mirror of
https://github.com/InsanusMokrassar/MicroUtils.git
synced 2025-11-08 08:00:26 +00:00
improve SmartKeyRWLockerTests and fix SmartSemaphore
This commit is contained in:
@@ -72,7 +72,7 @@ sealed interface SmartSemaphore {
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acquiredPermits != checkedPermits
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}
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if (shouldContinue) {
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waitRelease()
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waitRelease(checkedPermits - acquiredPermits)
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}
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} while (shouldContinue && currentCoroutineContext().isActive)
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} catch (e: Throwable) {
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@@ -4,6 +4,7 @@ import kotlinx.coroutines.flow.first
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import kotlinx.coroutines.sync.Mutex
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import kotlinx.coroutines.sync.withLock
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import kotlinx.coroutines.test.runTest
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import kotlin.test.BeforeTest
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import kotlin.test.Test
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import kotlin.test.assertEquals
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import kotlin.test.assertFails
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@@ -13,184 +14,517 @@ import kotlin.time.Duration.Companion.milliseconds
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import kotlin.time.Duration.Companion.seconds
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class SmartKeyRWLockerTests {
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@Test
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fun writeLockKeyFailedOnGlobalWriteLockTest() = runTest {
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val locker = SmartKeyRWLocker<String>()
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val testKey = "test"
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locker.lockWrite()
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private lateinit var locker: SmartKeyRWLocker<String>
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assertTrue { locker.isWriteLocked() }
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assertFails {
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realWithTimeout(1.seconds) {
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locker.lockWrite(testKey)
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}
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}
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assertFalse { locker.isWriteLocked(testKey) }
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locker.unlockWrite()
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assertFalse { locker.isWriteLocked() }
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realWithTimeout(1.seconds) {
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locker.lockWrite(testKey)
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}
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assertTrue { locker.isWriteLocked(testKey) }
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assertTrue { locker.unlockWrite(testKey) }
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assertFalse { locker.isWriteLocked(testKey) }
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@BeforeTest
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fun setup() {
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locker = SmartKeyRWLocker()
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}
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// ==================== Global Read Tests ====================
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@Test
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fun writeLockKeyFailedOnGlobalReadLockTest() = runTest {
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val locker = SmartKeyRWLocker<String>()
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val testKey = "test"
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fun testGlobalReadAllowsMultipleConcurrentReads() = runTest {
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val results = mutableListOf<Boolean>()
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locker.acquireRead()
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assertEquals(Int.MAX_VALUE - 1, locker.readSemaphore().freePermits)
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assertFails {
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realWithTimeout(1.seconds) {
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locker.lockWrite(testKey)
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val jobs = List(5) {
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launch {
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locker.acquireRead()
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delay(100.milliseconds)
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results.add(true)
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locker.releaseRead()
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}
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}
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assertFalse { locker.isWriteLocked(testKey) }
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jobs.joinAll()
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locker.releaseRead()
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assertEquals(5, results.size)
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}
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@Test
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fun testGlobalReadBlocksGlobalWrite() = runTest {
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locker.acquireRead()
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var writeAcquired = false
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val writeJob = launch {
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locker.lockWrite()
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writeAcquired = true
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locker.unlockWrite()
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}
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delay(200.milliseconds)
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assertFalse(writeAcquired, "Write should be blocked by global read")
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locker.releaseRead()
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assertEquals(Int.MAX_VALUE, locker.readSemaphore().freePermits)
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writeJob.join()
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realWithTimeout(1.seconds) {
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locker.lockWrite(testKey)
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}
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assertTrue { locker.isWriteLocked(testKey) }
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assertTrue { locker.unlockWrite(testKey) }
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assertFalse { locker.isWriteLocked(testKey) }
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assertTrue(writeAcquired, "Write should succeed after read released")
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}
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@Test
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fun readLockFailedOnWriteLockKeyTest() = runTest {
