/*
GanttProject is an opensource project management tool.
Copyright (C) 2009 Dmitry Barashev
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package net.sourceforge.ganttproject.test.task;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import net.sourceforge.ganttproject.task.Task;
import net.sourceforge.ganttproject.task.TaskManager;
import net.sourceforge.ganttproject.task.TaskMutator;
import net.sourceforge.ganttproject.task.dependency.TaskDependency;
import net.sourceforge.ganttproject.task.dependency.TaskDependencyConstraint;
import net.sourceforge.ganttproject.task.dependency.constraint.FinishFinishConstraintImpl;
import net.sourceforge.ganttproject.task.dependency.constraint.StartStartConstraintImpl;
public class TestCriticalPath extends TaskTestCase {
public void testSinglePathIsCritical() throws Exception {
TaskManager mgr = getTaskManager();
Task t1 = createTask();
Task t2 = createTask();
Task t3 = createTask();
createDependency(t3, t2);
createDependency(t2, t1);
Set<Task> criticalTasks = new HashSet<Task>(Arrays.asList(
mgr.getAlgorithmCollection().getCriticalPathAlgorithm().getCriticalTasks()));
assertTrue(criticalTasks.contains(t1));
assertTrue(criticalTasks.contains(t2));
assertTrue(criticalTasks.contains(t3));
}
public void testLongerPathIsCritical() throws Exception {
TaskManager mgr = getTaskManager();
Task t1 = createTask();
Task t2 = createTask();
Task t3 = createTask();
Task t4 = createTask();
Task t5 = createTask();
createDependency(t4, t3);
createDependency(t3, t2);
createDependency(t2, t1);
createDependency(t4, t5);
createDependency(t5, t1);
Set<Task> criticalTasks = new HashSet<Task>(Arrays.asList(
mgr.getAlgorithmCollection().getCriticalPathAlgorithm().getCriticalTasks()));
assertTrue(criticalTasks.contains(t1));
assertTrue(criticalTasks.contains(t2));
assertTrue(criticalTasks.contains(t3));
assertTrue(criticalTasks.contains(t4));
assertFalse(criticalTasks.contains(t5));
}
public void testEqualPathsAreBothCritical() throws Exception {
TaskManager mgr = getTaskManager();
Task t1 = createTask();
Task t2 = createTask();
Task t3 = createTask();
Task t4 = createTask();
createDependency(t4, t2);
createDependency(t4, t3);
createDependency(t2, t1);
createDependency(t3, t1);
Set<Task> criticalTasks = new HashSet<Task>(Arrays.asList(
mgr.getAlgorithmCollection().getCriticalPathAlgorithm().getCriticalTasks()));
assertTrue(criticalTasks.contains(t1));
assertTrue(criticalTasks.contains(t2));
assertTrue(criticalTasks.contains(t3));
assertTrue(criticalTasks.contains(t4));
}
public void testUnlinkedTaskICriticalIfEndsAtTheProjectEnd() throws Exception {
TaskManager mgr = getTaskManager();
Task t1 = createTask();
Task t2 = createTask();
Task t3 = createTask();
createDependency(t3, t2);
createDependency(t2, t1);
Task u1 = createTask();
TaskMutator mu1 = u1.createMutatorFixingDuration();
mu1.setStart(t3.getStart());
mu1.commit();
Task u2 = createTask();
TaskMutator mu2 = u2.createMutatorFixingDuration();
mu2.setStart(t2.getStart());
mu2.commit();
Set<Task> criticalTasks = new HashSet<Task>(Arrays.asList(
mgr.getAlgorithmCollection().getCriticalPathAlgorithm().getCriticalTasks()));
assertTrue(criticalTasks.contains(t1));
assertTrue(criticalTasks.contains(t2));
assertTrue(criticalTasks.contains(t3));
assertTrue(criticalTasks.contains(u1));
assertFalse(criticalTasks.contains(u2));
}
public void testCriticalPathInsideCriticalSupertask() throws Exception {
Task t1 = createTask();
Task t2 = createTask();
Task t3 = createTask();
