56 lines
1.7 KiB
Kotlin
56 lines
1.7 KiB
Kotlin
/*
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* Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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/*
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* Focused regression test for local variable visibility across suspension inside withLock { }
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*/
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import kotlinx.coroutines.test.runTest
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import net.sergeych.lyng.eval
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import kotlin.test.Test
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class ParallelLocalScopeTest {
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@Test
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fun localsSurviveSuspensionInsideWithLock() = runTest {
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// Minimal reproduction of the pattern used in ScriptTest.testParallels2
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eval(
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"""
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class AtomicCounter {
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private val m = Mutex()
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private var counter = 0
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fun increment() {
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m.withLock {
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val a = counter
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delay(1)
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counter = a + 1
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}
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}
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fun getCounter() { counter }
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}
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val ac = AtomicCounter()
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// Single-threaded increments should work if locals survive after delay
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for (i in 1..3) ac.increment()
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assertEquals(3, ac.getCounter())
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""".trimIndent()
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)
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}
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}
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