junit을 쓸 수 없는 상황이라면 guava를 이용한 precondition

gistfile1.java

package loggerTest;
import static com.google.common.base.Preconditions.*;
import static java.lang.System.err;
public class GuavaTest1 {

	private final boolean initialzed = false;

	public void testForNonNullArgument(final String parameter)
	{
		final String localPrameter = checkNotNull(parameter, "null값은"
				+ "허용되지 않습니다.");
	}

	public void testDivisorNotZero(final int divisor){
		checkArgument(divisor != 0, "0으로 나눌 수 없습니다.");
	}

	public void testArrayElement(final String[] strArray,
			final int indexNumber){
		final int index = checkElementIndex(indexNumber, strArray.length,
				"지정된 Array 요소 위치가 벗어났습니다.");
	}

	public void testarrayPosition(final String[] strarray, final int indexNumber){
		final int index = checkPositionIndex(indexNumber, strarray.length,
				"지정된 Array 요소 위치가 벗어났습니다.");
	}

	public void testState(){
		checkState(this.initialzed, "초기화 되지 않았습니다.");
	}

	public static void printHeader(final String newHeaderText){
		err.println("\n=====================");
		err.println("===" + newHeaderText);
		err.println("=======================");
	}


	public static void main(String[] args) {
		final GuavaTest1 test1 = new GuavaTest1();

		printHeader("preconditions.checkNotNull");
		try{
			test1.testForNonNullArgument(null);
		}catch(NullPointerException npe)
		{
			npe.printStackTrace();
		}
		printHeader("precondition.checkArgument");
		try{
			test1.testDivisorNotZero(0);
		}catch(IllegalArgumentException illArgEx){
			illArgEx.printStackTrace();
		}
		printHeader("Preconditions.checkElementIndex");
		try{
			test1.testArrayElement(new String[]{"Dustin","java"},3 );
		}catch(IndexOutOfBoundsException ioobEx){
			ioobEx.printStackTrace();
		}
		printHeader("Preconditions.checkPositionIndex");
		try{
			test1.testarrayPosition(new String[]{"Dustin","java"},3);
		}catch(IndexOutOfBoundsException ioobex){
			ioobex.printStackTrace();
		}
		printHeader("Preconditions.checkState");
		try{
			test1.testState();
		}catch(IllegalStateException illStateEx){
			illStateEx.printStackTrace();
		}
	}
}