Develop Reference

How do I include src/test/java files to run TestNG tests?

I'm just learning Java and could use your help. I'm using Eclipse, and created a Maven project using the org.openjfx archetype. Everything seems to work fine except when I try to write tests in src/test/java, which causes an error.
An error occurred while instantiating class
starcraft.warcraft.test.TestClass: Unable to make public
starcraft.warcraft.test.TestClass() accessible: module
starcraft.warcraft does not "exports starcraft.warcraft.test" to
module org.testng
This is how I created the project with default settings in Eclipse:
Project Setup with Maven Archetype Selection
Now, when Eclipse creates the project, it doesn't have a src/test/java folder, so I create that manually. Then I create a class called "TestClass" inside a package "starcraft.warcraft.test" inside src/test/java, and I add a simple method to test inside the App class called "adder". You can see the project structure
Project Structure
package starcraft.warcraft;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class App extends Application {
#Override
public void start(Stage stage) {
var javaVersion = SystemInfo.javaVersion();
var javafxVersion = SystemInfo.javafxVersion();
var label = new Label("Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".");
var scene = new Scene(new StackPane(label), 640, 480);
stage.setScene(scene);
stage.show();
}
// WILL TEST THIS METHOD
public static int adder(int digit1, int digit2) {
return digit1 + digit2;
}
public static void main(String[] args) {
launch();
}
}
Now I want to use TestNG for the tests, and so I include it in my POM which is
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>starcraft</groupId>
<artifactId>warcraft</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>13</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.testng/testng -->
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>7.5</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<release>11</release>
</configuration>
</plugin>
<plugin>
<groupId>org.openjfx</groupId>
<artifactId>javafx-maven-plugin</artifactId>
<version>0.0.6</version>
<executions>
<execution>
<!-- Default configuration for running -->
<!-- Usage: mvn clean javafx:run -->
<id>default-cli</id>
<configuration>
<mainClass>starcraft.warcraft.App</mainClass>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
This is the default POM created by the Maven archetype except for the TestNG dependency I added. When I try to use TestNG, Eclipse makes me add it to the module path like so:
Maven saying I need to add the TestNG library
And here is my module-info:
module starcraft.warcraft {
requires javafx.controls;
requires org.testng;
exports starcraft.warcraft;
}
OK, all good so far, but now when I try to run my test inside TestClass:
package starcraft.warcraft.test;
import org.testng.annotations.Test;
import starcraft.warcraft.App;
public class TestClass {
#Test
public void testAdder() {
int sum = App.adder(1, 2);
System.out.println(sum);
}
}
I get the error, which again is
An error occurred while instantiating class
starcraft.warcraft.test.TestClass: Unable to make public
starcraft.warcraft.test.TestClass() accessible: module
starcraft.warcraft does not "exports starcraft.warcraft.test" to
module org.testng
I can't figure out how to do the export. When I try making the entry in module-info, it doesn't give me the option of adding the package in src/test/java, the only packages it allows me to choose from are in src/main/java.
I don't understand modules well. How can I get the program to let me run tests from src/test/java?

Thanks everyone who looked at this. I solved it by following these steps:
Delete module-info.java. This turns it into a nonmodular project which is fine for me. I hesitated to do this because the Maven JavaFX archetype included it, but as it says here somewhere
https://openjfx.io/openjfx-docs/#IDE-Eclipse
you can just delete it after its created.
The problem then if you try to run the project is it will give you a warning that JavaFX isn't included as a module. It will still run, but its best to get rid of this incase of problems down the road. So you need to download the JavaFX libraries, place them in your hard drive, and then include them in your project via VM arguments in Eclipse:
right click project -> Run configuration -> Arguments tab -> add in the VM arguments area something like:
--module-path [fully qualified path to lib folder containing downloaded JavaFX] --add-modules javafx.controls
path would be like "C:\javafx\lib" or wherever you placed the downloaded JavaFX.
Then it should run, and project will still build using Maven, but I'm not sure if its using the JavaFX which is still in the Maven POM or the one I specified on the C drive. But it works. Any help on whats happening there would be appreciated. Thanks

Spring boot application cannot run using cmd

I try to run my compiled jar file using java -jar jarfile.jar but it returning following error.
Exception in thread "main" java.lang.ClassNotFoundException: MainApplication
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:46)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
at org.springframework.boot.loader.PropertiesLauncher.main(PropertiesLauncher.java:593)
Why this is happening. When i run in the spring tool suit it run perfectly. This happen only when i try to run my application using CMD windows

SOLVED This answer is correct.
This is the error i have done when configuration of my pom.xml in the api module of my project.
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.1.0.RELEASE</version>
<configuration>
<mainClass>com.mobios.MainApplication</mainClass>
<layout>ZIP</layout>
</configuration>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
Following line create error
<mainClass>MainApplication</mainClass>
This define the main class of the application. But i have only mentioned the class name only. It must include the group id also. I think lot of people doing this kind of simple mistakes like me. As a spring boot beginner i think it is common. The above line must be like following.
<mainClass>com.mobios.MainApplication</mainClass>
Now working fine when building the jar and run it. But without group id i can run the project in eclipse or any other development tool you are using.

