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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.jexl3;
18  
19  import org.junit.Assert;
20  import org.junit.Test;
21  
22  /**
23   * Tests for while statement.
24   * @since 1.1
25   */
26  @SuppressWarnings({"UnnecessaryBoxing", "AssertEqualsBetweenInconvertibleTypes"})
27  public class WhileTest extends JexlTestCase {
28  
29      public WhileTest() {
30          super("WhileTest");
31      }
32  
33      @Test
34      public void testSimpleWhileFalse() throws Exception {
35          final JexlScript e = JEXL.createScript("while (false) ;");
36          final JexlContext jc = new MapContext();
37  
38          final Object o = e.execute(jc);
39          Assert.assertNull("Result is not null", o);
40      }
41  
42      @Test
43      public void testWhileExecutesExpressionWhenLooping() throws Exception {
44          final JexlScript e = JEXL.createScript("while (x < 10) x = x + 1;");
45          final JexlContext jc = new MapContext();
46          jc.set("x", new Integer(1));
47  
48          final Object o = e.execute(jc);
49          Assert.assertEquals("Result is wrong", new Integer(10), o);
50      }
51  
52      @Test
53      public void testWhileWithBlock() throws Exception {
54          final JexlScript e = JEXL.createScript("while (x < 10) { x = x + 1; y = y * 2; }");
55          final JexlContext jc = new MapContext();
56          jc.set("x", new Integer(1));
57          jc.set("y", new Integer(1));
58  
59          final Object o = e.execute(jc);
60          Assert.assertEquals("Result is wrong", new Integer(512), o);
61          Assert.assertEquals("x is wrong", new Integer(10), jc.get("x"));
62          Assert.assertEquals("y is wrong", new Integer(512), jc.get("y"));
63      }
64  }