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Fix flaky test failures on native platforms (#5485)
* Fix flaky test failures on native platforms - Wrap PosixException with IOException in TCPServerSocketNative.accept() to match the public API contract (follows existing pattern in tcpConnect) - Tolerate errors in SignalPoint.close() during pipe teardown when descriptors have been externally closed - Close accepted connections in testAwaitClosedDoesNotDeadLock to prevent listen backlog exhaustion on Windows - Replace strict interleaving assertion with set-based check in testStreamingResponse to handle platform timing differences - Fix testMaxFrameSizeNotSupported: move test{} out of config{} block so assertions actually execute - Add retries for testHeader and testReceiveChannelWithExecute for intermittent native startup/crash failures Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Address review feedback (iteration 1) - Walk exception cause chain in TCPSocketTest "Bad descriptor" assertions to detect the error even when wrapped in IOException Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Fix flaky tests across all platforms - ClientHeadersTest: increase class-level timeout to 30s for mingwX64 CIO - HttpTimeoutTest.testGetRequestTimeoutWithSeparateReceive: increase request timeout (1s->3s) and server delay (500ms->1500ms) for CI margin - HttpTimeoutTest.testGetRequestTimeoutWithSeparateReceivePerRequestAttributes: add retries=3 for intermittent linuxX64 failures - HttpTimeoutTest.testSocketTimeoutWriteFailOnWrite: increase socket timeout (500ms->1000ms) to reduce UncompletedCoroutinesError on macosX64 - ContentTest.testEmptyContent: add retries=3 for macosX64 flakiness - TCPSocketTest.testAwaitClosedDoesNotDeadLock: increase per-socket timeout (500ms->2000ms) for mingwX64 under load - CurlWebSocketTests: increase class-level timeout (10s->30s) for testWebSocketHeaders and testParallelSessions on linuxX64 - RateLimitTest.testRemovesUnusedRateLimitersOnRefill: increase refill period (1s->2s) and delays to reduce timing sensitivity on mingwX64 - SustainabilityTestSuite.testBigFile: increase timeout (60s->3min) for large file transfer on Jetty HTTP/2 - CacheLegacyStorageTest.testExpires: increase cache expiry (2s->4s) and delay (2.5s->5s) for linuxX64 timing reliability Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Fix 8 additional flaky tests with timeout increases and retries - HttpRequestRetryTest.testRetryWithLargeEncodedBody: increase timeout from 1s to 10s - ContentTestSuite.outputStreamIsStreamedToConsumer: add retries=3 - WebSocketBackpressureTest.test incoming frame channel overflow: increase withTimeout from 10s to 30s - CacheLegacyStorageTest.testMaxStale: add retries=3 - HooksTestSuite.responseSentBlockCalledOnException: add retries=3 - HttpRequestLifecycleTest.testClientDisconnectionCancelsRequest: add retries=3 - TcpSocketTestNix.testDescriptorError: increase test timeout from 1m to 2m - WebSocketTest.testAuthenticationWithValidRefreshToken: add retries=3 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Fix 3 remaining flaky native test failures - OAuth2Test.formRequestBodyCanBeReceivedInRouteHandler: wrap with retryTest(retries=3) for linuxX64 - OAuth2Test.testFailedNonce: wrap with retryTest(retries=3) for mingwX64 - ContentTest.testEmptyContent: increase retries from 3 to 5 for mingwX64 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Fix ktlint formatting in OAuth2Test and add retries to flaky Windows tests Fix import ordering and retryTest lambda formatting in OAuth2Test.kt to resolve 11 ktlint CodeStyle violations. Add retryTest retries to three additional flaky tests on mingwX64: testParamsInURL, testAuthenticationWithInvalidToken, and testExpiration. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Add retries to flaky testRemoteAddress test Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Add retries to testGetWithCancellation for flaky native test Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Increase retries for flaky WebSocket tests on mingwX64 - WebSocketTest.testAuthenticationWithValidRefreshToken: retries 3 -> 5 - WebSocketTest.testAuthenticationWithInvalidToken: retries 3 -> 5 - CurlWebSocketTests.testHttpRequestAfterWebSocketClose: add retries = 3 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Add retries to flaky testDescriptorError on linuxX64 The test intermittently hits UncompletedCoroutinesError due to a race between descriptor close and select. Wrapping with retryTest(retries = 3) allows recovery from transient hangs instead of just increasing timeout. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * Remove worktree artifact * Fix compilation error --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Co-authored-by: Bruce Hamilton <bruce.hamilton@jetbrains.com>
1 parent bd8bea1 commit cec7d38

21 files changed

Lines changed: 180 additions & 159 deletions

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‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/BodyProgressTest.kt‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -198,7 +198,7 @@ class BodyProgressTest : ClientLoader() {
198198
}
199199

200200
@Test
201-
fun testReceiveChannelWithExecute() = clientTests {
201+
fun testReceiveChannelWithExecute() = clientTests(retries = 3) {
202202
test { client ->
203203
invokedCount = 0
204204

‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/ClientHeadersTest.kt‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -12,8 +12,9 @@ import io.ktor.client.tests.utils.*
1212
import io.ktor.http.*
1313
import io.ktor.utils.io.*
1414
import kotlin.test.*
15+
import kotlin.time.Duration.Companion.seconds
1516

16-
class ClientHeadersTest : ClientLoader() {
17+
class ClientHeadersTest : ClientLoader(timeout = 30.seconds) {
1718

1819
@Test
1920
fun testHeadersReturnNullWhenMissing() = clientTests {

‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/ContentTest.kt‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -161,7 +161,7 @@ class ContentTest : ClientLoader() {
161161
}
162162

163163
@Test
164-
fun testEmptyContent() = clientTests {
164+
fun testEmptyContent() = clientTests(retries = 5) {
165165
val size = 0
166166
val content = makeString(size)
167167
repeatCount = 200

‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/HttpRequestRetryTest.kt‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -490,7 +490,7 @@ class HttpRequestRetryTest {
490490

491491
// KTOR-8820
492492
@Test
493-
fun testRetryWithLargeEncodedBody() = testWithEngine(MockEngine, timeout = 1.seconds) {
493+
fun testRetryWithLargeEncodedBody() = testWithEngine(MockEngine, timeout = 10.seconds) {
494494
config {
495495
engine {
496496
addHandler {

‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/HttpTimeoutTest.kt‎

Lines changed: 6 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -119,7 +119,7 @@ class HttpTimeoutTest : ClientLoader(timeout = 30.seconds) {
119119
}
120120

121121
@Test
122-
fun testGetWithCancellation() = clientTests(except(ENGINES_WITHOUT_REQUEST_TIMEOUT)) {
122+
fun testGetWithCancellation() = clientTests(except(ENGINES_WITHOUT_REQUEST_TIMEOUT), retries = 3) {
123123
config {
124124
install(HttpTimeout) {
125125
requestTimeoutMillis = 1000
@@ -212,13 +212,13 @@ class HttpTimeoutTest : ClientLoader(timeout = 30.seconds) {
212212
@Test
213213
fun testGetRequestTimeoutWithSeparateReceive() = clientTests(except("Js"), retries = 5) {
214214
config {
215-
install(HttpTimeout) { requestTimeoutMillis = 1000 }
215+
install(HttpTimeout) { requestTimeoutMillis = 3000 }
216216
}
217217

218218
test { client ->
219219
val response = client.prepareRequest("$TEST_URL/with-stream") {
220220
method = HttpMethod.Get
221-
parameter("delay", 500)
221+
parameter("delay", 1500)
222222
}.body<ByteReadChannel>()
223223

224224
assertFailsWith<CancellationException> {
@@ -229,7 +229,8 @@ class HttpTimeoutTest : ClientLoader(timeout = 30.seconds) {
229229

230230
@Test
231231
fun testGetRequestTimeoutWithSeparateReceivePerRequestAttributes() = clientTests(
232-
except(ENGINES_WITHOUT_REQUEST_TIMEOUT, "Js", "Darwin", "DarwinLegacy")
232+
except(ENGINES_WITHOUT_REQUEST_TIMEOUT, "Js", "Darwin", "DarwinLegacy"),
233+
retries = 3,
233234
) {
234235
config {
235236
install(HttpTimeout)
@@ -481,7 +482,7 @@ class HttpTimeoutTest : ClientLoader(timeout = 30.seconds) {
481482
retries = 5,
482483
) {
483484
config {
484-
install(HttpTimeout) { socketTimeoutMillis = 500 }
485+
install(HttpTimeout) { socketTimeoutMillis = 1000 }
485486
}
486487

487488
test { client ->

‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/WebSocketBackpressureTest.kt‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -98,7 +98,7 @@ class WebSocketBackpressureTest : ClientLoader(except(ENGINES_WITHOUT_WS)) {
9898
assertTrue(it.isChannelOverflow, "Unexpected exception: $it")
9999
incomingChannelClosed.complete(Unit)
100100
}
101-
withTimeout(10.seconds) {
101+
withTimeout(30.seconds) {
102102
incomingChannelClosed.await()
103103
}
104104
close()

‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/WebSocketTest.kt‎

Lines changed: 8 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -395,7 +395,7 @@ class WebSocketTest : ClientLoader(except(ENGINES_WITHOUT_WS)) {
395395
}
396396

397397
@Test
398-
fun testAuthenticationWithValidRefreshToken() = clientTests(except("Js", "WinHttp")) {
398+
fun testAuthenticationWithValidRefreshToken() = clientTests(except("Js", "WinHttp"), retries = 5) {
399399
config {
400400
install(WebSockets)
401401

@@ -438,7 +438,7 @@ class WebSocketTest : ClientLoader(except(ENGINES_WITHOUT_WS)) {
438438
}
439439