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val locker = SmartKeyRWLocker<String>()
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val testKey = "test"
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locker.lockWrite(testKey)
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fun testGlobalReadBlocksAllKeyWrites() = runTest {
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locker.acquireRead()
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assertTrue { locker.isWriteLocked(testKey) }
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val writeFlags = mutableMapOf<String, Boolean>()
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val keys = listOf("key1", "key2", "key3")
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assertFails {
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realWithTimeout(1.seconds) {
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val jobs = keys.map { key ->
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launch {
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locker.lockWrite(key)
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writeFlags[key] = true
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locker.unlockWrite(key)
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}
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}
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delay(200.milliseconds)
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assertTrue(writeFlags.isEmpty(), "No writes should succeed while global read active")
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locker.releaseRead()
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jobs.joinAll()
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assertEquals(keys.size, writeFlags.size, "All writes should succeed after global read released")
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}
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// ==================== Global Write Tests ====================
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@Test
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fun testGlobalWriteBlocksAllOperations() = runTest {
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locker.lockWrite()
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var globalReadAcquired = false
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var keyReadAcquired = false
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var keyWriteAcquired = false
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val jobs = listOf(
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launch {
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locker.acquireRead()
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globalReadAcquired = true
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locker.releaseRead()
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},
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launch {
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locker.acquireRead("key1")
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keyReadAcquired = true
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locker.releaseRead("key1")
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},
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launch {
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locker.lockWrite("key2")
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keyWriteAcquired = true
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locker.unlockWrite("key2")
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}
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}
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assertEquals(locker.readSemaphore().maxPermits - 1, locker.readSemaphore().freePermits)
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)
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locker.unlockWrite(testKey)
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assertFalse { locker.isWriteLocked(testKey) }
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delay(200.milliseconds)
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assertFalse(globalReadAcquired, "Global read should be blocked")
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assertFalse(keyReadAcquired, "Key read should be blocked")
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assertFalse(keyWriteAcquired, "Key write should be blocked")
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realWithTimeout(1.seconds) {
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locker.acquireRead()
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}
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assertEquals(locker.readSemaphore().maxPermits - 1, locker.readSemaphore().freePermits)
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assertTrue { locker.releaseRead() }
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assertEquals(locker.readSemaphore().maxPermits, locker.readSemaphore().freePermits)
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locker.unlockWrite()
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jobs.joinAll()
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assertTrue(globalReadAcquired)
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assertTrue(keyReadAcquired)
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assertTrue(keyWriteAcquired)
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}
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@Test
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fun writeLockFailedOnWriteLockKeyTest() = runTest {
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val locker = SmartKeyRWLocker<String>()
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val testKey = "test"
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locker.lockWrite(testKey)
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fun testGlobalWriteIsExclusive() = runTest {
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locker.lockWrite()
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assertTrue { locker.isWriteLocked(testKey) }
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assertFails {
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realWithTimeout(1.seconds) {
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locker.lockWrite()
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}
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}
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assertFalse(locker.isWriteLocked())
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locker.unlockWrite(testKey)
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assertFalse { locker.isWriteLocked(testKey) }
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realWithTimeout(1.seconds) {
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var secondWriteAcquired = false
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val job = launch {
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locker.lockWrite()
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secondWriteAcquired = true
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locker.unlockWrite()
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}
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assertTrue(locker.isWriteLocked())
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assertTrue { locker.unlockWrite() }
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assertFalse(locker.isWriteLocked())
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delay(200.milliseconds)
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assertFalse(secondWriteAcquired, "Second global write should be blocked")
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locker.unlockWrite()
