/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ---------------
* RangeTests.java
* ---------------
* (C) Copyright 2003-2014, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Sergei Ivanov;
*
* Changes
* -------
* 14-Aug-2003 : Version 1 (DG);
* 18-Dec-2007 : Additional tests from Sergei Ivanov (DG);
* 08-Jan-2012 : Added test for combine() method (DG);
* 23-Feb-2014 : Added isNaNRange() test (DG);
*
*/
package org.jfree.data;
import org.jfree.chart.TestUtils;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* Tests for the {@link Range} class.
*/
public class RangeTest {
/**
* Confirm that the constructor initializes all the required fields.
*/
@Test
public void testConstructor() {
Range r1 = new Range(0.1, 1000.0);
assertEquals(r1.getLowerBound(), 0.1, 0.0d);
assertEquals(r1.getUpperBound(), 1000.0, 0.0d);
try {
/*Range r2 =*/ new Range(10.0, 0.0);
fail("Lower bound cannot be greater than the upper");
}
catch (Exception e) {
// expected
}
}
/**
* Confirm that the equals method can distinguish all the required fields.
*/
@Test
public void testEquals() {
Range r1 = new Range(0.0, 1.0);
Range r2 = new Range(0.0, 1.0);
assertEquals(r1, r2);
assertEquals(r2, r1);
r1 = new Range(0.0, 1.0);
r2 = new Range(0.5, 1.0);
assertFalse(r1.equals(r2));
r1 = new Range(0.0, 1.0);
r2 = new Range(0.0, 2.0);
assertFalse(r1.equals(r2));
// a Range object cannot be equal to a different object type
assertFalse(r1.equals(new Double(0.0)));
}
/**
* Two objects that are equal are required to return the same hashCode.
*/
@Test
public void testHashCode() {
Range a1 = new Range(1.0, 100.0);
Range a2 = new Range(1.0, 100.0);
assertEquals(a1.hashCode(), a2.hashCode());
a1 = new Range(-100.0, 2.0);
a2 = new Range(-100.0, 2.0);
assertEquals(a1.hashCode(), a2.hashCode());
}
/**
* Simple tests for the contains() method.
*/
@Test
public void testContains() {
Range r1 = new Range(0.0, 1.0);
assertFalse(r1.contains(Double.NaN));
assertFalse(r1.contains(Double.NEGATIVE_INFINITY));
assertFalse(r1.contains(-1.0));
assertTrue(r1.contains(0.0));
assertTrue(r1.contains(0.5));
assertTrue(r1.contains(1.0));
assertFalse(r1.contains(2.0));
assertFalse(r1.contains(Double.POSITIVE_INFINITY));
}
/**
* Tests the constrain() method for various values.
*/
@Test
public void testConstrain() {
Range r1 = new Range(0.0, 1.0);
double d = r1.constrain(0.5);
assertEquals(0.5, d, 0.0000001);
d = r1.constrain(0.0);
assertEquals(0.0, d, 0.0000001);
d = r1.constrain(1.0);
assertEquals(1.0, d, 0.0000001);
d = r1.constrain(-1.0);
assertEquals(0.0, d, 0.0000001);
d = r1.constrain(2.0);
assertEquals(1.0, d, 0.0000001);
d = r1.constrain(Double.POSITIVE_INFINITY);
assertEquals(1.0, d, 0.0000001);
d = r1.constrain(Double.NEGATIVE_INFINITY);
assertEquals(0.0, d, 0.0000001);
d = r1.constrain(Double.NaN);
assertTrue(Double.isNaN(d));
}
/**
* Simple tests for the intersects() method.
*/
@Test
public void testIntersects() {
Range r1 = new Range(0.0, 1.0);
assertFalse(r1.intersects(-2.0, -1.0));
assertFalse(r1.intersects(-2.0, 0.0));
assertTrue(r1.intersects(-2.0, 0.5));
assertTrue(r1.intersects(-2.0, 1.0));
assertTrue(r1.intersects(-2.0, 1.5));
assertTrue(r1.intersects(0.0, 0.5));
assertTrue(r1.intersects(0.0, 1.0));
assertTrue(r1.intersects(0.0, 1.5));
assertTrue(r1.intersects(0.5, 0.6));
assertTrue(r1.intersects(0.5, 1.0));
assertTrue(r1.intersects(0.5, 1.5));
assertFalse(r1.intersects(1.0, 1.1));
assertFalse(r1.intersects(1.5, 2.0));
}
/**
* A simple test for the expand() method.
*/
@Test
public void testExpand() {
Range r1 = new Range(0.0, 100.0);
Range r2 = Range.expand(r1, 0.10, 0.10);
assertEquals(-10.0, r2.getLowerBound(), 0.001);
assertEquals(110.0, r2.getUpperBound(), 0.001);
// Expand by 0% does not change the range
r2 = Range.expand(r1, 0.0, 0.0);
assertEquals(r1, r2);
try {
Range.expand(null, 0.1, 0.1);
fail("Null value is accepted");
}
catch (Exception e) {
}
// Lower > upper: mid point is used
r2 = Range.expand(r1, -0.8, -0.5);
assertEquals(65.0, r2.getLowerBound(), 0.001);
assertEquals(65.0, r2.getUpperBound(), 0.001);
}
/**
* A simple test for the scale() method.
