From f3d9d21757c24bb8155653363f5e0abebd8a59cc Mon Sep 17 00:00:00 2001
From: Zalim Bashorov <Zalim.Bashorov@jetbrains.com>
Date: Tue, 21 Oct 2014 19:28:17 +0400
Subject: [PATCH] Added regression tests for KT-3518 Null pointer during null
 comparison in JS Backend.

---
 .../jetbrains/k2js/test/semantics/EqualsTest.java  |  4 ++++
 .../equals/cases/compareNullableListWithNull.kt    | 14 ++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 js/js.translator/testData/expression/equals/cases/compareNullableListWithNull.kt

diff --git a/js/js.tests/test/org/jetbrains/k2js/test/semantics/EqualsTest.java b/js/js.tests/test/org/jetbrains/k2js/test/semantics/EqualsTest.java
index 30e5d8da47e..07c0d5e8776 100644
--- a/js/js.tests/test/org/jetbrains/k2js/test/semantics/EqualsTest.java
+++ b/js/js.tests/test/org/jetbrains/k2js/test/semantics/EqualsTest.java
@@ -49,4 +49,8 @@ public final class EqualsTest extends AbstractExpressionTest {
     public void testEqualsNullOrUndefined() throws Exception {
         checkFooBoxIsOk();
     }
+
+    public void testCompareNullableListWithNull() throws Exception {
+        checkFooBoxIsOk();
+    }
 }
\ No newline at end of file
diff --git a/js/js.translator/testData/expression/equals/cases/compareNullableListWithNull.kt b/js/js.translator/testData/expression/equals/cases/compareNullableListWithNull.kt
new file mode 100644
index 00000000000..14214dc1c0d
--- /dev/null
+++ b/js/js.translator/testData/expression/equals/cases/compareNullableListWithNull.kt
@@ -0,0 +1,14 @@
+// KT-3518 Null pointer during null comparison in JS Backend
+package foo
+
+class MyClazz(val nullableL : List<String>?)
+
+fun box(): String {
+    val a = MyClazz(null)
+    if(a.nullableL != null) return "a.nullableL != null"
+
+    val b = MyClazz(listOf("somthing"))
+    if(b.nullableL == null) return "b.nullableL == null"
+
+    return "OK"
+}
\ No newline at end of file