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job.join()
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assertTrue(secondWriteAcquired)
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}
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// ==================== Key Read Tests ====================
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@Test
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fun readsBlockingGlobalWrite() = runTest {
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val locker = SmartKeyRWLocker<String>()
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fun testKeyReadAllowsMultipleConcurrentReadsForSameKey() = runTest {
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val key = "testKey"
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val results = mutableListOf<Boolean>()
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val testKeys = (0 until 100).map { "test$it" }
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locker.acquireRead(key)
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for (i in testKeys.indices) {
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val it = testKeys[i]
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locker.acquireRead(it)
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val previous = testKeys.take(i)
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val next = testKeys.drop(i + 1)
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previous.forEach {
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assertTrue { locker.readSemaphoreOrNull(it) ?.freePermits == Int.MAX_VALUE - 1 }
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}
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next.forEach {
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assertTrue { locker.readSemaphoreOrNull(it) ?.freePermits == null }
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val jobs = List(5) {
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launch {
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locker.acquireRead(key)
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delay(50.milliseconds)
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results.add(true)
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locker.releaseRead(key)
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}
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}
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for (i in testKeys.indices) {
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val it = testKeys[i]
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assertFails {
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realWithTimeout(13.milliseconds) { locker.lockWrite() }
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jobs.joinAll()
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locker.releaseRead(key)
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assertEquals(5, results.size)
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}
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@Test
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fun testKeyReadAllowsReadsForDifferentKeys() = runTest {
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val results = mutableMapOf<String, Boolean>()
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locker.acquireRead("key1")
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val jobs = listOf("key2", "key3", "key4").map { key ->
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launch {
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locker.acquireRead(key)
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delay(50.milliseconds)
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results[key] = true
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locker.releaseRead(key)
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}
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val readPermitsBeforeLock = locker.readSemaphore().freePermits
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realWithTimeout(1.seconds) { locker.acquireRead() }
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}
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jobs.joinAll()
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locker.releaseRead("key1")
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assertEquals(3, results.size)
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}
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@Test
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fun testKeyReadBlocksWriteForSameKey() = runTest {
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val key = "testKey"
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locker.acquireRead(key)
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var writeAcquired = false
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val job = launch {
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locker.lockWrite(key)
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writeAcquired = true
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locker.unlockWrite(key)
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}
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delay(200.milliseconds)
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assertFalse(writeAcquired, "Write for same key should be blocked")
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locker.releaseRead(key)
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job.join()
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assertTrue(writeAcquired)
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}
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@Test
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fun testKeyReadBlocksGlobalWrite() = runTest {
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locker.acquireRead("key1")
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var globalWriteAcquired = false
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val job = launch {
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locker.lockWrite()
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globalWriteAcquired = true
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locker.unlockWrite()
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}
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delay(200.milliseconds)
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assertFalse(globalWriteAcquired, "Global write should be blocked by key read")
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locker.releaseRead("key1")
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job.join()
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assertTrue(globalWriteAcquired)
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}
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@Test
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fun testKeyReadAllowsWriteForDifferentKey() = runTest {
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locker.acquireRead("key1")
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var writeAcquired = false
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val job = launch {
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locker.lockWrite("key2")
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writeAcquired = true
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locker.unlockWrite("key2")
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}
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job.join()
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assertTrue(writeAcquired, "Write for different key should succeed")
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locker.releaseRead("key1")
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}
