1 /* 2 * Copyright (c) 2014, 2018, 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 24 25 package org.graalvm.compiler.graph.test.matchers; 26 27 import org.hamcrest.Description; 28 import org.hamcrest.Matcher; 29 import org.hamcrest.TypeSafeDiagnosingMatcher; 30 import org.hamcrest.core.IsNot; 31 32 import org.graalvm.compiler.graph.iterators.NodeIterable; 33 34 public class NodeIterableIsEmpty extends TypeSafeDiagnosingMatcher<NodeIterable<?>> { 35 36 private static final NodeIterableIsEmpty INSTANCE = new NodeIterableIsEmpty(); 37 38 @Override 39 public boolean matchesSafely(NodeIterable<?> iterable, Description mismatchDescription) { 40 mismatchDescription.appendText("is a non-empty NodeIterable"); 41 return iterable.isEmpty(); 42 } 43 44 @Override 45 public void describeTo(Description description) { 46 description.appendText("is an empty NodeIterable"); 47 } 48 49 public static Matcher<NodeIterable<?>> isEmpty() { 50 return INSTANCE; 51 } 52 53 public static Matcher<NodeIterable<?>> isNotEmpty() { 54 return IsNot.not(INSTANCE); 55 } 56 }