Message is empty string rather than null.

johnmay · egonw · commit 4acb6e31c976 · 2021-12-18T10:07:39.000+01:00
diff --git a/storage/inchi/src/test/java/org/openscience/cdk/inchi/InChIGeneratorTest.java b/storage/inchi/src/test/java/org/openscience/cdk/inchi/InChIGeneratorTest.java
@@ -120,7 +120,9 @@ public void testGetMessage() throws Exception {
         IAtomContainer ac = new AtomContainer();
         ac.addAtom(new Atom("Cl"));
         InChIGenerator gen = getFactory().getInChIGenerator(ac, "FixedH");
-        Assert.assertNull("Because this generation should work, I expected a null message String.", gen.getMessage());
+        Assert.assertEquals(
+                "Because this generation should work, I expected an empty message String.",
+                "", gen.getMessage());
     }
 
     @Test
