}
/** test solve */
public void testSolve() {
DecompositionSolver solver =
new LUDecompositionImpl(MatrixUtils.createRealMatrix(testData)).getSolver();
RealMatrix b = MatrixUtils.createRealMatrix(new double[][] {
{ 1, 0 }, { 2, -5 }, { 3, 1 }
});
RealMatrix xRef = MatrixUtils.createRealMatrix(new double[][] {
{ 19, -71 }, { -6, 22 }, { -2, 9 }