HistoricTaskAndVariablesQueryTest.java example

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/* 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 org.activiti.engine.test.api.history;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.activiti.engine.history.HistoricTaskInstance;
import org.activiti.engine.history.HistoricTaskInstanceQuery;
import org.activiti.engine.impl.history.HistoryLevel;
import org.activiti.engine.impl.test.PluggableActivitiTestCase;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.activiti.engine.test.Deployment;

/**
 * @author Tijs Rademakers
 */
public class HistoricTaskAndVariablesQueryTest extends PluggableActivitiTestCase {

  private List<String> taskIds;

  public void setUp() throws Exception {

    identityService.saveUser(identityService.newUser("kermit"));
    identityService.saveUser(identityService.newUser("gonzo"));
    identityService.saveUser(identityService.newUser("fozzie"));

    identityService.saveGroup(identityService.newGroup("management"));
    identityService.saveGroup(identityService.newGroup("accountancy"));

    identityService.createMembership("kermit", "management");
    identityService.createMembership("kermit", "accountancy");
    identityService.createMembership("fozzie", "management");

    taskIds = generateTestTasks();
  }

  public void tearDown() throws Exception {
    identityService.deleteGroup("accountancy");
    identityService.deleteGroup("management");
    identityService.deleteUser("fozzie");
    identityService.deleteUser("gonzo");
    identityService.deleteUser("kermit");
    taskService.deleteTasks(taskIds, true);
  }
  
  @Deployment
  public void testQuery() {
    if (processEngineConfiguration.getHistoryLevel().isAtLeast(HistoryLevel.ACTIVITY)) {
      HistoricTaskInstance task = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables().taskAssignee("gonzo").singleResult();
      Map<String, Object> variableMap = task.getTaskLocalVariables();
      assertEquals(2, variableMap.size());
      assertEquals(0, task.getProcessVariables().size());
      assertNotNull(variableMap.get("testVar"));
      assertEquals("someVariable", variableMap.get("testVar"));
      assertNotNull(variableMap.get("testVar2"));
      assertEquals(123, variableMap.get("testVar2"));
      
      List<HistoricTaskInstance> tasks = historyService.createHistoricTaskInstanceQuery().list();
      assertEquals(3, tasks.size());
      
      task = historyService.createHistoricTaskInstanceQuery().includeProcessVariables().taskAssignee("gonzo").singleResult();
      assertEquals(0, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      
      Map<String, Object> startMap = new HashMap<String, Object>();
      startMap.put("processVar", true);
      runtimeService.startProcessInstanceByKey("oneTaskProcess", startMap);
      
      task = historyService.createHistoricTaskInstanceQuery().includeProcessVariables().taskAssignee("kermit").singleResult();
      assertEquals(1, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      assertTrue((Boolean) task.getProcessVariables().get("processVar"));
      
      taskService.setVariable(task.getId(), "anotherProcessVar", 123);
      taskService.setVariableLocal(task.getId(), "localVar", "test");
      
      task = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables().taskAssignee("kermit").singleResult();
      assertEquals(0, task.getProcessVariables().size());
      assertEquals(1, task.getTaskLocalVariables().size());
      assertEquals("test", task.getTaskLocalVariables().get("localVar"));
      
      task = historyService.createHistoricTaskInstanceQuery().includeProcessVariables().taskAssignee("kermit").singleResult();
      assertEquals(2, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      assertEquals(true, task.getProcessVariables().get("processVar"));
      assertEquals(123, task.getProcessVariables().get("anotherProcessVar"));
      
      task = historyService.createHistoricTaskInstanceQuery().taskVariableValueLike("testVar", "someVaria%").singleResult();
      assertNotNull(task);
      assertEquals("gonzoTask", task.getName());
      
      task = historyService.createHistoricTaskInstanceQuery().taskVariableValueLikeIgnoreCase("testVar", "somevaria%").singleResult();
      assertNotNull(task);
      assertEquals("gonzoTask", task.getName());
      
      task = historyService.createHistoricTaskInstanceQuery().taskVariableValueLikeIgnoreCase("testVar", "somevaria2%").singleResult();
      assertNull(task);
      