*/
@Test
public void testShift() {
Range r1 = new Range(10.0, 20.0);
Range r2 = Range.shift(r1, 20.0);
assertEquals(30.0, r2.getLowerBound(), 0.001);
assertEquals(40.0, r2.getUpperBound(), 0.001);
r1 = new Range(0.0, 100.0);
r2 = Range.shift(r1, -50.0, true);
assertEquals(-50.0, r2.getLowerBound(), 0.001);
assertEquals(50.0, r2.getUpperBound(), 0.001);
r1 = new Range(-10.0, 20.0);
r2 = Range.shift(r1, 20.0, true);
assertEquals(10.0, r2.getLowerBound(), 0.001);
assertEquals(40.0, r2.getUpperBound(), 0.001);
r1 = new Range(-10.0, 20.0);
r2 = Range.shift(r1, -30.0, true);
assertEquals(-40.0, r2.getLowerBound(), 0.001);
assertEquals(-10.0, r2.getUpperBound(), 0.001);
r1 = new Range(-10.0, 20.0);
r2 = Range.shift(r1, 20.0, false);
assertEquals(0.0, r2.getLowerBound(), 0.001);
assertEquals(40.0, r2.getUpperBound(), 0.001);
r1 = new Range(-10.0, 20.0);
r2 = Range.shift(r1, -30.0, false);
assertEquals(-40.0, r2.getLowerBound(), 0.001);
assertEquals(0.0, r2.getUpperBound(), 0.001);
// Shifting with a delta of 0 does not change the range
r2 = Range.shift(r1, 0.0);
assertEquals(r1, r2);
try {
Range.shift(null, 0.1);
fail("Null value is accepted");
}
catch (Exception e) {
}
}
/**
* A simple test for the scale() method.
*/
@Test
public void testScale() {
Range r1 = new Range(0.0, 100.0);
Range r2 = Range.scale(r1, 0.10);
assertEquals(0.0, r2.getLowerBound(), 0.001);
assertEquals(10.0, r2.getUpperBound(), 0.001);
r1 = new Range(-10.0, 100.0);
r2 = Range.scale(r1, 2.0);
assertEquals(-20.0, r2.getLowerBound(), 0.001);
assertEquals(200.0, r2.getUpperBound(), 0.001);
// Scaling with a factor of 1 does not change the range
r2 = Range.scale(r1, 1.0);
assertEquals(r1, r2);
try {
Range.scale(null, 0.1);
fail("Null value is accepted");
}
catch (Exception e) {
}
try {
Range.scale(r1, -0.5);
fail("Negative factor accepted");
}
catch (Exception e) {
}
}
/**
* Serialize an instance, restore it, and check for equality.
*/
@Test
public void testSerialization() {
Range r1 = new Range(25.0, 133.42);
Range r2 = (Range) TestUtils.serialised(r1);
assertEquals(r1, r2);
}
private static final double EPSILON = 0.0000000001;
/**
* Some checks for the combine method.
*/
@Test
public void testCombine() {
Range r1 = new Range(1.0, 2.0);
Range r2 = new Range(1.5, 2.5);
assertNull(Range.combine(null, null));
assertEquals(r1, Range.combine(r1, null));
assertEquals(r2, Range.combine(null, r2));
assertEquals(new Range(1.0, 2.5), Range.combine(r1, r2));
Range r3 = new Range(Double.NaN, 1.3);
Range rr = Range.combine(r1, r3);
assertTrue(Double.isNaN(rr.getLowerBound()));
assertEquals(2.0, rr.getUpperBound(), EPSILON);
Range r4 = new Range(1.7, Double.NaN);
rr = Range.combine(r4, r1);
assertEquals(1.0, rr.getLowerBound(), EPSILON);
assertTrue(Double.isNaN(rr.getUpperBound()));
}
/**
* Some checks for the combineIgnoringNaN() method.
*/
@Test
public void testCombineIgnoringNaN() {
Range r1 = new Range(1.0, 2.0);
Range r2 = new Range(1.5, 2.5);
assertNull(Range.combineIgnoringNaN(null, null));
assertEquals(r1, Range.combineIgnoringNaN(r1, null));
assertEquals(r2, Range.combineIgnoringNaN(null, r2));
assertEquals(new Range(1.0, 2.5), Range.combineIgnoringNaN(r1, r2));
Range r3 = new Range(Double.NaN, 1.3);
Range rr = Range.combineIgnoringNaN(r1, r3);
assertEquals(1.0, rr.getLowerBound(), EPSILON);
assertEquals(2.0, rr.getUpperBound(), EPSILON);
Range r4 = new Range(1.7, Double.NaN);
rr = Range.combineIgnoringNaN(r4, r1);
assertEquals(1.0, rr.getLowerBound(), EPSILON);
assertEquals(2.0, rr.getUpperBound(), EPSILON);
}
@Test
public void testIsNaNRange() {
assertTrue(new Range(Double.NaN, Double.NaN).isNaNRange());
assertFalse(new Range(1.0, 2.0).isNaNRange());
assertFalse(new Range(Double.NaN, 2.0).isNaNRange());
assertFalse(new Range(1.0, Double.NaN).isNaNRange());
}
}