JAL-2099 belated unit test

diff --git a/test/jalview/renderer/ScaleRendererTest.java b/test/jalview/renderer/ScaleRendererTest.java
new file mode 100644 (file)
index 0000000..5588ad1
--- /dev/null
+++ b/test/jalview/renderer/ScaleRendererTest.java
@@ -0,0 +1,73 @@
+package jalview.renderer;
+
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.assertNull;
+import static org.testng.Assert.assertTrue;
+
+import jalview.gui.AlignFrame;
+import jalview.gui.AlignViewport;
+import jalview.io.DataSourceType;
+import jalview.io.FileLoader;
+import jalview.renderer.ScaleRenderer.ScaleMark;
+
+import java.util.List;
+
+import org.testng.annotations.Test;
+
+public class ScaleRendererTest
+{
+  @Test
+  public void testCalculateMarks()
+  {
+    String data = ">Seq/20-45\nABCDEFGHIJKLMNOPQRSTUVWXYS\n";
+    AlignFrame af = new FileLoader().LoadFileWaitTillLoaded(data,
+            DataSourceType.PASTE);
+    AlignViewport av = af.getViewport();
+
+    /*
+     * scale has minor ticks at 5 and 15, major at 10 and 20
+     * (these are base 1, ScaleMark holds base 0 values)
+     */
+    List<ScaleMark> marks = new ScaleRenderer().calculateMarks(av, 0, 25);
+    assertEquals(marks.size(), 4);
+
+    assertFalse(marks.get(0).major);
+    assertEquals(marks.get(0).column, 4);
+    assertNull(marks.get(0).text);
+
+    assertTrue(marks.get(1).major);
+    assertEquals(marks.get(1).column, 9);
+    assertEquals(marks.get(1).text, "10");
+
+    assertFalse(marks.get(2).major);
+    assertEquals(marks.get(2).column, 14);
+    assertNull(marks.get(2).text);
+
+    assertTrue(marks.get(3).major);
+    assertEquals(marks.get(3).column, 19);
+    assertEquals(marks.get(3).text, "20");
+
+    /*
+     * now hide columns 9-11 and 18-20 (base 1)
+     * scale marks are now in the same columns as before, but
+     * with column numbering adjusted for hidden columns
+     */
+    av.hideColumns(8, 10);
+    av.hideColumns(17, 19);
+    marks = new ScaleRenderer().calculateMarks(av, 0, 25);
+    assertEquals(marks.size(), 4);
+    assertFalse(marks.get(0).major);
+    assertEquals(marks.get(0).column, 4);
+    assertNull(marks.get(0).text);
+    assertTrue(marks.get(1).major);
+    assertEquals(marks.get(1).column, 9);
+    assertEquals(marks.get(1).text, "13"); // +3 hidden columns
+    assertFalse(marks.get(2).major);
+    assertEquals(marks.get(2).column, 14);
+    assertNull(marks.get(2).text);
+    assertTrue(marks.get(3).major);
+    assertEquals(marks.get(3).column, 19);
+    assertEquals(marks.get(3).text, "26"); // +6 hidden columns
+  }
+}