Find minior array Junit

I have a program in Java, there is minor of all arrays:

public int minorArray(int a[]) {
    int largo = a.length;
    int menor = 10000;  

    for (int i = 0; i < large; i++) {
        if (a[i] < minor) 
        {
            minor = a[i];                 
        }
    }

    return minor;
}

I have to make a test case with JUnit, to verify that I found that minor. What method would you recommend?