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- /* ===========================================================
- * JFreeChart : a free chart library for the Java(tm) platform
- * ===========================================================
- *
- * (C) Copyright 2000-2013, 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.]
- *
- * ------------------------
- * LogarithmicAxisTest.java
- * ------------------------
- * (C) Copyright 2003-2013, by Object Refinery Limited and Contributors.
- *
- * Original Author: David Gilbert (for Object Refinery Limited);
- * Contributor(s): -;
- *
- * Changes
- * -------
- * 26-Mar-2003 : Version 1 (DG);
- * 02-Mar-2007 : Added tests from bug report 880597 (DG);
- *
- */
- package org.jfree.chart.axis;
- import static org.junit.Assert.assertEquals;
- import static org.junit.Assert.assertFalse;
- import java.awt.geom.Rectangle2D;
- import org.jfree.chart.TestUtilities;
- import org.jfree.ui.RectangleEdge;
- import org.junit.Before;
- import org.junit.Test;
- /**
- * Tests for the {@link LogarithmicAxis} class.
- */
- public class LogarithmicAxisTest {
- static class MyLogarithmicAxis extends LogarithmicAxis {
- /**
- * Creates a new instance.
- *
- * @param label the label.
- */
- public MyLogarithmicAxis(String label) {
- super(label);
- }
- /* (non-Javadoc)
- * @see org.jfree.chart.axis.LogarithmicAxis#switchedLog10(double)
- */
- @Override
- protected double switchedLog10(double val) {
- return super.switchedLog10(val);
- }
- }
- /** Tolerance for floating point comparisons */
- public static double EPSILON = 0.000001;
- MyLogarithmicAxis axis = null;
- /**
- * Sets up a new axis.
- *
- * @throws Exception
- */
- @Before
- public void setUp() throws Exception {
- this.axis = new MyLogarithmicAxis("Value (log)");
- this.axis.setAllowNegativesFlag(false);
- this.axis.setLog10TickLabelsFlag(false);
- this.axis.setLowerMargin(0.0);
- this.axis.setUpperMargin(0.0);
- this.axis.setLowerBound(0.2);
- this.axis.setUpperBound(100.0);
- }
- /**
- * Serialize an instance, restore it, and check for equality.
- */
- @Test
- public void testSerialization() {
- LogarithmicAxis a1 = new LogarithmicAxis("Test Axis");
- LogarithmicAxis a2 = (LogarithmicAxis) TestUtilities.serialised(a1);
- assertEquals(a1, a2);
- }
- /**
- * Test if adjustedLog10 and adjustedPow10 are inverses of each other
- */
- @Test
- public void testAdjustedLog10() {
- checkLogPowRoundTrip(20);
- checkLogPowRoundTrip(10);
- checkLogPowRoundTrip(5);
- checkLogPowRoundTrip(2);
- checkLogPowRoundTrip(1);
- checkLogPowRoundTrip(0.5);
- checkLogPowRoundTrip(0.2);
- checkLogPowRoundTrip(0.0001);
- }
- private void checkLogPowRoundTrip(double value) {
- assertEquals("log(pow(x)) = x", value, this.axis.adjustedLog10(
- this.axis.adjustedPow10(value)), EPSILON);
- assertEquals("pow(log(x)) = x", value, this.axis.adjustedPow10(
- this.axis.adjustedLog10(value)), EPSILON);
- }
- /**
- * Test if switchedLog10 and switchedPow10 are inverses of each other
- */
- @Test
- public void testSwitchedLog10() {
- assertFalse("Axis should not allow negative values",
- this.axis.getAllowNegativesFlag());
- assertEquals(Math.log(0.5) / LogarithmicAxis.LOG10_VALUE,
- this.axis.switchedLog10(0.5), EPSILON);
- checkSwitchedLogPowRoundTrip(20);
- checkSwitchedLogPowRoundTrip(10);
- checkSwitchedLogPowRoundTrip(5);
- checkSwitchedLogPowRoundTrip(2);
- checkSwitchedLogPowRoundTrip(1);
- checkSwitchedLogPowRoundTrip(0.5);
- checkSwitchedLogPowRoundTrip(0.2);
- checkSwitchedLogPowRoundTrip(0.0001);
- }
- private void checkSwitchedLogPowRoundTrip(double value) {
- assertEquals("log(pow(x)) = x", value, this.axis.switchedLog10(
- this.axis.switchedPow10(value)), EPSILON);
- assertEquals("pow(log(x)) = x", value, this.axis.switchedPow10(
- this.axis.switchedLog10(value)), EPSILON);
- }
- /**
- * Test of java2DToValue method.
