1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.graph.test.matchers;
  24 
  25 import org.hamcrest.Description;
  26 import org.hamcrest.TypeSafeDiagnosingMatcher;
  27 
  28 import org.graalvm.compiler.graph.iterators.NodeIterable;
  29 
  30 public class NodeIterableCount extends TypeSafeDiagnosingMatcher<NodeIterable<?>> {
  31     private int count;
  32 
  33     public NodeIterableCount(int count) {
  34         this.count = count;
  35     }
  36 
  37     @Override
  38     public void describeTo(Description description) {
  39         description.appendText("is a NodeIterable containing ").appendValue(count).appendText(" elements");
  40     }
  41 
  42     public static NodeIterableCount hasCount(int count) {
  43         return new NodeIterableCount(count);
  44     }
  45 
  46     @Override
  47     protected boolean matchesSafely(NodeIterable<?> iterable, Description mismatchDescription) {
  48         mismatchDescription.appendText("is a NodeIterable containing ").appendValue(iterable.count()).appendText(" elements");
  49         return iterable.count() == count;
  50     }
  51 }