating Front-end Workflow
addyosmani
1366
200k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
47
5.1k
GitHub's CSS Performance
jonrohan
1030
460k
Bootstrapping a Software Product
garrettdimon
PRO
305
110k
Building Flexible Design Systems
yeseniaperezcruz
328
38k
Transcript
Android Test Night #8 2023/03/10 Coroutines Test 入門
• Kenji Abe • @STAR_ZERO • Google Developers Expert for
Android, Kotlin • DeNA Co., Ltd.
// build.gradle dependencies { // ... testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.4") }
supsend関数のテスト
class Sample { suspend fun run(): String { return "hoge"
} }
class SampleTest { @Test fun testRun() = runTest { val
sample = Sample() val result = sample.run() assert(result == "hoge") } }
class SampleTest { @Test fun testRun() = runTest { val
sample = Sample() val result = sample.run() assert(result == "hoge") } }
• runBlockingのようなもの • delay関数はすべてスキップされる ◦ Vertial Timeを制御することができる • TestScopeが使用される runTest
TestDispatchers
• StandardTestDispatcher ◦ runTestデフォルト ◦ TestCoroutineSchedulerを使用するシンプルなDispatcher • UnconfinedTestDispatcher ◦ Dispatchers.Unconfinedのようなもの
◦ トップレベルのlaunch/asyncがすぐに実行される TestDispatchers
class SampleTest { @Test fun testRun() = runTest { val
sample = Sample() val result = sample.run() assert(result == "hoge") } }
@Test fun test() = runTest { var result = 0
launch { result = 1 } assert(result == 1) }
@Test fun test() = runTest { var result = 0
launch { result = 1 } assert(result == 1) } ❌ Failed
@Test fun test() = runTest { var result = 0
launch { result = 1 } assert(result == 1) } ① ② ③
@Test fun test() = runTest { var result = 0
launch { result = 1 } runCurrent() assert(result == 1) } ✅ Success
@Test fun test() = runTest { var result = 0
launch { result = 1 } runCurrent() assert(result == 1) } ① ② ③ ④
@Test fun test() = runTest { var result = 0
launch { delay(1000) result = 1 } runCurrent() assert(result == 1) }
@Test fun test() = runTest { var result = 0
launch { delay(1000) result = 1 } runCurrent() assert(result == 1) } ❌ Failed
@Test fun test() = runTest { var result = 0
launch { delay(1000) result = 1 } runCurrent() assert(result == 1) } ① ② ③ ④ ⑤
@Test fun test() = runTest { // ... advanceUntilIdle() //
または advanceTimeBy(1001) assert(result == 1) } ✅ Success
@Test fun test() = runTest(UnconfinedTestDispatcher()) { var result = 0
launch { result = 1 } assert(result == 1) }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { var result = 0
launch { result = 1 } assert(result == 1) } ✅ Success
Mainスレッド対応
class Sample { suspend fun run(): String = withContext(Dispatchers.Main) {
"hoge" } }
@Test fun testRun() = runTest { val sample = Sample()
val result = sample.run() assert(result == "hoge") }
@Test fun testRun() = runTest { val sample = Sample()
val result = sample.run() assert(result == "hoge") }
@Before fun setUp() { Dispatchers.setMain(StandardTestDispatcher()) } @After fun tearDown() {
Dispatchers.resetMain() }
Flowのテスト
class Sample { val flow = MutableSharedFlow<Int>() suspend fun emit(value:
Int) { flow.emit(value) } }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { val sample = Sample()
val result = mutableListOf<Int>() val job = launch { sample.flow.toCollection(result) } assert(result.size == 0) sample.emit(1) assert(result.size == 1) assert(result.first() == 1) job.cancel() }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { val sample = Sample()
val result = mutableListOf<Int>() // ... }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { val sample = Sample()
val result = mutableListOf<Int>() val job = launch { sample.flow.toCollection(result) } // ... }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { val sample = Sample()
val result = mutableListOf<Int>() val job = launch { sample.flow.toCollection(result) } // ... }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { // ... val job
= launch { sample.flow.toCollection(result) } assert(result.size == 0) // ... }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { // ... val job
= launch { sample.flow.toCollection(result) } sample.emit(1) // ... }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { // ... sample.emit(1) assert(result.size
== 1) assert(result.first() == 1) job.cancel() }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { // ... val job
= launch { sample.flow.toCollection(result) } // ... job.cancel() }
@Test fun test() = runTest(UnconfinedTestDispatcher()) { // ... backgroundScope.launch {
sample.flow.toCollection(result) } // ... // job.cancel() }
Turbine (時間の都合上省略...) https://github.com/cashapp/turbine
まとめ
• runTest • StandardTestDispatcher / UnconfinedTestDispatcher • Dispatchers.setMain • backgroundScope
まとめ
ありがとうございました