@Test
    public void testGetNumberInRange() {
        Range range = new Range(3, 4);
        double number = GraphDeveloper.getNumberInRange(range);
        assertTrue(number >= 3 && number <= 4);

        range = new Range(4, 4);
        number = GraphDeveloper.getNumberInRange(range);
        assertEquals(4, number, 0.00000001);
    }