X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=test%2Fjalview%2Fgui%2FJvSwingUtilsTest.java;fp=test%2Fjalview%2Fgui%2FJvSwingUtilsTest.java;h=11e6ea5ed5fd1d4c9e41a6b0bd94ceef6e247831;hb=cf491d18e6affbfacfc67eda7c6bceedd457982f;hp=0000000000000000000000000000000000000000;hpb=5dc62d509b6d0f90f3545bf40b272390410eda45;p=jalview.git

diff --git a/test/jalview/gui/JvSwingUtilsTest.java b/test/jalview/gui/JvSwingUtilsTest.java
new file mode 100644
index 0000000..11e6ea5
--- /dev/null
+++ b/test/jalview/gui/JvSwingUtilsTest.java
@@ -0,0 +1,41 @@
+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));
+  }
+}