JAL-2154 check alignment isn’t null before validating

diff --git a/test/jalview/datamodel/AlignmentTest.java b/test/jalview/datamodel/AlignmentTest.java
index 09645fd..d3525a5 100644 (file)
--- a/test/jalview/datamodel/AlignmentTest.java
+++ b/test/jalview/datamodel/AlignmentTest.java
@@ -115,6 +115,14 @@ public class AlignmentTest
   public static boolean verifyAlignmentDatasetRefs(AlignmentI alignment,
           boolean raiseAssert)
   {
+    if (alignment == null)
+    {
+      if (raiseAssert)
+      {
+        Assert.fail("Alignment for verification was null.");
+      }
+      return false;
+    }
     if (alignment.getDataset() != null)
     {
       AlignmentI dataset = alignment.getDataset();