@Test
 public void addShouldWorkCorrect() {
   ComplexMatrix2x2 matrix = (ComplexMatrix2x2) context.getBean("nonZeroMatrix3");
   ComplexNumber cN1 = ComplexMatrix2x2Util.getComplexNumber(10, 2);
   ComplexNumber cN2 = ComplexMatrix2x2Util.getComplexNumber(6, 8);
   ComplexNumber[][] complexNumbers = new ComplexNumber[][] {{cN1, cN1}, {cN2, cN2}};
   assertTrue(Arrays.deepEquals(matrix.add(matrix).getMatrix(), complexNumbers));
 }