- */
- @Test
- public void testJava2DToValue() {
- Rectangle2D plotArea = new Rectangle2D.Double(22, 33, 500, 500);
- RectangleEdge edge = RectangleEdge.BOTTOM;
- // set axis bounds to be both greater than 1
- this.axis.setRange(10, 20);
- checkPointsToValue(edge, plotArea);
- // check for bounds interval that includes 1
- this.axis.setRange(0.5, 10);
- checkPointsToValue(edge, plotArea);
- // check for bounds interval that includes 1
- this.axis.setRange(0.2, 20);
- checkPointsToValue(edge, plotArea);
- // check for both bounds smaller than 1
- this.axis.setRange(0.2, 0.7);
- checkPointsToValue(edge, plotArea);
- }
- /**
- * Test of valueToJava2D method.
- */
- @Test
- public void testValueToJava2D() {
- Rectangle2D plotArea = new Rectangle2D.Double(22, 33, 500, 500);
- RectangleEdge edge = RectangleEdge.BOTTOM;
- // set axis bounds to be both greater than 1
- this.axis.setRange(10, 20);
- checkPointsToJava2D(edge, plotArea);
- // check for bounds interval that includes 1
- this.axis.setRange(0.5, 10);
- checkPointsToJava2D(edge, plotArea);
- // check for bounds interval that includes 1
- this.axis.setRange(0.2, 20);
- checkPointsToJava2D(edge, plotArea);
- // check for both bounds smaller than 1
- this.axis.setRange(0.2, 0.7);
- checkPointsToJava2D(edge, plotArea);
- }
- private void checkPointsToJava2D(RectangleEdge edge,
- Rectangle2D plotArea) {
- assertEquals("Left most point on the axis should be beginning of "
- + "range.", plotArea.getX(), this.axis.valueToJava2D(
- this.axis.getLowerBound(), plotArea, edge), EPSILON);
- assertEquals("Right most point on the axis should be end of range.",
- plotArea.getX() + plotArea.getWidth(),
- this.axis.valueToJava2D(this.axis.getUpperBound(),
- plotArea, edge), EPSILON);
- assertEquals("Center point on the axis should geometric mean of the bounds.",
- plotArea.getX() + (plotArea.getWidth() / 2),
- this.axis.valueToJava2D(Math.sqrt(this.axis.getLowerBound()
- * this.axis.getUpperBound()), plotArea, edge), EPSILON);
- }
- /**
- * Check the translation java2D to value for left, right, and center point.
- *
- * @param edge the edge.
- * @param plotArea the plot area.
- */
- private void checkPointsToValue(RectangleEdge edge, Rectangle2D plotArea) {
- assertEquals("Right most point on the axis should be end of range.",
- this.axis.getUpperBound(), this.axis.java2DToValue(
- plotArea.getX() + plotArea.getWidth(), plotArea, edge),
- EPSILON);
- assertEquals("Left most point on the axis should be beginning of "
- + "range.", this.axis.getLowerBound(),
- this.axis.java2DToValue(plotArea.getX(), plotArea, edge),
- EPSILON);
- assertEquals("Center point on the axis should geometric mean of the "
- + "bounds.", Math.sqrt(this.axis.getUpperBound()
- * this.axis.getLowerBound()), this.axis.java2DToValue(
- plotArea.getX() + (plotArea.getWidth() / 2), plotArea, edge),
- EPSILON);
- }
- }
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