Did you add this type of spring boot application class?
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class FApplication {
public static void main(String[] args) {
SpringApplication.run(FApplication.class, args);
}
}
May be your application can not find java manifest on your jar file.

Open command prompt and goto your where pom.xml presents
run mvn clean install
once you get the message build successful
goto target folder by cd target
then run the command java -jar <file-name>.jar
if you are still getting the error message while running then some spring config is wrong.
create new spring boot application from https://start.spring.io/

How to use AWS SDK for java with maven?

I want to fetch the messages in the SQS queue. I am using the maven for the first time. Here are the steps I have did so far.
1. Created maven project using this command:
mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=aws-try -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
The above command created a aws-try directory with src folder and pom.xml.
2. Added AWS-SDK dependency in pom.xml:
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk</artifactId>
<version>1.11.78</version>
</dependency>
3. Added the SQSTry.java file under src > main > java > com > mycompany > app > SQSTry.java
package com.mycompany.app;
import java.util.List;
import java.util.Map.Entry;
import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.sqs.AmazonSQS;
import com.amazonaws.services.sqs.AmazonSQSClient;
import com.amazonaws.services.sqs.model.CreateQueueRequest;
import com.amazonaws.services.sqs.model.DeleteMessageRequest;
import com.amazonaws.services.sqs.model.DeleteQueueRequest;
import com.amazonaws.services.sqs.model.Message;
import com.amazonaws.services.sqs.model.ReceiveMessageRequest;
import com.amazonaws.services.sqs.model.SendMessageRequest;
public class SQSTry {
public static void main (String args[]) {
System.out.println("SQSTry");
AWSCredentials credentials = null;
try {
credentials = new ProfileCredentialsProvider().getCredentials();
} catch (Exception e) {
throw new AmazonClientException(
"Cannot load the credentials from the credential profiles file. " +
"Please make sure that your credentials file is at the correct " +
"location (~/.aws/credentials), and is in valid format.",
e);
}
AmazonSQS sqs = new AmazonSQSClient(credentials);
Region apNortheast1 = Region.getRegion(Regions.AP_NORTHEAST_1);
sqs.setRegion(apNortheast1);
System.out.println("===========================================");
System.out.println("Getting Started with Amazon SQS");
System.out.println("===========================================\n");
}
}
4. Now package command
mvn package
The above command was run against the pom.xml in the root of aws-try directory.
This gives the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: com/amazonaws/AmazonClientException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2625)
at java.lang.Class.getMethod0(Class.java:2866)
at java.lang.Class.getMethod(Class.java:1676)
at sun.launcher.LauncherHelper.getMainMethod(LauncherHelper.java:494)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:486)
Caused by: java.lang.ClassNotFoundException: com.amazonaws.AmazonClientException
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 6 more
I have added the dependency correctly. If you have noticed the above SQSTry.java file, the AWSCredentials was also a package from amazon, but id does not give any error.
What am I missing ?

You need to add maven-shade-plugin to the pom.xml which packages all AWS sdk jars to a standalone jar file.
Adding the following worked for me:
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
I found this solution from here.

Can you try mvn clean install. Also verify if you are using the right version for the SDK
Try adding
<!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-core -->
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-core</artifactId>
<version>1.11.78</version>
</dependency>

Maven error with Java 8

Getting an error with Maven and Java 8 (jdk1.8.0_45). This issue does not occur with Java 7.
MCVE
Create a sample maven project. For example:
mvn archetype:create -DgroupId=testinovke -DartifactId=testinvoke
Create the following content in the generated App.java file
package testinovke;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
public class App {
public static MethodHandles.Lookup lookup;
public static class Check {
public void primitive(final int i){
}
public void wrapper(final Integer i){
}
}
public static void main(String[] args) throws Throwable {
Check check = new Check();
MethodType type = MethodType.methodType(void.class, int.class);
MethodHandle mh = lookup.findVirtual(Check.class, "primitive", type);
mh.invoke();
}
}
Compile the maven project:
mvn clean compile
Output
Get the following error:
testinvoke/src/main/java/testinovke/App.java:[25,18] method invoked with incorrect number of arguments; expected 0, found 1
Tried it with both Maven 3.0.4 and 3.3.3.
This issue does not exist if I directly compile against App.java using Javac command.