      tasks = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables().taskInvolvedUser("kermit").orderByTaskCreateTime().asc().list();
      assertEquals(3, tasks.size());
      assertEquals(1, tasks.get(0).getTaskLocalVariables().size());
      assertEquals("test", tasks.get(0).getTaskLocalVariables().get("test"));
      assertEquals(0, tasks.get(0).getProcessVariables().size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().includeProcessVariables().taskInvolvedUser("kermit").orderByTaskCreateTime().asc().list();
      assertEquals(3, tasks.size());
      assertEquals(0, tasks.get(0).getProcessVariables().size());
      assertEquals(0, tasks.get(0).getTaskLocalVariables().size());
      
      task = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables().taskAssignee("kermit").taskVariableValueEquals("localVar", "test").singleResult();
      assertEquals(0, task.getProcessVariables().size());
      assertEquals(1, task.getTaskLocalVariables().size());
      assertEquals("test", task.getTaskLocalVariables().get("localVar"));
      
      task = historyService.createHistoricTaskInstanceQuery().includeProcessVariables().taskAssignee("kermit").taskVariableValueEquals("localVar", "test").singleResult();
      assertEquals(2, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      assertEquals(true, task.getProcessVariables().get("processVar"));
      assertEquals(123, task.getProcessVariables().get("anotherProcessVar"));
      
      task = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables().includeProcessVariables().taskAssignee("kermit").singleResult();
      assertEquals(2, task.getProcessVariables().size());
      assertEquals(1, task.getTaskLocalVariables().size());
      assertEquals("test", task.getTaskLocalVariables().get("localVar"));
      assertEquals(true, task.getProcessVariables().get("processVar"));
      assertEquals(123, task.getProcessVariables().get("anotherProcessVar"));
      
      task = historyService.createHistoricTaskInstanceQuery().taskAssignee("gonzo").singleResult();
      taskService.complete(task.getId());
      task = (HistoricTaskInstance) historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables().finished().singleResult();
      variableMap = task.getTaskLocalVariables();
      assertEquals(2, variableMap.size());
      assertEquals(0, task.getProcessVariables().size());
      assertNotNull(variableMap.get("testVar"));
      assertEquals("someVariable", variableMap.get("testVar"));
      assertNotNull(variableMap.get("testVar2"));
      assertEquals(123, variableMap.get("testVar2"));
    }
  }
  
  @Deployment
  public void testOrQuery() {
    if (processEngineConfiguration.getHistoryLevel().isAtLeast(HistoryLevel.ACTIVITY)) {
      HistoricTaskInstance task = historyService.createHistoricTaskInstanceQuery()
          .includeTaskLocalVariables()
          .or()
            .taskAssignee("gonzo")
          .endOr()
          .singleResult();
      
      Map<String, Object> variableMap = task.getTaskLocalVariables();
      assertEquals(2, variableMap.size());
      assertEquals(0, task.getProcessVariables().size());
      assertNotNull(variableMap.get("testVar"));
      assertEquals("someVariable", variableMap.get("testVar"));
      assertNotNull(variableMap.get("testVar2"));
      assertEquals(123, variableMap.get("testVar2"));
      
      List<HistoricTaskInstance> tasks = historyService.createHistoricTaskInstanceQuery().list();
      assertEquals(3, tasks.size());
      
      task = historyService.createHistoricTaskInstanceQuery()
          .includeProcessVariables()
          .or()
            .taskAssignee("gonzo")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      assertEquals(0, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      
      Map<String, Object> startMap = new HashMap<String, Object>();
      startMap.put("processVar", true);
      runtimeService.startProcessInstanceByKey("oneTaskProcess", startMap);
      
      task = historyService.createHistoricTaskInstanceQuery()
          .includeProcessVariables()
          .or()
            .taskAssignee("kermit")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      assertEquals(1, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      assertTrue((Boolean) task.getProcessVariables().get("processVar"));
      
      task = historyService.createHistoricTaskInstanceQuery()
          .includeProcessVariables()
          .or()
            .taskAssignee("kermit")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .or()
            .processDefinitionKey("oneTaskProcess")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      
      assertNotNull(task);
      assertEquals(1, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      assertTrue((Boolean) task.getProcessVariables().get("processVar"));
      
      taskService.setVariable(task.getId(), "anotherProcessVar", 123);
      taskService.setVariableLocal(task.getId(), "localVar", "test");
      
      task = historyService.createHistoricTaskInstanceQuery()
          .includeTaskLocalVariables()
          .or()
            .taskAssignee("kermit")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      assertEquals(0, task.getProcessVariables().size());
      assertEquals(1, task.getTaskLocalVariables().size());
      assertEquals("test", task.getTaskLocalVariables().get("localVar"));
      
