├── .gitignore
├── README.md
├── build.gradle
└── src
    ├── main
        └── java
        │   └── com
        │       └── example
        │           └── project
        │               └── Hello.java
    └── test
        └── java
            └── com
                └── example
                    └── project
                        └── TestHello.java


/.gitignore:
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1 | build/
2 | .gradle/
3 | 


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/README.md:
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 1 | # Autograding Example: Java
 2 | This example project is written in Java, and tested with Gradle/JUnit.
 3 | 
 4 | ### The assignment
 5 | The tests are currently failing because of an output mismatch. Fixing the `System.out.println` in the main method will make the tests green.
 6 | 
 7 | ### Setup command
 8 | N/A
 9 | 
10 | ### Run command
11 | `gradle test`
12 | 
13 | ### Notes
14 | - The JDK is installed on GitHub Actions machines, so you're also able to directly invoke `javac`, `java`, or any other CLI command included in the JDK. 
15 | 


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/build.gradle:
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 1 | plugins {
 2 | 	id 'java'
 3 | }
 4 | 
 5 | repositories {
 6 | 	mavenCentral()
 7 | }
 8 | 
 9 | dependencies {
10 | 	testImplementation('org.junit.jupiter:junit-jupiter:5.6.0')
11 | }
12 | 
13 | test {
14 | 	useJUnitPlatform()
15 | 	testLogging {
16 | 		events "passed", "skipped", "failed"
17 | 	}
18 | }
19 | 


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/src/main/java/com/example/project/Hello.java:
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 1 | package com.example.project;
 2 | 
 3 | public class Hello {
 4 | 
 5 | 	public static void main(final String[] args) {
 6 | 		System.out.println("Not the right string, tests will fail!");
 7 | 	}
 8 | 
 9 | }
10 | 
11 | 


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/src/test/java/com/example/project/TestHello.java:
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 1 | package com.example.project;
 2 | 
 3 | import static org.junit.jupiter.api.Assertions.assertEquals;
 4 | 
 5 | import org.junit.jupiter.api.DisplayName;
 6 | import org.junit.jupiter.api.Test;
 7 | import org.junit.jupiter.params.ParameterizedTest;
 8 | import org.junit.jupiter.params.provider.CsvSource;
 9 | 
10 | import java.io.*;
11 | 
12 | public class TestHello {
13 | 
14 |    @Test
15 |    public void testHelloWorld()
16 |    {
17 |      PrintStream originalOut = System.out;
18 |      ByteArrayOutputStream bos = new ByteArrayOutputStream();
19 |      System.setOut(new PrintStream(bos));
20 | 
21 |      // action
22 |      Hello.main(null);
23 | 
24 |      // assertion
25 |      assertEquals("Hello world!\n", bos.toString());
26 | 
27 |      // undo the binding in System
28 |      System.setOut(originalOut);
29 |    }
30 | }
31 | 


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