DefaultMutablePathTest.java
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package org.onlab.graph;
import com.google.common.testing.EqualsTester;
import org.junit.Test;
import static com.google.common.collect.ImmutableList.of;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
/**
* Test of the default mutable path.
*/
public class DefaultMutablePathTest extends DefaultPathTest {
@Test
public void equality() {
DefaultPath<TestVertex, TestEdge> p1 =
new DefaultPath<>(of(new TestEdge(A, B, 1),
new TestEdge(B, C, 1)), 2.0);
DefaultPath<TestVertex, TestEdge> p2 =
new DefaultPath<>(of(new TestEdge(A, B, 1),
new TestEdge(B, D, 1)), 2.0);
new EqualsTester().addEqualityGroup(new DefaultMutablePath<>(p1),
new DefaultMutablePath<>(p1))
.addEqualityGroup(new DefaultMutablePath<>(p2))
.testEquals();
}
@Test
public void empty() {
MutablePath<TestVertex, TestEdge> p = new DefaultMutablePath<>();
assertNull("src should be null", p.src());
assertNull("dst should be null", p.dst());
assertEquals("incorrect edge count", 0, p.edges().size());
assertEquals("incorrect path cost", 0.0, p.cost(), 0.1);
}
@Test
public void pathCost() {
MutablePath<TestVertex, TestEdge> p = new DefaultMutablePath<>();
p.setCost(4);
assertEquals("incorrect path cost", 4.0, p.cost(), 0.1);
}
private void validatePath(Path<TestVertex, TestEdge> p,
TestVertex src, TestVertex dst, int length) {
validatePath(p, src, dst, length, 0.0);
}
@Test
public void insertEdge() {
MutablePath<TestVertex, TestEdge> p = new DefaultMutablePath<>();
p.insertEdge(new TestEdge(B, C, 1));
p.insertEdge(new TestEdge(A, B, 1));
validatePath(p, A, C, 2);
}
@Test
public void appendEdge() {
MutablePath<TestVertex, TestEdge> p = new DefaultMutablePath<>();
p.appendEdge(new TestEdge(A, B, 1));
p.appendEdge(new TestEdge(B, C, 1));
validatePath(p, A, C, 2);
}
@Test
public void removeEdge() {
MutablePath<TestVertex, TestEdge> p = new DefaultMutablePath<>();
p.appendEdge(new TestEdge(A, B, 1));
p.appendEdge(new TestEdge(B, C, 1));
p.appendEdge(new TestEdge(C, C, 2));
p.appendEdge(new TestEdge(C, D, 1));
validatePath(p, A, D, 4);
p.removeEdge(new TestEdge(A, B, 1));
validatePath(p, B, D, 3);
p.removeEdge(new TestEdge(C, C, 2));
validatePath(p, B, D, 2);
p.removeEdge(new TestEdge(C, D, 1));
validatePath(p, B, C, 1);
}
@Test
public void toImmutable() {
MutablePath<TestVertex, TestEdge> p = new DefaultMutablePath<>();
p.appendEdge(new TestEdge(A, B, 1));
p.appendEdge(new TestEdge(B, C, 1));
validatePath(p, A, C, 2);
assertEquals("immutables should equal", p.toImmutable(), p.toImmutable());
validatePath(p.toImmutable(), A, C, 2);
}
}