/*
* Copyright (C) 2011 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.collect;
import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.BstTesting.SimpleNode;
import junit.framework.TestCase;
/**
* Simple tests for {@code BstPath}.
*
* @author Louis Wasserman
*/
@GwtCompatible
public class BstPathTest extends TestCase {
static class SimplePath extends BstPath<SimpleNode, SimplePath> {
private SimplePath(SimpleNode tip, SimplePath tail) {
super(tip, tail);
}
}
public void testTailAtRoot() {
SimpleNode root = new SimpleNode('a', null, null);
SimplePath rootPath = new SimplePath(root, null);
assertFalse(rootPath.hasPrefix());
assertNull(rootPath.prefixOrNull());
try {
rootPath.getPrefix();
fail("Expected IllegalStateException");
} catch (IllegalStateException expected) {}
}
public void testTailDown() {
SimpleNode node = new SimpleNode('a', null, null);
SimpleNode root = new SimpleNode('b', node, null);
SimplePath rootPath = new SimplePath(root, null);
SimplePath nodePath = new SimplePath(node, rootPath);
assertTrue(nodePath.hasPrefix());
assertEquals(rootPath, nodePath.prefixOrNull());
assertEquals(rootPath, nodePath.getPrefix());
}
}