@DataProvider
    public static Object[][] dataOfInkForConstructor() {
        return new Object[][]{
                {1000}, {0}
        };
    }
    //проверяем чернила в конструкторе
    @Test(dataProvider = "dataOfInkForConstructor")
    public void testPenConstructorInt(int i) throws NoSuchFieldException, IllegalAccessException {
        testObj = new Pen(i);
        Field inkField = testObj.getClass().getDeclaredField("inkContainerValue");
        inkField.setAccessible(true);
        Assert.assertEquals(inkField.get(testObj), i);
    }
    @DataProvider
    public static Object[][] dataOfSizeForConstructor() {
        return new Object[][]{
                {2.0}, {0}
        };
    }
    //проверяем размер букв в конструкторе
    @Test(dataProvider = "dataOfSizeForConstructor")
    public void testPenConstructorDouble(double d) throws NoSuchFieldException, IllegalAccessException {
        testObj = new Pen(1000, d);
        Field sizeField = testObj.getClass().getDeclaredField("sizeLetter");
        sizeField.setAccessible(true);
        Assert.assertEquals(sizeField.get(testObj), d);
    }
    @DataProvider
    public static Object[][] dataOfColors() {
        return new Object[][]{
                {"BLUE"}, {"BLACK"}
        };
    }

    //проверяем цвет в конструкторе. БАГ(!)
    @Test(dataProvider = "dataOfColors")
    public void testPenConstructorColor(String s) throws NoSuchFieldException, IllegalAccessException {
        testObj = new Pen(1000, 1.0);
        Field colorField = testObj.getClass().getDeclaredField("color");
        colorField.setAccessible(true);
        Assert.assertEquals(colorField.get(testObj), s);
    }