SelectorParserTest xref

    1   /***
    2    *
    3    * Copyright 2004 Protique Ltd
    4    *
    5    * Licensed under the Apache License, Version 2.0 (the "License");
    6    * you may not use this file except in compliance with the License.
    7    * 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   **/
    18  package org.codehaus.activemq.selector;
    19
    20  import junit.framework.TestCase;
    21  import org.codehaus.activemq.filter.ComparisonExpression;
    22  import org.codehaus.activemq.filter.Expression;
    23  import org.codehaus.activemq.filter.ExpressionFilter;
    24  import org.codehaus.activemq.filter.Filter;
    25  import org.codehaus.activemq.filter.LogicExpression;
    26  import org.codehaus.activemq.filter.PropertyExpression;
    27
    28  /***
    29   * @version $Revision: 1.4 $
    30   */
    31  public class SelectorParserTest extends TestCase {
    32
    33      public void testParseWithParensAround() throws Exception {
    34          String[] values = {"x = 1 and y = 2", "(x = 1) and (y = 2)", "((x = 1) and (y = 2))"};
    35
    36          for (int i = 0; i < values.length; i++) {
    37              String value = values[i];
    38              System.out.println("Parsing: " + value);
    39
    40              Filter filter = parse(value);
    41              assertTrue("Created ExpressionFilter filter", filter instanceof ExpressionFilter);
    42              Expression andExpression = ((ExpressionFilter) filter).getExpression();
    43              assertTrue("Created LogicExpression expression", andExpression instanceof LogicExpression);
    44              LogicExpression logicExpression = (LogicExpression) andExpression;
    45              Expression left = logicExpression.getLeft();
    46              Expression right = logicExpression.getRight();
    47
    48              assertTrue("Left is a binary filter", left instanceof ComparisonExpression);
    49              assertTrue("Right is a binary filter", right instanceof ComparisonExpression);
    50              ComparisonExpression leftCompare = (ComparisonExpression) left;
    51              ComparisonExpression rightCompare = (ComparisonExpression) right;
    52              assertPropertyExpression("left", leftCompare.getLeft(), "x");
    53              assertPropertyExpression("right", rightCompare.getLeft(), "y");
    54          }
    55      }
    56
    57      protected void assertPropertyExpression(String message, Expression expression, String expected) {
    58          assertTrue(message + ". Must be PropertyExpression", expression instanceof PropertyExpression);
    59          PropertyExpression propExp = (PropertyExpression) expression;
    60          assertEquals(message + ". Property name", expected, propExp.getName());
    61      }
    62
    63      protected Filter parse(String text) throws Exception {
    64          return new SelectorParser().parse(text);
    65      }
    66  }