/*
* Encog(tm) Core v3.3 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2014 Heaton Research, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.parse.expression.common;
import junit.framework.Assert;
import junit.framework.TestCase;
import org.encog.Encog;
import org.encog.ml.prg.EncogProgram;
public class TestExpressionVar extends TestCase {
public void testAssignment() {
EncogProgram expression = new EncogProgram("a");
expression.getVariables().setVariable("a",5);
Assert.assertEquals(5,expression.evaluate().toFloatValue(),Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testNegAssignment() {
EncogProgram expression = new EncogProgram("-a");
expression.getVariables().setVariable("a",5);
Assert.assertEquals(-5,expression.evaluate().toFloatValue(),Encog.DEFAULT_DOUBLE_EQUAL);
}
public void test2NegAssignment() {
EncogProgram expression = new EncogProgram("--a");
expression.getVariables().setVariable("a",5);
Assert.assertEquals(5,expression.evaluate().toFloatValue(),Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testAssignment2() {
EncogProgram expression = new EncogProgram("cccc*(aa+bbb)");
expression.getVariables().setVariable("aa",1);
expression.getVariables().setVariable("bbb",2);
expression.getVariables().setVariable("cccc",3);
Assert.assertEquals(9,expression.evaluate().toFloatValue(),Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testAssignment3() {
EncogProgram expression = new EncogProgram("v1+v2+v3");
expression.getVariables().setVariable("v1",1);
expression.getVariables().setVariable("v2",2);
expression.getVariables().setVariable("v3",3);
Assert.assertEquals(6,expression.evaluate().toFloatValue(),Encog.DEFAULT_DOUBLE_EQUAL);
}
public void testVarComplex() {
EncogProgram expression = new EncogProgram("(x^((1+((x^-8)-(4^x)))^(((-7/2)-(0--5.8))/x)))");
expression.getVariables().setVariable("x",10);
Assert.assertTrue(Double.isNaN(expression.evaluate().toFloatValue()));
}
}