createDependency(t3, t2);
createDependency(t2, t1);
Task n1 = createTask();
n1.move(t2);
Task n2 = createTask();
n2.move(t2);
createDependency(n2, n1);
TaskManager mgr = getTaskManager();
Set<Task> criticalTasks = new HashSet<Task>(Arrays.asList(
mgr.getAlgorithmCollection().getCriticalPathAlgorithm().getCriticalTasks()));
assertTrue(criticalTasks.contains(t1));
assertTrue(criticalTasks.contains(t2));
assertTrue(criticalTasks.contains(t3));
assertTrue(criticalTasks.contains(n1));
assertTrue(criticalTasks.contains(n2));
}
public void testLag() throws Exception {
TaskManager mgr = getTaskManager();
Task t1 = createTask();
Task t2 = createTask();
Task t3 = createTask();
createDependency(t3, t2);
TaskDependency dep = createDependency(t2, t1);
dep.setDifference(2);
Set<Task> criticalTasks = new HashSet<Task>(Arrays.asList(
mgr.getAlgorithmCollection().getCriticalPathAlgorithm().getCriticalTasks()));
assertTrue(criticalTasks.contains(t1));
assertTrue(criticalTasks.contains(t2));
assertTrue(criticalTasks.contains(t3));
}
public void testTaskBeforeNonCriticalIsNonCritical() throws Exception {
TaskManager mgr = getTaskManager();
Task t1 = createTask();
Task t2 = createTask();
Task t3 = createTask();
Task t4 = createTask();
Task t5 = createTask();
Task t6 = createTask();
createDependency(t2, t1);
createDependency(t4, t3);
createDependency(t5, t4);
createDependency(t6, t5);
createDependency(t6, t2);
Set<Task> criticalTasks = new HashSet<Task>(Arrays.asList(
mgr.getAlgorithmCollection().getCriticalPathAlgorithm().getCriticalTasks()));
assertTrue(criticalTasks.contains(t3));
assertTrue(criticalTasks.contains(t4));
assertTrue(criticalTasks.contains(t5));
assertTrue(criticalTasks.contains(t6));
assertFalse(criticalTasks.contains(t1));
assertFalse(criticalTasks.contains(t2));
}
class LaggedDependencyChainCriticalPathTester {
private final Task t1;
private final Task t2;
private final Task t3;
private final HashSet<Task> criticalTasks;
public LaggedDependencyChainCriticalPathTester(TaskDependencyConstraint constraint) throws Exception {
TaskManager mgr = getTaskManager();
t1 = createTask();
t2 = createTask();
t3 = createTask();
TaskDependency dep_3_2 = createDependency(t3, t2);
dep_3_2.setConstraint((TaskDependencyConstraint) constraint.clone());
TaskDependency dep_2_1 = createDependency(t2, t1);
dep_2_1.setConstraint((TaskDependencyConstraint) constraint.clone());
dep_2_1.setDifference(2);
mgr.getAlgorithmCollection().getRecalculateTaskScheduleAlgorithm().run();
criticalTasks = new HashSet<Task>(Arrays.asList(
mgr.getAlgorithmCollection().getCriticalPathAlgorithm().getCriticalTasks()));
}
public void runDefaultAsserts() {
assertTrue(criticalTasks.contains(t1));
assertTrue(criticalTasks.contains(t2));
assertTrue(criticalTasks.contains(t3));
}
}
public void testFinishFinishConstraint() throws Exception {
LaggedDependencyChainCriticalPathTester tester =
new LaggedDependencyChainCriticalPathTester(new FinishFinishConstraintImpl());
tester.runDefaultAsserts();
}
public void testStartStartConstraint() throws Exception {
LaggedDependencyChainCriticalPathTester tester =
new LaggedDependencyChainCriticalPathTester(new StartStartConstraintImpl());
tester.runDefaultAsserts();
}
public void testStartFinishConstraint() throws Exception {
LaggedDependencyChainCriticalPathTester tester =
new LaggedDependencyChainCriticalPathTester(new StartStartConstraintImpl());
assertTrue(tester.criticalTasks.contains(tester.t1));
assertTrue(tester.criticalTasks.contains(tester.t2));
}
}