@Test
public void shouldAddSetOption()
{

    HelmUpgrade command = Helm.upgrade("foo-release", "foo-chart");
    HelmUpgrade copy    = command.set("bar1", "bar2");
    assertThat(copy, is(not(sameInstance(command))));
    assertCommand(copy, "upgrade", "foo-release", "foo-chart", "--set", "bar1,bar2");
}