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<?php
/* This class is part of the XP framework
 *
 * $Id$
 */

  $package= 'net.xp_lang.tests.execution.source';

  uses('net.xp_lang.tests.execution.source.ExecutionTest');

  /**
   * Tests null-safe object operator ?.
   *
   */
  class net·xp_lang·tests·execution·source·NullSafeObjectOperatorTest extends ExecutionTest {

    /**
     * Test
     *
     */
    #[@test]
    public function nullDotMethod() {
      $this->assertNull($this->run('$instance= null; return $instance?.method();'));
    }

    /**
     * Test
     *
     */
    #[@test]
    public function nullReturnedFromMethod() {
      $this->assertNull($this->run('$v= new util.collections.Vector<var>(); $v.add(null); return $v.get(0)?.hashCode();'));
    }

    /**
     * Test
     *
     */
    #[@test]
    public function nullNotReturnedFromMethod() {
      $this->assertNotEquals(NULL, $this->run('$v= new util.collections.Vector<var>(); $v.add($this); return $v.get(0)?.hashCode();'));
    }

    /**
     * Test
     *
     */
    #[@test]
    public function twoNullSafeObjectOperatorsInOneChain() {
      $this->assertNull($this->run('$v= new util.collections.Vector<var>(); $v.add(null); return $v?.get(0)?.hashCode();'));
    }

    /**
     * Test
     *
     */
    #[@test]
    public function nullDotProperty() {
      $this->assertNull($this->run('$instance= null; return $instance?.property;'));
    }

    /**
     * Test
     *
     */
    #[@test, @ignore('Generates syntax error, unexpected ")"')]
    public function nullDotInvoke() {
      $this->compile('$instance= null; return $instance?.();');
    }
  }
?>