Add tests for runBlocking with LimitedDispatcher

Author: vsalavatov

kotlinx-coroutines-core/jvm/test/scheduling/RunBlockingLimitedDispatcherLivenessStressTest.kt

@@ -0,0 +1,33 @@
+package scheduling
+
+import kotlinx.coroutines.testing.*
+import org.junit.*
+import org.junit.runner.*
+import org.junit.runners.*
+
+@RunWith(Parameterized::class)
+class RunBlockingLimitedDispatcherLivenessStressTest(private val yieldMask: Int) : RunBlockingCoroutineSchedulerLivenessTestBase() {
+    init {
+        corePoolSize = 1
+    }
+
+    companion object {
+        @JvmStatic
+        @Parameterized.Parameters
+        fun data(): Array<Array<Any?>> {
+            return Array(32 * stressTestMultiplierSqrt) { arrayOf(it) }
+        }
+    }
+
+    @Test
+    fun testLivenessOfLimitedDispatcherOnTopOfDefaultDispatcher() =
+        testSchedulerLiveness(dispatcher.limitedParallelism(1), yieldMask)
+
+    @Test
+    fun testLivenessOfLimitedDispatcherOnTopOfIoDispatcher() = testSchedulerLiveness(
+        // Important: inner limitedDispatcher will be on top of this LimitedDispatcher, so there are two Workers from
+        // two different LimitedDispatchers that must coordinate their permits, not just one.
+        // In other words, LimitedDispatcher's Worker should also respect BlockingDispatchAware on its inner tasks
+        blockingDispatcher.value.limitedParallelism(1), yieldMask
+    )
+}