Variable arity method tests

JavaTest output

1 []
1 null
1 [null, null]
1 [2]
1 [2, 3]
1 [null]
1 [null, null]

JavaTest.java

package lang;

import org.junit.Test;

import java.util.Arrays;

/**
 * @author Tomoyuki Saito
 */
public class JavaTest {

    private void func(String arg, String... arguments) {
        System.out.printf("%s %s%n", arg, Arrays.toString(arguments));
    }

    @Test
    public void testVariableArityMethod() {
        func("1");
        func("1", null);
        func("1", null, null);
        func("1", "2");
        func("1", "2", "3");
        func("1", new String[]{null});
        func("1", new String[]{null, null});
    }
}