test/jalview/gui/ProgressBarTest.java

   1 package jalview.gui;
   2
   3 import static org.testng.AssertJUnit.assertEquals;
   4 import static org.testng.AssertJUnit.assertTrue;
   5 import org.testng.annotations.Test;
   6 import org.testng.Assert;
   7 import java.awt.Component;
   8 import java.awt.FlowLayout;
   9 import java.awt.GridLayout;
  10
  11 import javax.swing.JLabel;
  12 import javax.swing.JPanel;
  13
  14 public class ProgressBarTest
  15 {
  16
  17   private JPanel statusPanel;
  18
  19   private JLabel statusBar;
  20
  21   @Test
  22   public void testConstructor_prematureInstantiation()
  23   {
  24     try
  25     {
  26       new ProgressBar(null, null);
  27       Assert.fail("Expected exception");
  28     } catch (NullPointerException e)
  29     {
  30       // expected
  31     }
  32   }
  33
  34   @Test
  35   public void testConstructor_wrongLayout()
  36   {
  37     statusPanel = new JPanel();
  38     statusPanel.setLayout(new FlowLayout());
  39     try
  40     {
  41       new ProgressBar(statusPanel, null);
  42       Assert.fail("expected exception");
  43     } catch (IllegalArgumentException e)
  44     {
  45       // expected
  46     }
  47   }
  48
  49   @Test
  50   public void testSetProgressBar()
  51   {
  52     statusPanel = new JPanel();
  53     GridLayout layout = new GridLayout(1, 1);
  54     statusPanel.setLayout(layout);
  55     statusBar = new JLabel("nothing");
  56     ProgressBar pb = new ProgressBar(statusPanel, statusBar);
  57
  58     /*
  59      * Add 'hello'
  60      */
  61     pb.setProgressBar("hello", 1L);
  62     verifyProgress(layout, new String[]
  63     { "hello" });
  64
  65     /*
  66      * Add 'world'
  67      */
  68     pb.setProgressBar("world", 2L);
  69     verifyProgress(layout, new String[]
  70     { "hello", "world" });
  71
  72     /*
  73      * Remove 'hello' with no status bar update
  74      */
  75     pb.setProgressBar(null, 1L);
  76     verifyProgress(layout, new String[]
  77     { "world" });
  78     assertEquals("nothing", statusBar.getText());
  79
  80     /*
  81      * Remove 'world' with status bar update
  82      */
  83     pb.setProgressBar("goodbye", 2L);
  84     verifyProgress(layout, new String[]
  85     {});
  86     assertEquals("goodbye", statusBar.getText());
  87   }
  88
  89   /**
  90    * Verify the right number of progress bars containing the expected messages
  91    * respectively
  92    *
  93    * @param layout
  94    * @param msgs
  95    */
  96   private void verifyProgress(GridLayout layout, String[] msgs)
  97   {
  98     int msgCount = msgs.length;
  99     assertEquals(1 + msgCount, layout.getRows());
 100     assertEquals(msgCount, statusPanel.getComponentCount());
 101     int i = 0;
 102     for (Component c : statusPanel.getComponents())
 103     {
 104       assertTrue(c instanceof JPanel);
 105       assertTrue(((JPanel) c).getComponent(0) instanceof JLabel);
 106       assertEquals(msgs[i++],
 107               ((JLabel) ((JPanel) c).getComponent(0)).getText());
 108     }
 109   }
 110 }