@Test
	public void test_insertions() {
		int m = 3;
		int n = 5;
		Matrix m1 = new MatrixArrayList(m, n);

		for (int i = 1; i <= m; i++) {
			for (int j = 1; j <= n; j++)
				m1.insert(i, j, (double) (i * j));
		}

		for (int i = 1; i <= m; i++) {
			for (int j = 1; j <= n; j++)
				assertEquals(m1.get(i, j), (double) (i * j), 0.01);
		}
	}