Add plugin configuration for the compiler:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<verbose>true</verbose>
<fork>true</fork>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>

Another solution is adding these properties:
<properties>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
</properties>
to your pom.xml, and the plugins will pick these up automatically.

Very simple step by step JBehave setup tutorial?

Though I have read many, but many articles on how to use JBehave, I can't get it to work. Here are the steps I went through so far:
Created new Java Project
Downloaded JBehave JAR file version 3.6.8 and added it to my build path libraries
Created a package called com.wmi.tutorials.bdd.stack.specs under the test source folder in my workspace
Added the JBehave JAR file to my Build path Library configuration
Created a JBehave story in the above-mentioned package (StackBehaviourStories.story)
Created a Java class in the above-mentioned package (StackBehaviourStory.java)
Created a Java class in the above-mentioned package (StackBehaviourSteps.java)
Imported the Given, Named, Then, When annotations in my Java class
Written two different scenarios in my JBehave story file
And still, I can't get it to work/run! =(
The story file:
Narrative:
In order to learn to with JBehave using Eclipse
As a junior Java developer though senior in .Net and in BDD
I want to define the behaviour of a custom stack
Scenario: I push an item onto the stack
Given I have an empty stack
When I push an item 'orange'
Then I should count 1
Scenario: I pop from the stack
Given I have an empty stack
When I push an item 'apple'
And I pop the stack
Then I should count 0
The story class
package com.wmi.tutorials.bdd.stack.specs
import org.jbehave.core.configuration.MostUsefulConfiguration;
import org.jbehave.core.junit.JUnitStory;
public class StackBehaviourStory extends JUnitStory {
#Override
public Configuration configuration() { return new MostUsefulConfiguration(); }
#Override
public InjectableStepsFactory stepsFactory() {
return new InstanceStepsFactory(configuration()
, new StackBehaviourSteps());
}
}
The steps class
package com.wmi.tutorials.bdd.stack.specs
import org.jbehave.core.annotations.Given;
import org.jbehave.core.annotations.Named;
import org.jbehave.core.annotations.Then;
import org.jbehave.core.annotations.When;
import org.jbehave.core.junit.Assert;
public class StackBehaviourSteps {
#Given("I have an empty stack")
public void givenIHaveAnEmptyStack() { stack = new CustomStack(); }
#When("I push an item $item")
public void whenIPushAnItem(#Named("item") String item) { stack.push(item); }
#Then("I should count $expected")
public void thenIShouldCount(#Named("expected") int expected) {
int actual = stack.count();
if (actual != expected)
throw new RuntimeException("expected:"+expected+";actual:"+actual);
}
}
I'm currently using Eclipse Kepler (4.3) JEE with everything I need to use JUnit, Google App Engine, and yes, JBehave is installed correctly following the Eclipse JBehave installation tutorial.
I can't get it to work. So how can I make it work correctly using Eclipse, JBehave and JUnit?

