From 84327d06c10e4a5c6f4a1efc8235864d03eaa466 Mon Sep 17 00:00:00 2001
From: James Strachan <james.strachan@gmail.com>
Date: Tue, 28 Feb 2012 09:08:39 +0000
Subject: [PATCH] added a demonstration of how Kotlin currently handles
 nullable collections on for loops - by throwing NPEs

---
 .../stdlib/testall/LanguageTestAllTest.java   | 28 +++++++++++++++++++
 .../test/language/NullableCollectionsTest.kt  | 20 +++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 runtests/test/stdlib/testall/LanguageTestAllTest.java
 create mode 100644 testlib/test/language/NullableCollectionsTest.kt

diff --git a/runtests/test/stdlib/testall/LanguageTestAllTest.java b/runtests/test/stdlib/testall/LanguageTestAllTest.java
new file mode 100644
index 00000000000..3e4371e8e9e
--- /dev/null
+++ b/runtests/test/stdlib/testall/LanguageTestAllTest.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2010-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package stdlib.testall;
+
+import junit.framework.TestSuite;
+import test.language.*;
+
+/**
+ */
+public class LanguageTestAllTest {
+  public static TestSuite suite() {
+    return new TestSuite(NullableCollectionsTest.class);
+  }
+}
diff --git a/testlib/test/language/NullableCollectionsTest.kt b/testlib/test/language/NullableCollectionsTest.kt
new file mode 100644
index 00000000000..213ce88cd56
--- /dev/null
+++ b/testlib/test/language/NullableCollectionsTest.kt
@@ -0,0 +1,20 @@
+package test.language
+
+import junit.framework.TestCase
+import java.util.Collection
+import stdhack.test.*
+
+class NullableCollectionsTest : TestCase() {
+
+    fun testIterateOverNullCollectionsThrowsNPE() {
+        val c: Collection<String>? = null
+
+        // TODO currently this will throw a NPE
+        // should it either be a compile error or handle nulls gracefully?
+        failsWith<NullPointerException> {
+            for (e in c) {
+                println("Hey got $e")
+            }
+        }
+    }
+}