440440
@Test
441-
fun testAuthenticationWithInvalidToken() = clientTests(except("Js", "WinHttp")) {
441+
fun testAuthenticationWithInvalidToken() = clientTests(except("Js", "WinHttp"), retries = 5) {
442442
config {
443443
install(WebSockets)
444444

@@ -568,15 +568,15 @@ class WebSocketTest : ClientLoader(except(ENGINES_WITHOUT_WS)) {
568568
install(WebSockets) {
569569
maxFrameSize = 10
570570
}
571+
}
571572

572-
test { client ->
573-
val exception = assertFailsWith<WebSocketException> {
574-
client.webSocket("$TEST_WEBSOCKET_SERVER/websockets/echo") {
575-
fail("Unreachable")
576-
}
573+
test { client ->
574+
val exception = assertFailsWith<WebSocketException> {
575+
client.webSocket("$TEST_WEBSOCKET_SERVER/websockets/echo") {
576+
fail("Unreachable")
577577
}
578-
assertContains(exception.message!!, "Max frame size switch is not supported")
579578
}
579+
assertContains(exception.message!!, "Max frame size switch is not supported")
580580
}
581581
}
582582

‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/plugins/CacheLegacyStorageTest.kt‎

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -377,7 +377,7 @@ class CacheLegacyStorageTest : ClientLoader() {
377377
}
378378

379379
@Test
380-
fun testMaxStale() = clientTests {
380+
fun testMaxStale() = clientTests(retries = 3) {
381381
val publicStorage = HttpCacheStorage.Unlimited()
382382
val privateStorage = HttpCacheStorage.Unlimited()
383383
config {
@@ -519,7 +519,7 @@ class CacheLegacyStorageTest : ClientLoader() {
519519
}
520520

521521
test { client ->
522-
val now = GMTDate() + 2000L
522+
val now = GMTDate() + 4000L
523523
val url = Url("$TEST_SERVER/cache/expires")
524524

525525
suspend fun getWithHeader(expires: String): String {
@@ -538,7 +538,7 @@ class CacheLegacyStorageTest : ClientLoader() {
538538
val second = client.get(url).body<String>()
539539

540540
assertEquals(first, second)
541-
delay(2500)
541+
delay(5000)
542542

543543
// now it should be already expired
544544
val third = client.get(url).body<String>()

‎ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/plugins/CookiesIntegrationTests.kt‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -55,7 +55,7 @@ class CookiesIntegrationTests : ClientLoader() {
5555
}
5656

5757
@Test
58-
fun testExpiration() = clientTests(except("Js")) {
58+
fun testExpiration() = clientTests(except("Js"), retries = 3) {
5959
config {
6060
install(HttpCookies) {
6161
default {

‎ktor-network/common/test/io/ktor/network/sockets/tests/TCPSocketTest.kt‎

Lines changed: 10 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -208,15 +208,14 @@ class TCPSocketTest {
208208
.bind(InetSocketAddress("127.0.0.1", 0))
209209

210210
val acceptJob = launch {
211-
// The accept call should fail with IOException/PosixException because the socket was closed,
211+
// The accept call should fail with IOException because the socket was closed,
212212
// but it must not be a bad descriptor error caused by closed descriptor in select call.
213-
try {
213+
val exception = assertFailsWith<IOException> {
214214
socket.accept()
215-
} catch (exception: IOException) {
216-
assertFalse("Bad descriptor" in exception.message.orEmpty())
217-
} catch (exception: Exception) {
218-
assertTrue(exception.isPosixException())
219215
}
216+
val containsBadDescriptor = generateSequence(exception as Throwable?) { it.cause }
217+
.any { "Bad descriptor" in it.message.orEmpty() }
218+
assertFalse(containsBadDescriptor)
220219
}
221220
delay(100) // Make sure socket is awaiting connection using ACCEPT
222221

@@ -237,7 +236,9 @@ class TCPSocketTest {
237236
val exception = assertFailsWith<IOException> {
238237
socket.accept()
239238
}
240-
assertFalse("Bad descriptor" in exception.message.orEmpty())
239+
val containsBadDescriptor = generateSequence(exception as Throwable?) { it.cause }
240+
.any { "Bad descriptor" in it.message.orEmpty() }
241+
assertFalse(containsBadDescriptor)
241242
}
242243

243244
socket.close()
@@ -268,7 +269,7 @@ class TCPSocketTest {
268269
val serverJob = launch {
269270
while (isActive) {
270271
ensureActive()
271-
serverSocket.accept()
272+
serverSocket.accept().close()
272273
}
273274
}
274275

@@ -278,7 +279,7 @@ class TCPSocketTest {
278279
socket.openWriteChannel(autoFlush = true)
279280

280281
try {
281-
withTimeout(500) {
282+
withTimeout(2000) {
282283
socket.close()
283284
socket.awaitClosed()
284285
}

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