From 209d72faec7f2ff23c7d46d0e4c41faaab48d2c1 Mon Sep 17 00:00:00 2001
From: Volker Berlin <volker.berlin@googlemail.com>
Date: Mon, 1 Apr 2019 21:34:55 +0200
Subject: [PATCH] test NPE

---
 .../jwebassembly/SampleCompileTest.java           | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/test/de/inetsoftware/jwebassembly/SampleCompileTest.java b/test/de/inetsoftware/jwebassembly/SampleCompileTest.java
index 6760f35..8f09705 100644
--- a/test/de/inetsoftware/jwebassembly/SampleCompileTest.java
+++ b/test/de/inetsoftware/jwebassembly/SampleCompileTest.java
@@ -18,6 +18,7 @@ package de.inetsoftware.jwebassembly;
 import static org.junit.Assert.*;
 
 import java.io.File;
+import java.io.OutputStream;
 import java.net.URL;
 import java.nio.file.Files;
 import java.util.ArrayList;
@@ -88,6 +89,20 @@ public class SampleCompileTest {
         assertArrayEquals( expected, actual );
     }
 
+    @Test
+    public void npe() throws Exception {
+        JWebAssembly webAsm = new JWebAssembly();
+        webAsm.addFile( classFile );
+        try {
+            webAsm.compileToBinary( (OutputStream)null );
+            fail();
+        } catch( WasmException ex ) {
+            // expected
+            assertTrue( "" + ex.getCause(), ex.getCause() instanceof NullPointerException );
+        }
+    }
+
+
 //    @Test
 //    public void compileToBinary() throws Exception {
 //        URL url = SampleCompileTest.class.getResource( "samples/" + testName + ".wasm" );