final Method toStringMethod = ClassUtil.getMethod(getClass(), "toString");
        assertThat(MethodUtil.isToStringMethod(toStringMethod), is(true));
        final Method hashCodeMethod = ClassUtil.getMethod(getClass(), "hashCode");
        assertThat(MethodUtil.isToStringMethod(hashCodeMethod), is(not(true)));
    }

    /**
     * @throws Exception
     */
    @Test

     * {@literal toString()}メソッドかどうか返します。
     *
     * @param method
     *            メソッド。{@literal null}であってはいけません
     * @return {@literal toString()}メソッドなら{@literal true}
     */
    public static boolean isToStringMethod(final Method method) {
        assertArgumentNotNull("method", method);

        return method != null && method.getName().equals("toString") && method.getReturnType() == String.class