package org.jbpm.jbpm1778;

import java.util.Collections;
import java.util.Map;

import org.jbpm.AbstractJbpmTestCase;
import org.jbpm.graph.def.ProcessDefinition;
import org.jbpm.graph.exe.ProcessInstance;
import org.jbpm.taskmgmt.exe.TaskMgmtInstance;

/**
 * Empty map variables on process creation is set as null
 * https://jira.jboss.org/jira/browse/JBPM-1778
 * 
 * @author Thomas.Diesler@jboss.com
 */
public class JBPM1778Test extends AbstractJbpmTestCase {

  public void testEmptyMapVariables() {
    ProcessDefinition pd = getProcessDefinition();

    ProcessInstance pi = pd.createProcessInstance(Collections.EMPTY_MAP);
    TaskMgmtInstance tmi = pi.getTaskMgmtInstance();
    tmi.createStartTaskInstance();

    Map piVars = pi.getContextInstance().getVariables();
    assertNotNull("ProcessInstance vars not null", piVars);
    assertEquals("ProcessInstance vars empty", 0, piVars.size());
  }

  public void testNonEmptyMapVariables() {
    ProcessDefinition pd = getProcessDefinition();

    Map vars = Collections.singletonMap("uno", "dos");
    ProcessInstance pi = pd.createProcessInstance(vars);
    TaskMgmtInstance tmi = pi.getTaskMgmtInstance();
    tmi.createStartTaskInstance();

    Map piVars = pi.getContextInstance().getVariables();
    assertNotNull("ProcessInstance vars not null", piVars);
    assertEquals("ProcessInstance vars not empty", 1, piVars.size());
  }

  private ProcessDefinition getProcessDefinition() {
    ProcessDefinition pd = ProcessDefinition.parseXmlString("<process-definition>"
        + " <start-state>"
        + "  <transition to='s' />"
        + " </start-state>"
        + " <state name='s'>"
        + "  <transition to='end' />"
        + " </state>"
        + " <end-state name='end' />"
        + "</process-definition>");
    return pd;
  }
}