eliashkan / jupiter-is-all-i-need

A project to illustrate unit testing with JUnit Jupiter

A simple setup

You only need to import the junit.jupiter dependency to get access to the API, parameterized tests and the engine.

<dependencies>

    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter</artifactId>
        <version>5.6.2</version>
        <scope>test</scope>
    </dependency>

</dependencies>

A simple program

Say my name should only say a name

    public String methodToTestWhichShouldReturnMyName() {
        return "ELIAS";
    }

A simple test

The unit test for this program checks if the correct name is actually returned.

@Test
void testMyName() {
    SayMyName smn = new SayMyName();
    String result = smn.methodToTestWhichShouldReturnMyName();
    assertTrue(
            "elias".equalsIgnoreCase(result),
            "this method should return my name!");

}

assertTrue() is a static method from the org.junit.jupiter.api.Assertions class. This method is called statically by using a static import statement at the top of the file

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