      task = historyService.createHistoricTaskInstanceQuery()
          .includeProcessVariables()
          .or()
            .taskAssignee("kermit")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      assertEquals(2, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      assertEquals(true, task.getProcessVariables().get("processVar"));
      assertEquals(123, task.getProcessVariables().get("anotherProcessVar"));
      
      task = historyService.createHistoricTaskInstanceQuery()
          .includeTaskLocalVariables()
          .or()
            .taskAssignee("nonexisting")
            .taskVariableValueLike("testVar", "someVar%")
          .endOr()
          .singleResult();
      assertEquals(2, task.getTaskLocalVariables().size());
      assertEquals(0, task.getProcessVariables().size());
      assertEquals("someVariable", task.getTaskLocalVariables().get("testVar"));
      assertEquals(123, task.getTaskLocalVariables().get("testVar2"));
      
      task = historyService.createHistoricTaskInstanceQuery()
          .includeTaskLocalVariables()
          .or()
            .taskAssignee("nonexisting")
            .taskVariableValueLikeIgnoreCase("testVar", "somevar%")
          .endOr()
          .singleResult();
      assertEquals(2, task.getTaskLocalVariables().size());
      assertEquals(0, task.getProcessVariables().size());
      assertEquals("someVariable", task.getTaskLocalVariables().get("testVar"));
      assertEquals(123, task.getTaskLocalVariables().get("testVar2"));
      
      task = historyService.createHistoricTaskInstanceQuery()
          .includeTaskLocalVariables()
          .or()
            .taskAssignee("nonexisting")
            .taskVariableValueLike("testVar", "someVar2%")
          .endOr()
          .singleResult();
      assertNull(task);
      
      tasks = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables()
          .or()
            .taskInvolvedUser("kermit")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .orderByTaskCreateTime().asc().list();
      assertEquals(3, tasks.size());
      assertEquals(1, tasks.get(0).getTaskLocalVariables().size());
      assertEquals("test", tasks.get(0).getTaskLocalVariables().get("test"));
      assertEquals(0, tasks.get(0).getProcessVariables().size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().includeProcessVariables()
          .or()
            .taskInvolvedUser("kermit")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .orderByTaskCreateTime().asc().list();
      assertEquals(3, tasks.size());
      assertEquals(0, tasks.get(0).getProcessVariables().size());
      assertEquals(0, tasks.get(0).getTaskLocalVariables().size());
      
      task = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables()
          .taskAssignee("kermit")
          .or()
            .taskVariableValueEquals("localVar", "test")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      assertEquals(0, task.getProcessVariables().size());
      assertEquals(1, task.getTaskLocalVariables().size());
      assertEquals("test", task.getTaskLocalVariables().get("localVar"));
      
      task = historyService.createHistoricTaskInstanceQuery().includeProcessVariables()
          .taskAssignee("kermit")
          .or()
            .taskVariableValueEquals("localVar", "test")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      assertEquals(2, task.getProcessVariables().size());
      assertEquals(0, task.getTaskLocalVariables().size());
      assertEquals(true, task.getProcessVariables().get("processVar"));
      assertEquals(123, task.getProcessVariables().get("anotherProcessVar"));
      
      task = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables()
          .includeProcessVariables()
          .or()
            .taskAssignee("kermit")
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      assertEquals(2, task.getProcessVariables().size());
      assertEquals(1, task.getTaskLocalVariables().size());
      assertEquals("test", task.getTaskLocalVariables().get("localVar"));
      assertEquals(true, task.getProcessVariables().get("processVar"));
      assertEquals(123, task.getProcessVariables().get("anotherProcessVar"));
      
      task = historyService.createHistoricTaskInstanceQuery()
          .taskAssignee("gonzo")
          .singleResult();
      taskService.complete(task.getId());
      task = historyService.createHistoricTaskInstanceQuery().includeTaskLocalVariables()
          .or()
            .finished()
            .taskVariableValueEquals("localVar", "nonExisting")
          .endOr()
          .singleResult();
      variableMap = task.getTaskLocalVariables();
      assertEquals(2, variableMap.size());
      assertEquals(0, task.getProcessVariables().size());
      assertNotNull(variableMap.get("testVar"));
      assertEquals("someVariable", variableMap.get("testVar"));
      assertNotNull(variableMap.get("testVar2"));
      assertEquals(123, variableMap.get("testVar2"));
    }
  }

