handlingExceptionsUsingJUnit5.java

package LambdaTest;


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


class handlingExceptionsUsingJUnit5 {

    @Test
    void whenNoExceptionIsThrown() {

        NumberFormatException thrown = Assertions
                .assertThrows(NumberFormatException.class, () -> {
                    Integer.parseInt("1");
                }, "NumberFormatException error was expected, but no exception was thrown");

        Assertions.assertEquals("Some expected message", thrown.getMessage());
    }


    @Test
    void whenAdifferentExceptionIsThrown() {

        NumberFormatException thrown = Assertions
                .assertThrows(NumberFormatException.class, () -> {
                    int result = 3 / 0;
                }, "NumberFormatException error was expected, but a different exception was thrown");

        Assertions.assertEquals("Some expected message", thrown.getMessage());
    }


    @Test
    void whenTheSameExceptionIsThrown() {

        NumberFormatException thrown = Assertions.assertThrows(NumberFormatException.class, () -> {
            Integer.parseInt("One");
        }, "NumberFormatException is expected");

        Assertions.assertEquals("For input string: \"One\"", thrown.getMessage());
    }

    @Test
    void whenParentExceptionIsThrown() {

        Assertions.assertThrows(IllegalArgumentException.class, () -> {
            Integer.parseInt("One");
        });
    }


}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>LambdaTest</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>5.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>5.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-params</artifactId>
            <version>5.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.platform</groupId>
            <artifactId>junit-platform-suite</artifactId>
            <version>1.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>5.8.1</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

</project>