1 files changed, 64 insertions, 0 deletions
diff --git a/test/de/lmu/ifi/dbs/elki/math/scales/TestLinearScale.java b/test/de/lmu/ifi/dbs/elki/math/scales/TestLinearScale.java
new file mode 100644
index 00000000..f593902c
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+++ b/test/de/lmu/ifi/dbs/elki/math/scales/TestLinearScale.java
@@ -0,0 +1,64 @@
+package de.lmu.ifi.dbs.elki.math.scales;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2012
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import de.lmu.ifi.dbs.elki.JUnit4Test;
+import de.lmu.ifi.dbs.elki.math.scales.LinearScale;
+
+/**
+ * Test class to test rounding of the linear scale.
+ * 
+ * @author Erich Schubert
+ * 
+ */
+public class TestLinearScale implements JUnit4Test {
+
+  /**
+   * Produces a simple linear scale and verifies the tick lines are placed as
+   * expected.
+   */
+  @Test
+  public final void testLinearScale() {
+    LinearScale a = new LinearScale(3, 97);
+    assertEquals("Minimum for scale 3-97 not as expected.", 0.0, a.getMin(), Double.MIN_VALUE);
+    assertEquals("Maximum for scale 3-97 not as expected.", 100.0, a.getMax(), Double.MIN_VALUE);
+
+    LinearScale b = new LinearScale(-97, -3);
+    assertEquals("Minimum for scale -97 : -3 not as expected.", -100.0, b.getMin(), Double.MIN_VALUE);
+    assertEquals("Maximum for scale -97 : -3 not as expected.", 0.0, b.getMax(), Double.MIN_VALUE);
+
+    LinearScale c = new LinearScale(-3, 37);
+    assertEquals("Minimum for scale -3 : 37 not as expected.", -10.0, c.getMin(), Double.MIN_VALUE);
+    assertEquals("Maximum for scale -3 : 37 not as expected.", 40.0, c.getMax(), Double.MIN_VALUE);
+
+    LinearScale d = new LinearScale(-37, 3);
+    assertEquals("Minimum for scale -37 : 3 not as expected.", -40.0, d.getMin(), Double.MIN_VALUE);
+    assertEquals("Maximum for scale -37 : 3 not as expected.", 10.0, d.getMax(), Double.MIN_VALUE);
+  }
+
+}