1.1 --- a/openide.util/test/unit/src/org/openide/util/test/MockChangeListener.java	Wed May 16 19:38:36 2007 +0000
     1.2 +++ b/openide.util/test/unit/src/org/openide/util/test/MockChangeListener.java	Wed May 30 11:03:33 2007 +0000
     1.3 @@ -48,12 +48,13 @@
     1.4       * Specifies a failure message to use for the next assertion.
     1.5       * @return this object, for convenient chaining
     1.6       */
     1.7 -    public MockChangeListener msg(String msg) {
     1.8 +    public synchronized MockChangeListener msg(String msg) {
     1.9          this.msg = msg;
    1.10          return this;
    1.11      }
    1.12  
    1.13      private String compose(String msg) {
    1.14 +        assert Thread.holdsLock(this);
    1.15          return this.msg == null ? msg : msg + ": " + this.msg;
    1.16      }
    1.17