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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* 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.intellij.codeInsight.daemon.lambda;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.impl.source.resolve.graphInference.InferenceVariablesOrder;
import com.intellij.util.Function;
import junit.framework.Assert;
import junit.framework.TestCase;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* User: anna
* Date: 7/4/13
*/
public class TarjanTest extends TestCase {
//testdata from https://github.com/bwesterb/py-tarjan/
public void testResultGraph() throws Exception {
final List<List<InferenceVariablesOrder.InferenceGraphNode<Integer>>> tarjan = InferenceVariablesOrder.tarjan(Arrays.asList(initNodes()));
final String messages = StringUtil.join(tarjan, new Function<List<InferenceVariablesOrder.InferenceGraphNode<Integer>>, String>() {
@Override
public String fun(List<InferenceVariablesOrder.InferenceGraphNode<Integer>> nodes) {
return StringUtil.join(nodes, new Function<InferenceVariablesOrder.InferenceGraphNode<Integer>, String>() {
@Override
public String fun(InferenceVariablesOrder.InferenceGraphNode<Integer> node) {
return String.valueOf(node.getValue());
}
}, ",");
}
}, "\n");
Assert.assertEquals("[9]\n" +
"[8],[7],[6]\n" +
"[5]\n" +
"[2],[1]\n" +
"[4],[3]", messages);
final ArrayList<InferenceVariablesOrder.InferenceGraphNode<Integer>> acyclicNodes = InferenceVariablesOrder.initNodes(Arrays.asList(initNodes()));
final String aMessages = StringUtil.join(acyclicNodes, new Function<InferenceVariablesOrder.InferenceGraphNode<Integer>, String>() {
@Override
public String fun(InferenceVariablesOrder.InferenceGraphNode<Integer> node) {
return String.valueOf(node.getValue());
}
}, ",");
Assert.assertEquals("[9],[8, 7, 6],[5],[2, 1],[4, 3]", aMessages);
}
//{1:[2],2:[1,5],3:[4],4:[3,5],5:[6],6:[7],7:[8],8:[6,9],9:[]}
private static InferenceVariablesOrder.InferenceGraphNode<Integer>[] initNodes() {
InferenceVariablesOrder.InferenceGraphNode<Integer>[] nodes = new InferenceVariablesOrder.InferenceGraphNode[9];
for (int i = 0; i < nodes.length; i++) {
nodes[i] = new InferenceVariablesOrder.InferenceGraphNode<Integer>(i + 1);
}
nodes[0].getDependencies().add(nodes[1]);
nodes[1].getDependencies().add(nodes[0]);
nodes[1].getDependencies().add(nodes[4]);
nodes[2].getDependencies().add(nodes[3]);
nodes[3].getDependencies().add(nodes[2]);
nodes[3].getDependencies().add(nodes[4]);
nodes[4].getDependencies().add(nodes[5]);
nodes[5].getDependencies().add(nodes[6]);
nodes[6].getDependencies().add(nodes[7]);
nodes[7].getDependencies().add(nodes[5]);
nodes[7].getDependencies().add(nodes[8]);
return nodes;
}
}
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