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// ==================== Key Write Tests ====================
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@Test
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fun testKeyWriteBlocksReadForSameKey() = runTest {
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val key = "testKey"
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locker.lockWrite(key)
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var readAcquired = false
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val job = launch {
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locker.acquireRead(key)
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readAcquired = true
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locker.releaseRead(key)
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}
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delay(200.milliseconds)
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assertFalse(readAcquired, "Read for same key should be blocked")
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locker.unlockWrite(key)
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job.join()
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assertTrue(readAcquired)
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}
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@Test
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fun testKeyWriteBlocksGlobalRead() = runTest {
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locker.lockWrite("key1")
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var globalReadAcquired = false
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val job = launch {
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locker.acquireRead()
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globalReadAcquired = true
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locker.releaseRead()
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assertEquals(readPermitsBeforeLock, locker.readSemaphore().freePermits)
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locker.releaseRead(it)
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}
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assertTrue { locker.readSemaphore().freePermits == Int.MAX_VALUE }
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realWithTimeout(1.seconds) { locker.lockWrite() }
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assertFails {
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realWithTimeout(13.milliseconds) { locker.acquireRead() }
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}
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assertTrue { locker.unlockWrite() }
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assertTrue { locker.readSemaphore().freePermits == Int.MAX_VALUE }
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delay(200.milliseconds)
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assertFalse(globalReadAcquired, "Global read should be blocked by key write")
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locker.unlockWrite("key1")
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job.join()
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assertTrue(globalReadAcquired)
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}
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@Test
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fun writesBlockingGlobalWrite() = runTest {
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val locker = SmartKeyRWLocker<String>()
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fun testKeyWriteIsExclusiveForSameKey() = runTest {
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val key = "testKey"
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locker.lockWrite(key)
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val testKeys = (0 until 100).map { "test$it" }
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var secondWriteAcquired = false
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val job = launch {
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locker.lockWrite(key)
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secondWriteAcquired = true
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locker.unlockWrite(key)
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}
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for (i in testKeys.indices) {
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val it = testKeys[i]
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locker.lockWrite(it)
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val previous = testKeys.take(i)
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val next = testKeys.drop(i + 1)
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delay(200.milliseconds)
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assertFalse(secondWriteAcquired, "Second write for same key should be blocked")
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previous.forEach {
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assertTrue { locker.writeMutexOrNull(it) ?.isLocked == true }
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locker.unlockWrite(key)
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job.join()
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assertTrue(secondWriteAcquired)
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}
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@Test
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fun testKeyWriteAllowsOperationsOnDifferentKeys() = runTest {
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locker.lockWrite("key1")
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val results = mutableMapOf<String, Boolean>()
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val jobs = listOf(
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launch {
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locker.acquireRead("key2")
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results["read-key2"] = true
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locker.releaseRead("key2")
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},
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launch {
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locker.lockWrite("key3")
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results["write-key3"] = true
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locker.unlockWrite("key3")
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}
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next.forEach {
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assertTrue { locker.writeMutexOrNull(it) ?.isLocked != true }
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)
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jobs.joinAll()
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assertEquals(2, results.size, "Operations on different keys should succeed")
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locker.unlockWrite("key1")
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}
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// ==================== Complex Scenarios ====================
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@Test
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fun testMultipleReadersThenWriter() = runTest {
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val key = "testKey"
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val readCount = 5
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val readers = mutableListOf<Job>()
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repeat(readCount) {
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readers.add(launch {
