1 files changed, 47 insertions, 0 deletions
diff --git a/kotlinx-coroutines-core/common/test/CoroutineExceptionHandlerTest.kt b/kotlinx-coroutines-core/common/test/CoroutineExceptionHandlerTest.kt
new file mode 100644
index 00000000..95e93664
--- /dev/null
+++ b/kotlinx-coroutines-core/common/test/CoroutineExceptionHandlerTest.kt
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package kotlinx.coroutines
+
+import kotlin.test.*
+
+class CoroutineExceptionHandlerTest : TestBase() {
+    // Parent Job() does not handle exception --> handler is invoked on child crash
+    @Test
+    fun testJob() = runTest {
+        expect(1)
+        var coroutineException: Throwable? = null
+        val handler = CoroutineExceptionHandler { _, ex ->
+            coroutineException = ex
+            expect(3)
+        }
+        val parent = Job()
+        val job = launch(handler + parent) {
+            throw TestException()
+        }
+        expect(2)
+        job.join()
+        finish(4)
+        assertTrue(coroutineException is TestException)
+        assertTrue(parent.isCancelled)
+    }
+
+    // Parent CompletableDeferred() "handles" exception --> handler is NOT invoked on child crash
+    @Test
+    fun testCompletableDeferred() = runTest {
+        expect(1)
+        val handler = CoroutineExceptionHandler { _, _ ->
+            expectUnreached()
+        }
+        val parent = CompletableDeferred<Unit>()
+        val job = launch(handler + parent) {
+            throw TestException()
+        }
+        expect(2)
+        job.join()
+        finish(3)
+        assertTrue(parent.isCancelled)
+        assertTrue(parent.getCompletionExceptionOrNull() is TestException)
+    }
+}