384 lines
12 KiB
Java
384 lines
12 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.Graph;
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import com.google.javascript.jscomp.graph.LinkedDirectedGraph;
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import com.google.javascript.jscomp.graph.LinkedUndirectedGraph;
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import com.google.javascript.jscomp.graph.Annotatable;
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import com.google.javascript.jscomp.graph.Annotation;
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import com.google.javascript.jscomp.graph.GraphNode;
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import com.google.javascript.jscomp.graph.SubGraph;
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import com.google.javascript.jscomp.graph.DiGraph;
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import com.google.javascript.jscomp.graph.Graph.GraphEdge;
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import com.google.javascript.jscomp.graph.UndiGraph;
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import junit.framework.TestCase;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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/**
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* Tests for the graph data structure.
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*
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*/
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public class GraphTest extends TestCase {
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public void testDirectedSimple() {
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DiGraph<String, String> graph =
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LinkedDirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.createNode("c");
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graph.connect("a", "->", "b");
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assertTrue(graph.hasNode("a"));
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assertTrue(graph.hasNode("b"));
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assertTrue(graph.hasNode("c"));
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assertFalse(graph.hasNode("d"));
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assertTrue(graph.isConnected("a", "b"));
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assertTrue(graph.isConnected("b", "a"));
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assertFalse(graph.isConnected("a", "c"));
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assertFalse(graph.isConnected("b", "c"));
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assertFalse(graph.isConnected("c", "a"));
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assertFalse(graph.isConnected("c", "b"));
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assertFalse(graph.isConnected("a", "a"));
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assertFalse(graph.isConnected("b", "b"));
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assertFalse(graph.isConnected("b", "c"));
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assertTrue(graph.isConnectedInDirection("a", "b"));
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assertFalse(graph.isConnectedInDirection("b", "a"));
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assertFalse(graph.isConnectedInDirection("a", "c"));
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assertFalse(graph.isConnectedInDirection("b", "c"));
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assertFalse(graph.isConnectedInDirection("c", "a"));
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assertFalse(graph.isConnectedInDirection("c", "b"));
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// Removal.
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graph.disconnect("a", "b");
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assertFalse(graph.isConnected("a", "b"));
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assertFalse(graph.isConnected("b", "a"));
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// Disconnect both ways.
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graph.connect("a", "->", "b");
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graph.connect("b", "->", "a");
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graph.disconnect("a", "b");
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assertFalse(graph.isConnected("a", "b"));
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assertFalse(graph.isConnected("b", "a"));
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// Disconnect one way.
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graph.connect("a", "->", "b");
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graph.connect("b", "->", "a");
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graph.disconnectInDirection("a", "b");
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assertTrue(graph.isConnected("b", "a"));
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assertTrue(graph.isConnected("a", "b"));
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assertFalse(graph.isConnectedInDirection("a", "b"));
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assertTrue(graph.isConnectedInDirection("b", "a"));
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}
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public void testUndirectedSimple() {
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UndiGraph<String, String> graph =
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LinkedUndirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.createNode("c");
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graph.connect("a", "--", "b");
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assertTrue(graph.hasNode("a"));
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assertTrue(graph.hasNode("b"));
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assertTrue(graph.hasNode("c"));
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assertFalse(graph.hasNode("d"));
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assertTrue(graph.isConnected("a", "b"));
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assertTrue(graph.isConnected("b", "a"));
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assertFalse(graph.isConnected("a", "c"));
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assertFalse(graph.isConnected("b", "c"));
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assertFalse(graph.isConnected("c", "a"));
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assertFalse(graph.isConnected("c", "b"));
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assertFalse(graph.isConnected("a", "a"));
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assertFalse(graph.isConnected("b", "b"));
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assertFalse(graph.isConnected("b", "c"));
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// Removal.
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graph.disconnect("a", "b");
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assertFalse(graph.isConnected("a", "b"));
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assertFalse(graph.isConnected("b", "a"));
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}
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public void testDirectedSelfLoop() {
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DiGraph<String, String> graph =
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LinkedDirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.connect("a", "->", "a");
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assertTrue(graph.isConnected("a", "a"));
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assertFalse(graph.isConnected("a", "b"));
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assertFalse(graph.isConnected("b", "a"));
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assertTrue(graph.isConnectedInDirection("a", "a"));
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assertFalse(graph.isConnectedInDirection("a", "b"));
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assertFalse(graph.isConnectedInDirection("b", "a"));
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// Removal.
