BitwiseOperatorTest.java

/*
* Copyright 2016 Nabarun Mondal
* 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 com.noga.njexl.lang;
import com.noga.njexl.lang.junit.Asserter;

/**
 * Tests for the bitwise operators.
 * @since 1.1
 */
public class BitwiseOperatorTest extends JexlTestCase {
    private Asserter asserter;

    @Override
    public void setUp() {
        asserter = new Asserter(JEXL);
    }

    /**
     * Create the named test.
     * @param name test name
     */
    public BitwiseOperatorTest(String name) {
        super(name);
    }
    
    public void testAndWithTwoNulls() throws Exception {
        asserter.assertExpression("null & null", new Long(0));
    }

    public void testAndWithLeftNull() throws Exception {
        asserter.assertExpression("null & 1", new Long(0));
    }

    public void testAndWithRightNull() throws Exception {
        asserter.assertExpression("1 & null", new Long(0));
    }

    public void testAndSimple() throws Exception {
        asserter.assertExpression("15 & 3", new Long(15 & 3));
    }

    public void testAndVariableNumberCoercion() throws Exception {
        asserter.setVariable("x", new Integer(15));
        asserter.setVariable("y", new Short((short)7));
        asserter.assertExpression("x & y", new Long(15 & 7));
    }

    public void testAndVariableStringCoercion() throws Exception {
        asserter.setVariable("x", new Integer(15));
        asserter.setVariable("y", "7");
        asserter.assertExpression("x & y", new Long(15 & 7));
    }

    public void testComplementWithNull() throws Exception {
        asserter.assertExpression("~null", new Long(-1));
    }
    
    public void testComplementSimple() throws Exception {
        asserter.assertExpression("~128", new Long(-129));
    }

    public void testComplementVariableNumberCoercion() throws Exception {
        asserter.setVariable("x", new Integer(15));
        asserter.assertExpression("~x", new Long(~15));
    }

    public void testComplementVariableStringCoercion() throws Exception {
        asserter.setVariable("x", "15");
        asserter.assertExpression("~x", new Long(~15));
    }

    public void testOrWithTwoNulls() throws Exception {
        asserter.assertExpression("null | null", new Long(0));
    }

    public void testOrWithLeftNull() throws Exception {
        asserter.assertExpression("null | 1", new Long(1));
    }

    public void testOrWithRightNull() throws Exception {
        asserter.assertExpression("1 | null", new Long(1));
    }

    public void testOrSimple() throws Exception {
        asserter.assertExpression("12 | 3", new Long(15));
    }

    public void testOrVariableNumberCoercion() throws Exception {
        asserter.setVariable("x", new Integer(12));
        asserter.setVariable("y", new Short((short) 3));
        asserter.assertExpression("x | y", new Long(15));
    }

    public void testOrVariableStringCoercion() throws Exception {
        asserter.setVariable("x", new Integer(12));
        asserter.setVariable("y", "3");
        asserter.assertExpression("x | y", new Long(15));
    }

    public void testXorWithTwoNulls() throws Exception {
        asserter.assertExpression("null ^ null", new Long(0));
    }

    public void testXorWithLeftNull() throws Exception {
        asserter.assertExpression("null ^ 1", new Long(1));
    }

    public void testXorWithRightNull() throws Exception {
        asserter.assertExpression("1 ^ null", new Long(1));
    }

    public void testXorSimple() throws Exception {
        asserter.assertExpression("1 ^ 3", new Long(1 ^ 3));
    }

    public void testXorVariableNumberCoercion() throws Exception {
        asserter.setVariable("x", new Integer(1));
        asserter.setVariable("y", new Short((short) 3));
        asserter.assertExpression("x ^ y", new Long(1 ^ 3));
    }

    public void testXorVariableStringCoercion() throws Exception {
        asserter.setVariable("x", new Integer(1));
        asserter.setVariable("y", "3");
        asserter.assertExpression("x ^ y", new Long(1 ^ 3));
    }

    public void testParenthesized() throws Exception {
        asserter.assertExpression("(2 | 1) & 3", Long.valueOf(3L));
        asserter.assertExpression("(2 & 1) | 3", Long.valueOf(3L));
        asserter.assertExpression("~(120 | 42)", new Long( ~(120 | 42) ));
    }

}