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
   6 import java.awt.Component;
   7 import java.awt.FlowLayout;
   8 import java.awt.GridLayout;
   9
  10 import javax.swing.JLabel;
  11 import javax.swing.JPanel;
  12
  13 import org.testng.Assert;
  14 import org.testng.annotations.Test;
  15
  16 public class ProgressBarTest
  17 {
  18
  19   private JPanel statusPanel;
  20
  21   private JLabel statusBar;
  22
  23   @Test
  24   public void testConstructor_prematureInstantiation()
  25   {
  26     try
  27     {
  28       new ProgressBar(null, null);
  29       Assert.fail("Expected exception");
  30     } catch (NullPointerException e)
  31     {
  32       // expected
  33     }
  34   }
  35
  36   @Test
  37   public void testConstructor_wrongLayout()
  38   {
  39     statusPanel = new JPanel();
  40     statusPanel.setLayout(new FlowLayout());
  41     try
  42     {
  43       new ProgressBar(statusPanel, null);
  44       Assert.fail("expected exception");
  45     } catch (IllegalArgumentException e)
  46     {
  47       // expected
  48     }
  49   }
  50
  51   @Test
  52   public void testSetProgressBar()
  53   {
  54     statusPanel = new JPanel();
  55     GridLayout layout = new GridLayout(1, 1);
  56     statusPanel.setLayout(layout);
  57     statusBar = new JLabel("nothing");
  58     ProgressBar pb = new ProgressBar(statusPanel, statusBar);
  59
  60     /*
  61      * Add 'hello'
  62      */
  63     pb.setProgressBar("hello", 1L);
  64     verifyProgress(layout, new String[]
  65     { "hello" });
  66
  67     /*
  68      * Add 'world'
  69      */
  70     pb.setProgressBar("world", 2L);
  71     verifyProgress(layout, new String[]
  72     { "hello", "world" });
  73
  74     /*
  75      * Remove 'hello' with no status bar update
  76      */
  77     pb.setProgressBar(null, 1L);
  78     verifyProgress(layout, new String[]
  79     { "world" });
  80     assertEquals("nothing", statusBar.getText());
  81
  82     /*
  83      * Remove 'world' with status bar update
  84      */
  85     pb.setProgressBar("goodbye", 2L);
  86     verifyProgress(layout, new String[]
  87     {});
  88     assertEquals("goodbye", statusBar.getText());
  89   }
  90
  91   /**
  92    * Verify the right number of progress bars containing the expected messages
  93    * respectively
  94    *
  95    * @param layout
  96    * @param msgs
  97    */
  98   private void verifyProgress(GridLayout layout, String[] msgs)
  99   {
 100     int msgCount = msgs.length;
 101     assertEquals(1 + msgCount, layout.getRows());
 102     assertEquals(msgCount, statusPanel.getComponentCount());
 103     int i = 0;
 104     for (Component c : statusPanel.getComponents())
 105     {
 106       assertTrue(c instanceof JPanel);
 107       assertTrue(((JPanel) c).getComponent(0) instanceof JLabel);
 108       assertEquals(msgs[i++],
 109               ((JLabel) ((JPanel) c).getComponent(0)).getText());
 110     }
 111   }
 112 }