node: Add clock test for external interrupt on waiting strand

node/src/test/kotlin/com/r3corda/node/utilities/ClockUtilsTest.kt

@@ -16,6 +16,7 @@ import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
 import kotlin.test.assertFalse
 import kotlin.test.assertTrue
+import kotlin.test.fail
 
 class ClockUtilsTest {
 
@@ -112,6 +113,27 @@ class ClockUtilsTest {
         assertFalse(testClock.awaitWithDeadline(advancedClock.instant(), future), "Should have reached deadline")
     }
 
+    @Test
+    fun `test external interrupt of a clock future`() {
+        val mainStrand = Strand.currentStrand()
+        executor.execute @Suspendable {
+            // Wait until main thread is waiting
+            while (mainStrand.state != Strand.State.TIMED_WAITING) {
+                Strand.sleep(1)
+            }
+            mainStrand.interrupt()
+        }
+
+        val testClock = TestClock(stoppedClock)
+        val advancedClock = Clock.offset(stoppedClock, Duration.ofHours(10))
+
+        try {
+            testClock.awaitWithDeadline(advancedClock.instant(), SettableFuture.create<Boolean>())
+            fail("Expected InterruptedException")
+        } catch (exception: InterruptedException) {
+        }
+    }
+
     /**
      * If this test seems to hang and throw an NPE, then likely that quasar suspendables scanner has not been
      * run on core module (in IntelliJ, open gradle side tab and run: