Propertly handle null in StringToCollectionConverter (#19481)

Change-Id: I9a01528910c5f9ec830e236fd8acd78dda763f24

1 files changed, 15 insertions, 0 deletions

diff --git a/server/tests/src/com/vaadin/tests/data/converter/StringToCollectionConverterTest.java b/server/tests/src/com/vaadin/tests/data/converter/StringToCollectionConverterTest.java
index bcd0dc15bd..4f2dc1df81 100644
--- a/server/tests/src/com/vaadin/tests/data/converter/StringToCollectionConverterTest.java
+++ b/server/tests/src/com/vaadin/tests/data/converter/StringToCollectionConverterTest.java
@@ -22,6 +22,7 @@ import java.util.EnumSet;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
 import java.util.Set;
 import java.util.Vector;
 
@@ -151,6 +152,20 @@ public class StringToCollectionConverterTest {
                 iterator.hasNext());
     }
 
+    @Test
+    public void convertToModel_null() {
+        StringToCollectionConverter converter = new StringToCollectionConverter();
+        Assert.assertNull(converter.convertToModel(null, ArrayList.class,
+                Locale.ENGLISH));
+    }
+
+    @Test
+    public void convertToPresentation_null() {
+        StringToCollectionConverter converter = new StringToCollectionConverter();
+        Assert.assertNull(converter.convertToPresentation(null, String.class,
+                Locale.ENGLISH));
+    }
+
     public enum TestEnum {
         X, Y, Z;
     }