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CalculatorTest.java


import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

public class CalculatorTest {

    @Test
    public void testAdd() {
        Calculator calculator = new Calculator();
        assertEquals(5, calculator.add(2, 3));
        assertEquals(-1, calculator.add(2, -3));
        assertEquals(0, calculator.add(0, 0));
    }

    @Test
    public void testSubtract() {
        Calculator calculator = new Calculator();
        assertEquals(1, calculator.subtract(3, 2));
        assertEquals(5, calculator.subtract(2, -3));
        assertEquals(0, calculator.subtract(0, 0));
    }

    @Test
    public void testMultiply() {
        Calculator calculator = new Calculator();
        assertEquals(6, calculator.multiply(2, 3));
        assertEquals(-6, calculator.multiply(2, -3));
        assertEquals(0, calculator.multiply(0, 5));
    }

}

XML Comparison Tool

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original.xml

<?xml version="1.0" encoding="UTF-8"?>
                                <catalog>
                                    <book id="bk101">
                                        <author>Gambardella, Matthew</author>
                                        <title>XML Developer's Guide</title>
                                        <genre>Computer</genre>
                                        <price>44.95</price>
                                        <publish_date>2000-10-01</publish_date>
                                    </book>
                                    <book id="bk102">
                                        <author>Ralls, Kim</author>
                                        <title>Midnight Rain</title>
                                        <genre>Fantasy</genre>
                                        <price>5.95</price>
                                        <publish_date>2000-12-16</publish_date>
                                    </book>
                                </catalog>

modified.xml

<?xml version="1.0" encoding="UTF-8"?>
<catalog>
    <book id="bk101">
        <author>Gambardella, Matthew</author>
        <title>XML Developer's Guide</title>
        <genre>Programming</genre>
        <price>49.99</price>
        <publish_date>2000-10-01</publish_date>
    </book>
    <book id="bk102">
        <author>Ralls, Kim</author>
        <title>Midnight Rain</title>
        <genre>Fantasy</genre>
        <price>5.95</price>
        <publish_date>2000-12-16</publish_date>
    </book>
    <book id="bk103">
        <author>Corets, Eva</author>
        <title>Maeve Ascendant</title>
        <genre>Fantasy</genre>
        <price>7.95</price>
        <publish_date>2000-11-17</publish_date>
    </book>
</catalog>

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