@Test
public void testArithmeticMinorTickInterval() throws Exception {
ChartManager.setLogarithmic(chart, false);
assertNull(yAxis.getMinorTickInterval());
}
@Test
public void testLogarithmicMinorTickInterval() throws Exception {
ChartManager.setLogarithmic(chart, true);
assertEquals(0.1, yAxis.getMinorTickInterval());
}