  @Deployment
  public void testOrQueryMultipleVariableValues() {
      Map<String, Object> startMap = new HashMap<String, Object>();
      startMap.put("processVar", true);
      startMap.put("anotherProcessVar", 123);
      runtimeService.startProcessInstanceByKey("oneTaskProcess", startMap);

      startMap.put("anotherProcessVar", 999);
      runtimeService.startProcessInstanceByKey("oneTaskProcess", startMap);

      HistoricTaskInstanceQuery query0 = historyService.createHistoricTaskInstanceQuery().includeProcessVariables().or();
      for (int i = 0; i < 20; i++) {
          query0 = query0.processVariableValueEquals("anotherProcessVar", i);
      }
      query0 = query0.endOr();
      assertNull(query0.singleResult());

      HistoricTaskInstanceQuery query1 = historyService.createHistoricTaskInstanceQuery().includeProcessVariables().or().processVariableValueEquals("anotherProcessVar", 123);
      for (int i = 0; i < 20; i++) {
          query1 = query1.processVariableValueEquals("anotherProcessVar", i);
      }
      query1 = query1.endOr();
      HistoricTaskInstance task = query1.singleResult();
      assertEquals(2, task.getProcessVariables().size());
      assertEquals(true, task.getProcessVariables().get("processVar"));
      assertEquals(123, task.getProcessVariables().get("anotherProcessVar"));
  }
  
  @Deployment
  public void testCandidate() {
    if (processEngineConfiguration.getHistoryLevel().isAtLeast(HistoryLevel.ACTIVITY)) {
      ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("oneTaskProcess");
      List<HistoricTaskInstance> tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("kermit").list();
      assertEquals(3, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("gonzo").list();
      assertEquals(0, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("fozzie").list();
      assertEquals(1, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateGroup("management").list();
      assertEquals(1, tasks.size());
      List<String> groups = new ArrayList<String>();
      groups.add("management");
      groups.add("accountancy");
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateGroupIn(groups).list();
      assertEquals(1, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("kermit").taskCandidateGroupIn(groups).list();
      assertEquals(3, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("gonzo").taskCandidateGroupIn(groups).list();
      assertEquals(1, tasks.size());
      
      Task task = taskService.createTaskQuery().processInstanceId(processInstance.getId()).singleResult();
      taskService.complete(task.getId());
      
      assertEquals(0, taskService.createTaskQuery().processInstanceId(processInstance.getId()).count());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("kermit").list();
      assertEquals(3, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("gonzo").list();
      assertEquals(0, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("fozzie").list();
      assertEquals(1, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateGroup("management").list();
      assertEquals(1, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("kermit").taskCandidateGroup("management").list();
      assertEquals(3, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("gonzo").taskCandidateGroup("management").list();
      assertEquals(1, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateUser("gonzo").taskCandidateGroup("invalid").list();
      assertEquals(0, tasks.size());
      
      tasks = historyService.createHistoricTaskInstanceQuery().taskCandidateGroupIn(groups).list();
      assertEquals(1, tasks.size());
    }
  }
  
  public void testQueryWithPagingAndVariables() {
    if (processEngineConfiguration.getHistoryLevel().isAtLeast(HistoryLevel.AUDIT)) {
      List<HistoricTaskInstance> tasks = historyService.createHistoricTaskInstanceQuery()
          .includeProcessVariables()
          .includeTaskLocalVariables()
          .orderByTaskPriority()
          .desc()
          .listPage(0, 1);
      assertEquals(1, tasks.size());
      HistoricTaskInstance task = tasks.get(0);
      Map<String, Object> variableMap = task.getTaskLocalVariables();
      assertEquals(2, variableMap.size());
      assertEquals("someVariable", variableMap.get("testVar"));
      assertEquals(123, variableMap.get("testVar2"));
      
      tasks = historyService.createHistoricTaskInstanceQuery()
          .includeProcessVariables()
          .includeTaskLocalVariables()
          .orderByTaskPriority()
          .asc()
          .listPage(1, 2);
      assertEquals(2, tasks.size());
      task = tasks.get(1);
      variableMap = task.getTaskLocalVariables();
      assertEquals(2, variableMap.size());
      assertEquals("someVariable", variableMap.get("testVar"));
      assertEquals(123, variableMap.get("testVar2"));
      
      tasks = historyService.createHistoricTaskInstanceQuery()
          .includeProcessVariables()
          .includeTaskLocalVariables()
          .orderByTaskPriority()
          .asc()
          .listPage(2, 4);
      assertEquals(1, tasks.size());
      task = tasks.get(0);
      variableMap = task.getTaskLocalVariables();
      assertEquals(2, variableMap.size());
      assertEquals("someVariable", variableMap.get("testVar"));
      assertEquals(123, variableMap.get("testVar2"));
      
      tasks = historyService.createHistoricTaskInstanceQuery()
          .includeProcessVariables()
          .includeTaskLocalVariables()
          .orderByTaskPriority()
          .asc()
          .listPage(4, 2);
      assertEquals(0, tasks.size());
    }
  }
  
