fmt.Fprintf(w, "  }\n")
		fmt.Fprintf(w, "}\n")
	}

	// boilerplate at end
	fmt.Fprintf(w, "func TestZero(t *testing.T) {\n")
	for _, s := range sizes {
		fmt.Fprintf(w, "  testZero%d(t)\n", s)
	}
	for _, s := range usizes {
		fmt.Fprintf(w, "  testZero%du(t)\n", s)
	}
	fmt.Fprintf(w, "}\n")

	// gofmt result
	b := w.Bytes()
	src, err := format.Source(b)
	if err != nil {

    } catch (IllegalArgumentException expected) {
    }
    try {
      TopKSelector.greatest(-1, Ordering.natural());
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testZeroK() {
    TopKSelector<Integer> top = TopKSelector.least(0);
    for (int i = 0; i < 10; i++) {
      top.offer(i);
    }
    assertThat(top.topK()).isEmpty();
  }

  public void testNoElementsOffered() {