@Test
	public void test_mult_skalar() {
		int a = 2;
		int b = 3;
		int skalar = -4;
		Matrix m1 = new MatrixArray(a,b);
		Matrix m2 = new MatrixArray(a,b);
		
		for(int i = 1; i <= a; i++){
			for(int j = 1; j <= b; j++)
				m1.insert(i, j, (double)(2*i-j));
		}
		
		for(int i = 1; i <= a; i++){
			for(int j = 1; j <= b; j++)
				m2.insert(i, j, (double)((2*i-j) * skalar));
		}
		
		
		//System.out.println(m2);
		assertEquals(m2,m1.mul(skalar));
	}