I know I'm late to the party here but I'm posting because this is the info I wish I had a week ago as it would've saved me a lot of pain. I'm very much into the idea of BDD, but am unfortunately finding JBehave's docs to be a bit of a nightmare, especially when it comes to Maven integration. Moreover a lot of the code I found both on their website and elsewhere didn't work. Through trial and error, and lots of tutorials, I was able to piece together the following. It runs both in Maven and Eclipse, has a single binding class that maps stories to step files, and is able to find story files located in src/test/resources.
here is a working pom file:
<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>com.projectvalis.st1</groupId>
<artifactId>st1</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>st1</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<compilerArgument></compilerArgument>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${failsafe.and.surefire.version}</version>
<executions>
<execution>
<id>integration-test</id>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
</execution>
</executions>
<configuration>
<includes>
<include>**/*Test.java</include>
</includes>
</configuration>
</plugin>
<plugin>
<groupId>org.jbehave</groupId>
<artifactId>jbehave-maven-plugin</artifactId>
<version>4.0.2</version>
<executions>
<execution>
<id>run-stories-as-embeddables</id>
<phase>integration-test</phase>
<configuration>
<includes>
<include>**/*Test.java</include>
</includes>
<ignoreFailureInStories>false</ignoreFailureInStories>
<ignoreFailureInView>false</ignoreFailureInView>
<systemProperties>
<property>
<name>java.awt.headless</name>
<value>true</value>
</property>
</systemProperties>
</configuration>
<goals>
<goal>run-stories-as-embeddables</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.0.1</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.0.1</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>org.jbehave</groupId>
<artifactId>jbehave-core</artifactId>
<version>4.0.2</version>
</dependency>
</dependencies>
</project>
here is a sample story file
Narrative:
In order to work with files to compress
As a guy who wants to win a bet with cameron
I want to ensure files are ingested and processed in the manner in which the
methods in the ingest class purport to process them.
Scenario: Simple test to give JBehave a test drive
Given a file, a.log
When the caller loads the file as a byte array
Then the byte array that is returned contains the correct number of bytes.
here is a sample step file
package com.projectvalis.compUtils.tests.ingest;
import java.io.File;
import org.jbehave.core.annotations.Given;
import org.jbehave.core.annotations.Named;
import org.jbehave.core.annotations.Then;
import org.jbehave.core.annotations.When;
import org.jbehave.core.steps.Steps;
import org.junit.Assert;
import com.projectvalis.compUtils.util.fileIO.Ingest;
/**
* BDD tests for the ingest class
* #author funktapuss
*
*/
public class LoadByteSteps extends Steps {
private String fNameS;
private byte[] byteARR;
#Given("a file, $filename")
public void setFileName(#Named("filename") String filename) {
File file = new File(getClass().getResource("/" + filename).getFile());
fNameS = file.getPath();
}
#When("the caller loads the file as a byte array")
public void loadFile() {
byteARR = Ingest.loadFile(fNameS);
}
#Then("the byte array that is returned contains the "
+ "correct number of bytes.")
public void checkArrSize() {
File file = new File(fNameS);
Assert.assertTrue(
"loading error - "
+ "the file and the resultant byte array are different sizes!",
(long)byteARR.length == file.length());
}
}
and here is the generic runner
package com.projectvalis.compUtils.tests.runner;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.jbehave.core.configuration.Configuration;
import org.jbehave.core.configuration.MostUsefulConfiguration;
import org.jbehave.core.io.CodeLocations;
import org.jbehave.core.io.LoadFromClasspath;
import org.jbehave.core.io.StoryFinder;
import org.jbehave.core.junit.JUnitStories;
import org.jbehave.core.reporters.Format;
import org.jbehave.core.reporters.StoryReporterBuilder;
import org.jbehave.core.steps.InjectableStepsFactory;
import org.jbehave.core.steps.InstanceStepsFactory;
import org.jbehave.core.steps.Steps;
import com.projectvalis.compUtils.tests.ingest.LoadByteSteps;
/**
* generic binder for all JBehave tests. Binds all the story files to the
* step files. works for both Eclipse and Maven command line build.
* #author funktapuss
*
*/
public class JBehaveRunner_Test extends JUnitStories {
#Override
public Configuration configuration() {
return new MostUsefulConfiguration()
.useStoryLoader(
new LoadFromClasspath(this.getClass().getClassLoader()))
.useStoryReporterBuilder(
new StoryReporterBuilder()
.withDefaultFormats()
.withFormats(Format.HTML, Format.CONSOLE)
.withRelativeDirectory("jbehave-report")
);
}
#Override
public InjectableStepsFactory stepsFactory() {
ArrayList<Steps> stepFileList = new ArrayList<Steps>();
stepFileList.add(new LoadByteSteps());
return new InstanceStepsFactory(configuration(), stepFileList);
}
#Override
protected List<String> storyPaths() {
return new StoryFinder().
findPaths(CodeLocations.codeLocationFromClass(
this.getClass()),
Arrays.asList("**/*.story"),
Arrays.asList(""));
}
}
the runner lives in src/test/java//tests.runner.
the ingest test lives in src/test/java//tests.ingest.
the story files live in src/test/resources/stories.
As far as I can tell, JBehave has LOTS of options, so this certainly isn't the only way of doing things. Treat this like a template that will get you up and running quickly.
full source is on github.

Following step by step closely the jbehave Getting Started tutorial, the Run story section says: [...] the ICanToggleACell.java class will allow itself to run as a JUnit test.
This means that the JUnit library is required in your Build path.
Using Eclipse:
Select your current project and right-click it, Build path, Configure Build Path...
Properties for [current project], Java Build Path, Libraries, click [Add Library...]
Add Library, select JUnit, click [Next]
JUnit Library, JUnit library version, select the version you wish to use, click [Finish]
Java Build Path, click [OK]
Project Explorer, select your ICanToggleACell.java class, right-click it, then Run As, and click on JUnit Test
So this is the same here as for the above-example code. The StackBehaviourStory.java class should let itself run as a JUnit test after you add the proper library to the Java build path.

In my case, I have extended my Steps class from Steps (from jbehave core)

i had updated the JunitStory to JunitStories and it worked
public class StackBehaviourStory extends JUnitStory ---> JunitStories