la4j - Linear Algebra for Java

/*
 * Copyright 2011, Vladimir Kostyukov
 * 
 * This file is part of la4j project (http://la4j.googlecode.com)
 * 
 * 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.
 */

package la4j.inversion;

import junit.framework.TestCase;
import la4j.err.MatrixException;
import la4j.err.MatrixInversionException;
import la4j.factory.DenseFactory;
import la4j.factory.Factory;
import la4j.factory.SparseFactory;
import la4j.matrix.Matrix;

public abstract class AbstractInvertorTest extends TestCase {
	
	public abstract MatrixInvertor invertor();
	public abstract double[][] data();
	
	public Factory[] factories() { 
		return new Factory[] { 
				new SparseFactory(), 
				new DenseFactory()
		}; 
	}
	
	public void testInverse() throws MatrixInversionException, MatrixException {
		
		for (Factory factory: factories()) {
			
			Matrix a = factory.createMatrix(data());
			
			Matrix b = a.inverse(invertor());
			assertEquals(factory.createIdentityMatrix(a.rows()), a.multiply(b));
			
			Matrix c = a.inverse(invertor(), factory);
			assertEquals(factory.createIdentityMatrix(a.rows()), a.multiply(c));
		}
	}
}