[FIXED] Testing main class exit status

Issue

I write simple main class, which requires two arguments "app firstOne secondOne". I want write Junit test to check, that user put right count of arguments

public static void main(String[] args) {
        if (args.length == 2) {
            someMethod();

            System.exit(1);
        } else
            System.exit(0);
    }

And i want check which exit status return.

I found solmething using

@Rule
public final ExpectedSystemExit exit = ExpectedSystemExit.none();

But it do not find lib (I am using now Junit version 4.13.beta-1)

  org.junit.contrib.java.lang.system.ExpectedSystemExit

Have You any idea how to write test which will check right number of argument passed to program?

Solution

You should add the System Rules library.

Maven:

<dependency>
    <groupId>com.github.stefanbirkner</groupId>
    <artifactId>system-rules</artifactId>
    <version>1.19.0</version>
    <scope>test</scope>
</dependency>

Gradle:

testCompile group: 'com.github.stefanbirkner', name: 'system-rules', version: '1.19.0'

Answered By - Mohsen
Answer Checked By - Marilyn (JavaFixing Volunteer)