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locker.acquireRead(key)
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delay(100.milliseconds)
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locker.releaseRead(key)
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})
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}
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delay(50.milliseconds) // Let readers acquire
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var writerExecuted = false
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val writer = launch {
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locker.lockWrite(key)
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writerExecuted = true
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locker.unlockWrite(key)
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}
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delay(50.milliseconds)
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assertFalse(writerExecuted, "Writer should wait for all readers")
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readers.joinAll()
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writer.join()
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assertTrue(writerExecuted, "Writer should execute after all readers done")
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}
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@Test
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fun testWriterThenMultipleReaders() = runTest {
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val key = "testKey"
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locker.lockWrite(key)
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val readerFlags = mutableListOf<Boolean>()
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val readers = List(5) {
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launch {
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locker.acquireRead(key)
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readerFlags.add(true)
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locker.releaseRead(key)
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}
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}
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for (i in testKeys.indices) {
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val it = testKeys[i]
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assertFails { realWithTimeout(13.milliseconds) { locker.lockWrite() } }
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delay(200.milliseconds)
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assertTrue(readerFlags.isEmpty(), "Readers should be blocked by writer")
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val readPermitsBeforeLock = locker.readSemaphore().freePermits
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assertFails { realWithTimeout(13.milliseconds) { locker.acquireRead() } }
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assertEquals(readPermitsBeforeLock, locker.readSemaphore().freePermits)
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locker.unlockWrite(key)
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readers.joinAll()
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locker.unlockWrite(it)
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assertEquals(5, readerFlags.size, "All readers should succeed after writer")
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}
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@Test
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fun testCascadingLocksWithDifferentKeys() = runTest {
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val executed = mutableMapOf<String, Boolean>()
|
||||
|
||||
launch {
|
||||
locker.lockWrite("key1")
|
||||
executed["write-key1-start"] = true
|
||||
delay(100.milliseconds)
|
||||
locker.unlockWrite("key1")
|
||||
executed["write-key1-end"] = true
|
||||
}
|
||||
|
||||
assertTrue { locker.readSemaphore().freePermits == Int.MAX_VALUE }
|
||||
realWithTimeout(1.seconds) { locker.lockWrite() }
|
||||
assertFails {
|
||||
realWithTimeout(13.milliseconds) { locker.acquireRead() }
|
||||
delay(50.milliseconds)
|
||||
|
||||
launch {
|
||||
locker.acquireRead("key2")
|
||||
executed["read-key2"] = true
|
||||
delay(100.milliseconds)
|
||||
locker.releaseRead("key2")
|
||||
}
|
||||
assertTrue { locker.unlockWrite() }
|
||||
assertTrue { locker.readSemaphore().freePermits == Int.MAX_VALUE }
|
||||
|
||||
delay(200.milliseconds)
|
||||
|
||||
assertTrue(executed["write-key1-start"] == true)
|
||||
assertTrue(executed["read-key2"] == true)
|
||||
assertTrue(executed["write-key1-end"] == true)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testReleaseWithoutAcquireReturnsFalse() = runTest {
|
||||
assertFalse(locker.releaseRead(), "Release without acquire should return false")
|
||||
assertFalse(locker.releaseRead("key1"), "Release without acquire should return false")
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testUnlockWithoutLockReturnsFalse() = runTest {
|
||||
assertFalse(locker.unlockWrite(), "Unlock without lock should return false")
|
||||
assertFalse(locker.unlockWrite("key1"), "Unlock without lock should return false")
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testProperReleaseReturnsTrue() = runTest {
|
||||
locker.acquireRead()
|
||||
assertTrue(locker.releaseRead(), "Release after acquire should return true")
|
||||
|
||||
locker.acquireRead("key1")
|
||||
assertTrue(locker.releaseRead("key1"), "Release after acquire should return true")
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testProperUnlockReturnsTrue() = runTest {
|
||||
locker.lockWrite()
|
||||
assertTrue(locker.unlockWrite(), "Unlock after lock should return true")
|
||||
|
||||
locker.lockWrite("key1")
|
||||
assertTrue(locker.unlockWrite("key1"), "Unlock after lock should return true")
|
||||
}
|
||||
|
||||
// ==================== Stress Tests ====================
|
||||
|
||||
@Test
|
||||
fun stressTestWithMixedOperations() = runTest(timeout = 10.seconds) {
|
||||
val operations = 100
|
||||
val keys = listOf("key1", "key2", "key3", "key4", "key5")
|
||||
val jobs = mutableListOf<Job>()
|
||||
|
||||
repeat(operations) { i ->
|
||||
val key = keys[i % keys.size]
|
||||
|
||||
when (i % 4) {
|
||||
0 -> jobs.add(launch {
|
||||
locker.acquireRead(key)
|
||||
delay(10.milliseconds)
|
||||
locker.releaseRead(key)
|
||||
})
|
||||
1 -> jobs.add(launch {
|
||||
locker.lockWrite(key)
|
||||
delay(10.milliseconds)
|
||||
locker.unlockWrite(key)
|
||||
})
|
||||
2 -> jobs.add(launch {
|
||||
locker.acquireRead()
|
||||
delay(10.milliseconds)
|
||||
locker.releaseRead()
|
||||
})
|
||||
3 -> jobs.add(launch {
|
||||
locker.lockWrite()
|
||||
delay(10.milliseconds)
|
||||
locker.unlockWrite()
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
jobs.joinAll()
|
||||
// If we reach here without deadlock or exceptions, test passes
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testFairnessReadersDontStarveWriters() = runTest(timeout = 5.seconds) {
|
||||
val key = "testKey"
|
||||
var writerExecuted = false
|
||||
|
||||
// Start continuous readers
|
||||
val readers = List(10) {
|
||||
launch {
|
||||
repeat(5) {
|
||||
locker.acquireRead(key)
|
||||
delay(50.milliseconds)
|
||||
locker.releaseRead(key)
|
||||
delay(10.milliseconds)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
delay(100.milliseconds)
|
||||
|
||||
// Try to acquire write lock
|
||||
val writer = launch {
|
||||
locker.lockWrite(key)
|
||||
writerExecuted = true
|
||||
locker.unlockWrite(key)
|
||||
}
|
||||
|
||||
readers.joinAll()
|
||||
writer.join()
|
||||
|
||||
assertTrue(writerExecuted, "Writer should eventually execute")
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user