@Test
public void testAssignRow() {

  double[] data = {2.1, 3.2};
  test.assignRow(1, new DenseVector(data));
  assertEquals("test[1][0]", 2.1, test.getQuick(1, 0), EPSILON);
  assertEquals("test[1][1]", 3.2, test.getQuick(1, 1), EPSILON);
}