Disable tests with real source of the time on Java's Windows to preve…

kotlinx-coroutines-core/common/test/JobTest.kt

@@ -103,11 +103,11 @@ class JobTest : TestBase() {
         }
         assertTrue(job.isActive)
         for (i in 0 until n) assertEquals(0, fireCount[i])
-        val tryCancel = Try { job.cancel() }
+        val cancelResult = runCatching { job.cancel() }
         assertTrue(!job.isActive)
         for (i in 0 until n) assertEquals(1, fireCount[i])
-        assertTrue(tryCancel.exception is CompletionHandlerException)
-        assertTrue(tryCancel.exception!!.cause is TestException)
+        assertTrue(cancelResult.exceptionOrNull() is CompletionHandlerException)
+        assertTrue(cancelResult.exceptionOrNull()!!.cause is TestException)
     }
 
     @Test

kotlinx-coroutines-core/common/test/TestBase.common.kt

@@ -104,3 +104,5 @@ class BadClass {
     override fun hashCode(): Int = error("hashCode")
     override fun toString(): String = error("toString")
 }
+
+public expect val isJavaAndWindows: Boolean

kotlinx-coroutines-core/common/test/WithTimeoutOrNullDurationTest.kt

@@ -131,6 +131,7 @@ class WithTimeoutOrNullDurationTest : TestBase() {
 
     @Test
     fun testOuterTimeout() = runTest {
+        if (isJavaAndWindows) return@runTest
         var counter = 0
         val result = withTimeoutOrNull(320.milliseconds) {
             while (true) {

kotlinx-coroutines-core/common/test/WithTimeoutOrNullTest.kt

@@ -128,6 +128,7 @@ class WithTimeoutOrNullTest : TestBase() {
 
     @Test
     fun testOuterTimeout() = runTest {
+        if (isJavaAndWindows) return@runTest
         var counter = 0
         val result = withTimeoutOrNull(320) {
             while (true) {

kotlinx-coroutines-core/js/test/TestBase.kt

@@ -138,3 +138,5 @@ public actual open class TestBase actual constructor() {
 
 private fun <T> Promise<T>.finally(block: () -> Unit): Promise<T> =
     then(onFulfilled = { value -> block(); value }, onRejected = { ex -> block(); throw ex })
+
+public actual val isJavaAndWindows: Boolean get() = false

kotlinx-coroutines-core/jvm/test/TestBase.kt

@@ -254,3 +254,10 @@ public actual open class TestBase(private var disableOutCheck: Boolean)  {
 
     protected suspend fun currentDispatcher() = coroutineContext[ContinuationInterceptor]!!
 }
+
+/*
+ * We ignore tests that test **real** non-virtualized tests with time on Windows, because
+ * our CI Windows is virtualized itself (oh, the irony) and its clock resolution is dozens of ms,
+ * which makes such tests flaky.
+ */
+public actual val isJavaAndWindows: Boolean = System.getProperty("os.name")!!.contains("Windows")

kotlinx-coroutines-core/native/test/TestBase.kt

@@ -107,3 +107,5 @@ public actual open class TestBase actual constructor() {
             error("Too few unhandled exceptions $exCount, expected ${unhandled.size}")
     }
 }
+
+public actual val isJavaAndWindows: Boolean get() = false