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graph.disconnect("a", "a");
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assertFalse(graph.isConnected("a", "a"));
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// Disconnect both ways.
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graph.connect("a", "->", "a");
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graph.disconnect("a", "a");
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assertFalse(graph.isConnected("a", "a"));
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assertFalse(graph.isConnected("a", "a"));
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// Disconnect one way.
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graph.connect("a", "->", "a");
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graph.disconnectInDirection("a", "a");
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assertFalse(graph.isConnected("a", "a"));
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}
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public void testUndirectedSelfLoop() {
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UndiGraph<String, String> graph =
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LinkedUndirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.connect("a", "--", "a");
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assertTrue(graph.isConnected("a", "a"));
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assertFalse(graph.isConnected("a", "b"));
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assertFalse(graph.isConnected("b", "a"));
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// Removal.
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graph.disconnect("a", "a");
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assertFalse(graph.isConnected("a", "a"));
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}
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public void testDirectedInAndOutEdges() {
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DiGraph<String, String> graph =
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LinkedDirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.createNode("c");
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graph.createNode("d");
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graph.connect("a", "->", "b");
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graph.connect("a", "-->", "b");
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graph.connect("a", "--->", "b");
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graph.connect("a", "->", "c");
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graph.connect("c", "->", "d");
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assertSetEquals(graph.getDirectedSuccNodes("a"), "b", "c");
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assertSetEquals(graph.getDirectedPredNodes("b"), "a");
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assertSetEquals(graph.getDirectedPredNodes("c"), "a");
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assertListCount(graph.getDirectedSuccNodes("a"), "b", 3);
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// Removal.
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graph.disconnect("a", "b");
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assertFalse(graph.isConnected("a", "b"));
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}
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public void testUndirectedNeighbors() {
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UndiGraph<String, String> graph =
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LinkedUndirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.createNode("c");
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graph.createNode("d");
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graph.connect("a", "-", "b");
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graph.connect("a", "--", "b");
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graph.connect("a", "---", "b");
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graph.connect("a", "-", "c");
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graph.connect("c", "-", "d");
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assertSetEquals(graph.getNeighborNodes("a"), "b", "c");
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assertSetEquals(graph.getNeighborNodes("b"), "a");
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assertSetEquals(graph.getNeighborNodes("c"), "a", "d");
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assertListCount(graph.getNeighborNodes("a"), "b", 3);
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// Removal.
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graph.disconnect("a", "b");
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assertFalse(graph.isConnected("a", "b"));
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}
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public void testDirectedGetFirstEdge() {
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DiGraph<String, String> graph =
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LinkedDirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.createNode("c");
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graph.connect("a", "-", "b");
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assertEquals(graph.getFirstEdge("a", "b").getValue(), "-");
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assertEquals(graph.getFirstEdge("b", "a").getValue(), "-");
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assertNull(graph.getFirstEdge("a", "c"));
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}
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public void testUndirectedGetFirstEdge() {
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UndiGraph<String, String> graph =
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LinkedUndirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.createNode("c");
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graph.connect("a", "-", "b");
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assertEquals(graph.getFirstEdge("a", "b").getValue(), "-");
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assertEquals(graph.getFirstEdge("b", "a").getValue(), "-");
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assertNull(graph.getFirstEdge("a", "c"));
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}
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public void testNodeAnnotations() {
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Graph<String, String> graph = LinkedUndirectedGraph.create();
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GraphNode<String, String> a = graph.createNode("a");
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GraphNode<String, String> b = graph.createNode("b");
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checkAnnotations(graph, a, b);
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}
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public void testEdgeAnnotations() {
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Graph<String, String> graph = LinkedUndirectedGraph.create();
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graph.createNode("1");
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graph.createNode("2");
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graph.createNode("3");
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graph.connect("1", "a", "2");
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graph.connect("2", "b", "3");
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GraphEdge<String, String> a = graph.getEdges("1", "2").get(0);
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GraphEdge<String, String> b = graph.getEdges("2", "3").get(0);
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checkAnnotations(graph, a, b);
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}
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private static void checkAnnotations(
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Graph<String, String> graph, Annotatable a, Annotatable b) {
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final Annotation A = new Annotation() {};
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final Annotation B = new Annotation() {};
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// Initially null.
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assertNull(a.getAnnotation());
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assertNull(b.getAnnotation());
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// Test basic setting.
