TestCase 라는 인터페이스의 의도를 드러내도록 메소드 명 변경

GuavaTest1.java

package com.springapp.mvc;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

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) {
        GuavaTest1 testInstance = new GuavaTest1();

        test("preconditions.checkNotNull", testInstance, "testArrayElement",new String[]{"Dustin", "java"}, 3);

        test("precondition.checkArgument", testInstance,"testDivisorNotZero",0);

        test("Preconditions.checkElementIndex", testInstance,"testForNonNullArgument",null);

        test("Preconditions.checkPositionIndex", testInstance,"testarrayPosition", new String[]{"Dustin", "java"}, 3);

        test("Preconditions.checkState", testInstance,"testState");
    }

    private static void test(String message, Object testInstance, String testName,Object... parameters) {
        printHeader(message);
        try{
            TestMethodInvoker testcase = new TestMethodInvoker() {
                @Override
                public void invoker(Object testInstance, String testName, Object[] parmeters) throws InvocationTargetException, IllegalAccessException {
                    for (Method each : GuavaTest1.class.getMethods()) {

                        if (
                                each.getName().startsWith("test")
                                        || each.getReturnType().equals("void")) {
                            //each.
                            if (each.getName().equals(testName)) {
                                if (null == parmeters) {
                                    each.invoke(testInstance);
                                } else {
                                    each.invoke(testInstance, parmeters);
                                }

                            }

                        }
                    }
                }

            };
           testcase.invoker(testInstance, testName, parameters);
        }catch(Exception e){
            e.printStackTrace();
        }
    }

}

TestMethodInvoker.java

package com.springapp.mvc;

import java.lang.reflect.InvocationTargetException;

public interface TestMethodInvoker {

    void invoker(Object testInstance, String testName, Object[] parameters) throws InvocationTargetException, IllegalAccessException;
}