X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=test%2Fjalview%2Fext%2Fandroid%2FSparseDoubleArrayTest.java;h=32e344c59d962e40918b4857ae7fdb6644df16fe;hb=e9a1c2c372f4bbf6cf658de3dba73ef326b20c20;hp=58c36e6cea2a9561a14dc79094a4ebb38689aecc;hpb=48388af41cf8ebbbbfecc7b354ab6c32d8af7bac;p=jalview.git

diff --git a/test/jalview/ext/android/SparseDoubleArrayTest.java b/test/jalview/ext/android/SparseDoubleArrayTest.java
index 58c36e6..32e344c 100644
--- a/test/jalview/ext/android/SparseDoubleArrayTest.java
+++ b/test/jalview/ext/android/SparseDoubleArrayTest.java
@@ -1,3 +1,23 @@
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ * 
+ * This file is part of Jalview.
+ * 
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *  
+ * Jalview is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty 
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+ * PURPOSE.  See the GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
 package jalview.ext.android;
 
 import static org.testng.Assert.assertEquals;
@@ -36,4 +56,18 @@ public class SparseDoubleArrayTest
     s.add(12, 9.8d);
     assertEquals(s.get(12), 9.8d);
   }
+
+  @Test
+  public void testDivide()
+  {
+    double delta = 1.0e-10;
+    double[] d = new double[] { 0d, 2.4d, 1.2d, 0d, -4.8d, -3.6d };
+    SparseDoubleArray s = new SparseDoubleArray(d);
+    assertEquals(s.divide(0, 1d), 0d); // no such entry
+    assertEquals(s.divide(2, 0d), 0d); // zero divisor
+    assertEquals(s.divide(1, 2d), 1.2d, delta); // + / +
+    assertEquals(s.divide(2, -2d), -0.6d, delta); // + / -
+    assertEquals(s.divide(4, 3d), -1.6d, delta); // - / +
+    assertEquals(s.divide(5, -3d), 1.2d, delta); // - / -
+  }
 }