package jalview.gui;

import static org.junit.Assert.assertEquals;

import javax.swing.JScrollBar;

import org.junit.Test;

public class JvSwingUtilsTest
{

  @Test
  public void testGetScrollBarProportion()
  {
    /*
     * orientation, value, extent (width), min, max
     */
    JScrollBar sb = new JScrollBar(0, 125, 50, 0, 450);

    /*
     * operating range is 25 - 425 (400 wide) so value 125 is 100/400ths of this
     * range
     */
    assertEquals(0.25f, JvSwingUtils.getScrollBarProportion(sb), 0.001f);
  }

  @Test
  public void testGetScrollValueForProportion()
  {
    /*
     * orientation, value, extent (width), min, max
     */
    JScrollBar sb = new JScrollBar(0, 125, 50, 0, 450);

    /*
     * operating range is 25 - 425 (400 wide) so value 125 is a quarter of this
     * range
     */
    assertEquals(125, JvSwingUtils.getScrollValueForProportion(sb, 0.25f));
  }
}