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First, this runner compiles the project and generate all jars (project + dependencies).

At each play, it compiles the user's answer using javac and run the specified test case using JUnit 4.

How to Use

To use this runner for your project, edit the techio.yml file and add the following lines to your project:

runner: techio/java-maven3-junit4-runner:1.1.4-java-8


A Git repository example

├── techio.yml
├── markdowns
│   └── <YOUR_LESSONS>.md
└── projects
    └── example                    # Your project root
        ├── src/main/java
        │   └──       # The stub provided to the user
        └── src/test/java
            └──   # Your JUnitTest Class

In your java project

public class Example
     * This method should return the sum between a and b
    public void sum(int a, int b) {
        return 1;

import static org.junit.Assert.assertEquals;
public class ExampleTest {
    private Example example;
    public void init() {
        example = new Example();

    public void testSum(){
        int a = 23487;
        int b = 240587;
        assertEquals(example.sum(a, b), a + b);

In your lesson

@[Fix the method sum() to have it return a sum of the integers passed as parameters]({"stubs": ["src/main/java/"],"command": "ExampleTest#testSum"})
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