  @Deployment(resources={"org/activiti/engine/test/api/task/TaskQueryTest.testProcessDefinition.bpmn20.xml"})
  public void testWithoutDueDateQuery() throws Exception {
    if(processEngineConfiguration.getHistoryLevel().isAtLeast(HistoryLevel.AUDIT)) {
      ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("oneTaskProcess");
      HistoricTaskInstance historicTask = historyService.createHistoricTaskInstanceQuery().processInstanceId(processInstance.getId()).withoutTaskDueDate().singleResult();
      assertNotNull(historicTask);
      assertNull(historicTask.getDueDate());
      
      // Set due-date on task
      Task task = taskService.createTaskQuery().processInstanceId(processInstance.getId()).singleResult();
      Date dueDate = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss").parse("01/02/2003 01:12:13");
      task.setDueDate(dueDate);
      taskService.saveTask(task);

      assertEquals(0, historyService.createHistoricTaskInstanceQuery().processInstanceId(processInstance.getId()).withoutTaskDueDate().count());
      
      task = taskService.createTaskQuery().processInstanceId(processInstance.getId()).singleResult();
      
      // Clear due-date on task
      task.setDueDate(null);
      taskService.saveTask(task);
      
      assertEquals(1, historyService.createHistoricTaskInstanceQuery().processInstanceId(processInstance.getId()).withoutTaskDueDate().count());
    }
  }
  
  
  // Unit test for https://activiti.atlassian.net/browse/ACT-4152
  public void testQueryWithIncludeTaskVariableAndTaskCategory() {
  	List<HistoricTaskInstance> tasks = historyService.createHistoricTaskInstanceQuery().taskAssignee("gonzo").list();
  	for (HistoricTaskInstance task : tasks) {
  		assertNotNull(task.getCategory());
  		assertEquals("testCategory", task.getCategory());
  	}
  	
  	tasks = historyService.createHistoricTaskInstanceQuery().taskAssignee("gonzo").includeTaskLocalVariables().list();
  	for (HistoricTaskInstance task : tasks) {
  		assertNotNull(task.getCategory());
  		assertEquals("testCategory", task.getCategory());
  	}
  	

  	tasks = historyService.createHistoricTaskInstanceQuery().taskAssignee("gonzo").includeProcessVariables().list();
  	for (HistoricTaskInstance task : tasks) {
  		assertNotNull(task.getCategory());
  		assertEquals("testCategory", task.getCategory());
  	}
  }
  
  /**
   * Generates some test tasks. - 2 tasks where kermit is a candidate and 1 task
   * where gonzo is assignee
   */
  private List<String> generateTestTasks() throws Exception {
    List<String> ids = new ArrayList<String>();

    SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss.SSS");
    // 2 tasks for kermit
    processEngineConfiguration.getClock().setCurrentTime(sdf.parse("01/01/2001 01:01:01.000"));
    for (int i = 0; i < 2; i++) {
      Task task = taskService.newTask();
      task.setName("testTask");
      task.setDescription("testTask description");
      task.setPriority(3);
      taskService.saveTask(task);
      ids.add(task.getId());
      taskService.setVariableLocal(task.getId(), "test", "test");
      taskService.addCandidateUser(task.getId(), "kermit");
    }

    processEngineConfiguration.getClock().setCurrentTime(sdf.parse("02/02/2002 02:02:02.000"));
    // 1 task for gonzo
    Task task = taskService.newTask();
    task.setName("gonzoTask");
    task.setDescription("gonzo description");
    task.setPriority(4);    
    task.setCategory("testCategory");
    taskService.saveTask(task);
    taskService.setAssignee(task.getId(), "gonzo");
    taskService.setVariableLocal(task.getId(), "testVar", "someVariable");
    taskService.setVariableLocal(task.getId(), "testVar2", 123);
    ids.add(task.getId());

    return ids;
  }

}