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a.setAnnotation(A);
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b.setAnnotation(B);
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assertSame(A, a.getAnnotation());
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assertSame(B, b.getAnnotation());
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// Test clearing.
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graph.clearEdgeAnnotations();
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graph.clearNodeAnnotations();
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assertNull(a.getAnnotation());
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assertNull(b.getAnnotation());
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a.setAnnotation(A);
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b.setAnnotation(B);
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// Pushing clears.
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graph.pushEdgeAnnotations();
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graph.pushNodeAnnotations();
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assertNull(a.getAnnotation());
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assertNull(b.getAnnotation());
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a.setAnnotation(B);
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b.setAnnotation(B);
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graph.pushEdgeAnnotations();
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graph.pushNodeAnnotations();
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a.setAnnotation(B);
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b.setAnnotation(A);
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// Test restoring then restoring old values with pop.
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assertSame(B, a.getAnnotation());
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assertSame(A, b.getAnnotation());
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graph.popEdgeAnnotations();
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graph.popNodeAnnotations();
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assertSame(B, a.getAnnotation());
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assertSame(B, b.getAnnotation());
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graph.popEdgeAnnotations();
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graph.popNodeAnnotations();
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assertSame(A, a.getAnnotation());
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assertSame(B, b.getAnnotation());
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}
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public void testDegree() {
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testDirectedDegree(LinkedDirectedGraph.<String, String>create());
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testDirectedDegree(LinkedUndirectedGraph.<String, String>create());
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}
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public void testDirectedDegree(Graph<String, String> graph) {
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graph.createNode("a");
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graph.createNode("b");
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graph.createNode("c");
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graph.createNode("d");
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assertEquals(0, graph.getNodeDegree("a"));
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graph.connect("a", "-", "b");
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assertEquals(1, graph.getNodeDegree("a"));
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graph.connect("b", "-", "c");
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assertEquals(1, graph.getNodeDegree("a"));
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graph.connect("a", "-", "c");
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assertEquals(2, graph.getNodeDegree("a"));
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graph.connect("d", "-", "a");
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assertEquals(3, graph.getNodeDegree("a"));
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}
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public void testDirectedConnectIfNotFound() {
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testDirectedConnectIfNotFound(
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LinkedDirectedGraph.<String, String>create());
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testDirectedConnectIfNotFound(
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LinkedUndirectedGraph.<String, String>create());
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}
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public void testDirectedConnectIfNotFound(Graph<String, String> graph) {
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graph.createNode("a");
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graph.createNode("b");
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graph.connectIfNotFound("a", "-", "b");
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assertEquals(1, graph.getNodeDegree("a"));
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graph.connectIfNotFound("a", "-", "b");
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assertEquals(1, graph.getNodeDegree("a"));
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graph.connectIfNotFound("a", null, "b");
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assertEquals(2, graph.getNodeDegree("a"));
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graph.connectIfNotFound("a", null, "b");
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assertEquals(2, graph.getNodeDegree("a"));
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}
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public void testSimpleSubGraph() {
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UndiGraph<String, String> graph =
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LinkedUndirectedGraph.create();
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graph.createNode("a");
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graph.createNode("b");
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graph.createNode("c");
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graph.connect("a", "--", "b");
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SubGraph<String, String> subGraph = graph.newSubGraph();
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subGraph.addNode("a");
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subGraph.addNode("b");
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try {
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subGraph.addNode("d");
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fail("SubGraph should not allow add for node that is not in graph.");
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} catch (IllegalArgumentException e) {
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// exception expected
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}
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assertFalse(subGraph.isIndependentOf("a"));
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assertFalse(subGraph.isIndependentOf("b"));
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assertTrue(subGraph.isIndependentOf("c"));
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}
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private <T extends GraphNode<String, String>> void assertListCount(
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List<T> list, String target, int count) {
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for (GraphNode<String, String> node : list) {
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if (node.getValue().equals(target)) {
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count--;
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}
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}
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assertTrue(count == 0);
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}
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private <T extends GraphNode<String, String>> void assertSetEquals(
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List<T> list, String ... targets) {
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Set<String> set = new HashSet<String>();
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for (GraphNode<String, String> node : list) {
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set.add(node.getValue());
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}
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Set<String> otherSet = new HashSet<String>();
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for (String target : targets) {
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otherSet.add(target);
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}
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assertTrue(otherSet.equals(set));
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}
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}
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