87 lines
2.7 KiB
Java
87 lines
2.7 KiB
Java
/*
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* Copyright 2008 The Closure Compiler Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.javascript.jscomp.graph;
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import com.google.javascript.jscomp.graph.GraphReachability;
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import com.google.javascript.jscomp.graph.LinkedDirectedGraph;
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import com.google.javascript.jscomp.graph.DiGraph;
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import junit.framework.TestCase;
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/**
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* Tests for {@link GraphReachability}.
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*
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*/
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public class GraphReachabilityTest extends TestCase {
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GraphReachability<String, String> reachability = null;
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DiGraph<String, String> graph = null;
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public void testSimple() {
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graph = LinkedDirectedGraph.create();
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graph.createNode("A");
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reachability = new GraphReachability<String, String>(graph);
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reachability.compute("A");
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assertReachable("A");
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graph.createNode("B");
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reachability = new GraphReachability<String, String>(graph);
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reachability.compute("A");
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assertReachable("A");
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assertNotReachable("B");
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graph.connect("A", "--->", "B");
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reachability = new GraphReachability<String, String>(graph);
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reachability.compute("B");
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assertNotReachable("A");
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assertReachable("B");
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graph.connect("B", "--->", "A");
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reachability = new GraphReachability<String, String>(graph);
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reachability.compute("B");
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assertReachable("A");
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assertReachable("B");
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graph.createNode("C");
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reachability = new GraphReachability<String, String>(graph);
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reachability.compute("A");
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assertReachable("A");
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assertReachable("B");
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assertNotReachable("C");
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graph.createNode("D");
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graph.connect("C", "--->", "D");
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reachability = new GraphReachability<String, String>(graph);
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reachability.compute("A");
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assertReachable("A");
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assertReachable("B");
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assertNotReachable("C");
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assertNotReachable("D");
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reachability.recompute("C");
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assertReachable("C");
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assertReachable("D");
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}
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public void assertReachable(String s) {
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assertSame(s + " should be reachable", graph.getNode(s).getAnnotation(),
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GraphReachability.REACHABLE);
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}
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public void assertNotReachable(String s) {
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assertNotSame(s + " should not be reachable",
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graph.getNode(s).getAnnotation(), GraphReachability.REACHABLE);
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}
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}
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